diff --git a/esphome/components/ch422g/ch422g.cpp b/esphome/components/ch422g/ch422g.cpp
index 9a4e342525..f47b67da6f 100644
--- a/esphome/components/ch422g/ch422g.cpp
+++ b/esphome/components/ch422g/ch422g.cpp
@@ -128,7 +128,9 @@ void CH422GGPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->
 bool CH422GGPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) ^ this->inverted_; }
 
 void CH422GGPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value ^ this->inverted_); }
-std::string CH422GGPIOPin::dump_summary() const { return str_sprintf("EXIO%u via CH422G", pin_); }
+size_t CH422GGPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "EXIO%u via CH422G", this->pin_);
+}
 void CH422GGPIOPin::set_flags(gpio::Flags flags) {
   flags_ = flags;
   this->parent_->pin_mode(this->pin_, flags);
diff --git a/esphome/components/ch422g/ch422g.h b/esphome/components/ch422g/ch422g.h
index 1193a3db27..8ed63db90a 100644
--- a/esphome/components/ch422g/ch422g.h
+++ b/esphome/components/ch422g/ch422g.h
@@ -50,7 +50,7 @@ class CH422GGPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(CH422GComponent *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/esp32/gpio.cpp b/esphome/components/esp32/gpio.cpp
index a98245b889..4b53d3a172 100644
--- a/esphome/components/esp32/gpio.cpp
+++ b/esphome/components/esp32/gpio.cpp
@@ -97,10 +97,8 @@ void ESP32InternalGPIOPin::attach_interrupt(void (*func)(void *), void *arg, gpi
   gpio_isr_handler_add(this->get_pin_num(), func, arg);
 }
 
-std::string ESP32InternalGPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "GPIO%" PRIu32, static_cast<uint32_t>(this->pin_));
-  return buffer;
+size_t ESP32InternalGPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "GPIO%" PRIu32, static_cast<uint32_t>(this->pin_));
 }
 
 void ESP32InternalGPIOPin::setup() {
diff --git a/esphome/components/esp32/gpio.h b/esphome/components/esp32/gpio.h
index d30f4bdcba..3c13bd9b4f 100644
--- a/esphome/components/esp32/gpio.h
+++ b/esphome/components/esp32/gpio.h
@@ -24,7 +24,7 @@ class ESP32InternalGPIOPin : public InternalGPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void detach_interrupt() const override;
   ISRInternalGPIOPin to_isr() const override;
   uint8_t get_pin() const override { return this->pin_; }
diff --git a/esphome/components/esp8266/gpio.cpp b/esphome/components/esp8266/gpio.cpp
index 124df39ce3..7a5ee08984 100644
--- a/esphome/components/esp8266/gpio.cpp
+++ b/esphome/components/esp8266/gpio.cpp
@@ -98,10 +98,8 @@ void ESP8266GPIOPin::pin_mode(gpio::Flags flags) {
   pinMode(pin_, flags_to_mode(flags, pin_));  // NOLINT
 }
 
-std::string ESP8266GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "GPIO%u", pin_);
-  return buffer;
+size_t ESP8266GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "GPIO%u", this->pin_);
 }
 
 bool ESP8266GPIOPin::digital_read() {
diff --git a/esphome/components/esp8266/gpio.h b/esphome/components/esp8266/gpio.h
index 213a5c54be..ff149abfbe 100644
--- a/esphome/components/esp8266/gpio.h
+++ b/esphome/components/esp8266/gpio.h
@@ -17,7 +17,7 @@ class ESP8266GPIOPin : public InternalGPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void detach_interrupt() const override;
   ISRInternalGPIOPin to_isr() const override;
   uint8_t get_pin() const override { return pin_; }
diff --git a/esphome/components/hlw8012/hlw8012.cpp b/esphome/components/hlw8012/hlw8012.cpp
index 73696bd2a5..70a05e4f72 100644
--- a/esphome/components/hlw8012/hlw8012.cpp
+++ b/esphome/components/hlw8012/hlw8012.cpp
@@ -34,9 +34,9 @@ void HLW8012Component::setup() {
 }
 void HLW8012Component::dump_config() {
   ESP_LOGCONFIG(TAG, "HLW8012:");
-  LOG_PIN("  SEL Pin: ", this->sel_pin_)
-  LOG_PIN("  CF Pin: ", this->cf_pin_)
-  LOG_PIN("  CF1 Pin: ", this->cf1_pin_)
+  LOG_PIN("  SEL Pin: ", this->sel_pin_);
+  LOG_PIN("  CF Pin: ", this->cf_pin_);
+  LOG_PIN("  CF1 Pin: ", this->cf1_pin_);
   ESP_LOGCONFIG(TAG,
                 "  Change measurement mode every %" PRIu32 "\n"
                 "  Current resistor: %.1f mΩ\n"
diff --git a/esphome/components/host/gpio.cpp b/esphome/components/host/gpio.cpp
index e46f158513..f99b82bcc2 100644
--- a/esphome/components/host/gpio.cpp
+++ b/esphome/components/host/gpio.cpp
@@ -25,11 +25,7 @@ void HostGPIOPin::attach_interrupt(void (*func)(void *), void *arg, gpio::Interr
 }
 void HostGPIOPin::pin_mode(gpio::Flags flags) { ESP_LOGD(TAG, "Setting pin %d mode to %02X", pin_, (uint32_t) flags); }
 
-std::string HostGPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "GPIO%u", pin_);
-  return buffer;
-}
+size_t HostGPIOPin::dump_summary(char *buffer, size_t len) const { return snprintf(buffer, len, "GPIO%u", this->pin_); }
 
 bool HostGPIOPin::digital_read() { return inverted_; }
 void HostGPIOPin::digital_write(bool value) {
diff --git a/esphome/components/host/gpio.h b/esphome/components/host/gpio.h
index ae677291b9..ea6b13f436 100644
--- a/esphome/components/host/gpio.h
+++ b/esphome/components/host/gpio.h
@@ -17,7 +17,7 @@ class HostGPIOPin : public InternalGPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void detach_interrupt() const override;
   ISRInternalGPIOPin to_isr() const override;
   uint8_t get_pin() const override { return pin_; }
diff --git a/esphome/components/libretiny/gpio_arduino.cpp b/esphome/components/libretiny/gpio_arduino.cpp
index 7a1e014ea4..0b14c77cf2 100644
--- a/esphome/components/libretiny/gpio_arduino.cpp
+++ b/esphome/components/libretiny/gpio_arduino.cpp
@@ -63,10 +63,8 @@ void ArduinoInternalGPIOPin::pin_mode(gpio::Flags flags) {
   pinMode(pin_, flags_to_mode(flags));  // NOLINT
 }
 
-std::string ArduinoInternalGPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u", pin_);
-  return buffer;
+size_t ArduinoInternalGPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u", this->pin_);
 }
 
 bool ArduinoInternalGPIOPin::digital_read() {
diff --git a/esphome/components/libretiny/gpio_arduino.h b/esphome/components/libretiny/gpio_arduino.h
index 3674748c18..30c7c33869 100644
--- a/esphome/components/libretiny/gpio_arduino.h
+++ b/esphome/components/libretiny/gpio_arduino.h
@@ -16,7 +16,7 @@ class ArduinoInternalGPIOPin : public InternalGPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void detach_interrupt() const override;
   ISRInternalGPIOPin to_isr() const override;
   uint8_t get_pin() const override { return pin_; }
diff --git a/esphome/components/max6956/max6956.cpp b/esphome/components/max6956/max6956.cpp
index a377a1a192..13fe5a5323 100644
--- a/esphome/components/max6956/max6956.cpp
+++ b/esphome/components/max6956/max6956.cpp
@@ -161,10 +161,8 @@ void MAX6956GPIOPin::setup() { pin_mode(flags_); }
 void MAX6956GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool MAX6956GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void MAX6956GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string MAX6956GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via Max6956", pin_);
-  return buffer;
+size_t MAX6956GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via Max6956", this->pin_);
 }
 
 }  // namespace max6956
diff --git a/esphome/components/max6956/max6956.h b/esphome/components/max6956/max6956.h
index 0a1fd5e4b5..0c609b0b43 100644
--- a/esphome/components/max6956/max6956.h
+++ b/esphome/components/max6956/max6956.h
@@ -76,7 +76,7 @@ class MAX6956GPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(MAX6956 *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/mcp23016/mcp23016.cpp b/esphome/components/mcp23016/mcp23016.cpp
index be86cb2256..87c2668962 100644
--- a/esphome/components/mcp23016/mcp23016.cpp
+++ b/esphome/components/mcp23016/mcp23016.cpp
@@ -99,10 +99,8 @@ void MCP23016GPIOPin::setup() { pin_mode(flags_); }
 void MCP23016GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool MCP23016GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void MCP23016GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string MCP23016GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via MCP23016", pin_);
-  return buffer;
+size_t MCP23016GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via MCP23016", this->pin_);
 }
 
 }  // namespace mcp23016
diff --git a/esphome/components/mcp23016/mcp23016.h b/esphome/components/mcp23016/mcp23016.h
index 781c207de0..c2bc885c95 100644
--- a/esphome/components/mcp23016/mcp23016.h
+++ b/esphome/components/mcp23016/mcp23016.h
@@ -60,7 +60,7 @@ class MCP23016GPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(MCP23016 *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/mcp23xxx_base/mcp23xxx_base.cpp b/esphome/components/mcp23xxx_base/mcp23xxx_base.cpp
index 81324e794f..302f6b8280 100644
--- a/esphome/components/mcp23xxx_base/mcp23xxx_base.cpp
+++ b/esphome/components/mcp23xxx_base/mcp23xxx_base.cpp
@@ -16,8 +16,8 @@ template<uint8_t N> bool MCP23XXXGPIOPin<N>::digital_read() {
 template<uint8_t N> void MCP23XXXGPIOPin<N>::digital_write(bool value) {
   this->parent_->digital_write(this->pin_, value != this->inverted_);
 }
-template<uint8_t N> std::string MCP23XXXGPIOPin<N>::dump_summary() const {
-  return str_snprintf("%u via MCP23XXX", 15, pin_);
+template<uint8_t N> size_t MCP23XXXGPIOPin<N>::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via MCP23XXX", this->pin_);
 }
 
 template class MCP23XXXGPIOPin<8>;
diff --git a/esphome/components/mcp23xxx_base/mcp23xxx_base.h b/esphome/components/mcp23xxx_base/mcp23xxx_base.h
index cf0ef5d41c..fb992466d5 100644
--- a/esphome/components/mcp23xxx_base/mcp23xxx_base.h
+++ b/esphome/components/mcp23xxx_base/mcp23xxx_base.h
@@ -36,7 +36,7 @@ template<uint8_t N> class MCP23XXXGPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(MCP23XXXBase<N> *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/mpr121/mpr121.cpp b/esphome/components/mpr121/mpr121.cpp
index 5a8a8e7205..4b358e384c 100644
--- a/esphome/components/mpr121/mpr121.cpp
+++ b/esphome/components/mpr121/mpr121.cpp
@@ -153,10 +153,8 @@ void MPR121GPIOPin::digital_write(bool value) {
   this->parent_->digital_write(this->pin_ - 4, value != this->inverted_);
 }
 
-std::string MPR121GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "ELE%u on MPR121", this->pin_);
-  return buffer;
+size_t MPR121GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "ELE%u on MPR121", this->pin_);
 }
 
 }  // namespace mpr121
diff --git a/esphome/components/mpr121/mpr121.h b/esphome/components/mpr121/mpr121.h
index 6dd2c38309..085018fff0 100644
--- a/esphome/components/mpr121/mpr121.h
+++ b/esphome/components/mpr121/mpr121.h
@@ -109,7 +109,7 @@ class MPR121GPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(MPR121Component *parent) { this->parent_ = parent; }
   void set_pin(uint8_t pin) { this->pin_ = pin; }
diff --git a/esphome/components/pca6416a/pca6416a.cpp b/esphome/components/pca6416a/pca6416a.cpp
index c0056e780b..909bac5f05 100644
--- a/esphome/components/pca6416a/pca6416a.cpp
+++ b/esphome/components/pca6416a/pca6416a.cpp
@@ -180,10 +180,8 @@ void PCA6416AGPIOPin::setup() { pin_mode(flags_); }
 void PCA6416AGPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool PCA6416AGPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void PCA6416AGPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string PCA6416AGPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via PCA6416A", pin_);
-  return buffer;
+size_t PCA6416AGPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via PCA6416A", this->pin_);
 }
 
 }  // namespace pca6416a
diff --git a/esphome/components/pca6416a/pca6416a.h b/esphome/components/pca6416a/pca6416a.h
index 10a4a64e9b..138a51cc20 100644
--- a/esphome/components/pca6416a/pca6416a.h
+++ b/esphome/components/pca6416a/pca6416a.h
@@ -52,7 +52,7 @@ class PCA6416AGPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(PCA6416AComponent *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/pca9554/pca9554.cpp b/esphome/components/pca9554/pca9554.cpp
index e8d49f66e2..a6f9c2396c 100644
--- a/esphome/components/pca9554/pca9554.cpp
+++ b/esphome/components/pca9554/pca9554.cpp
@@ -129,10 +129,8 @@ void PCA9554GPIOPin::setup() { pin_mode(flags_); }
 void PCA9554GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool PCA9554GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void PCA9554GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string PCA9554GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via PCA9554", pin_);
-  return buffer;
+size_t PCA9554GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via PCA9554", this->pin_);
 }
 
 }  // namespace pca9554
diff --git a/esphome/components/pca9554/pca9554.h b/esphome/components/pca9554/pca9554.h
index 7b356b4068..bf752e50c9 100644
--- a/esphome/components/pca9554/pca9554.h
+++ b/esphome/components/pca9554/pca9554.h
@@ -59,7 +59,7 @@ class PCA9554GPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(PCA9554Component *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/pcf8574/pcf8574.cpp b/esphome/components/pcf8574/pcf8574.cpp
index 72d8865d7f..15418bfee5 100644
--- a/esphome/components/pcf8574/pcf8574.cpp
+++ b/esphome/components/pcf8574/pcf8574.cpp
@@ -104,10 +104,8 @@ void PCF8574GPIOPin::setup() { pin_mode(flags_); }
 void PCF8574GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool PCF8574GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void PCF8574GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string PCF8574GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via PCF8574", pin_);
-  return buffer;
+size_t PCF8574GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via PCF8574", this->pin_);
 }
 
 }  // namespace pcf8574
diff --git a/esphome/components/pcf8574/pcf8574.h b/esphome/components/pcf8574/pcf8574.h
index fd1ea8af63..5203030142 100644
--- a/esphome/components/pcf8574/pcf8574.h
+++ b/esphome/components/pcf8574/pcf8574.h
@@ -54,7 +54,7 @@ class PCF8574GPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(PCF8574Component *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
diff --git a/esphome/components/pi4ioe5v6408/pi4ioe5v6408.cpp b/esphome/components/pi4ioe5v6408/pi4ioe5v6408.cpp
index 517ca833e6..f3a1f013d9 100644
--- a/esphome/components/pi4ioe5v6408/pi4ioe5v6408.cpp
+++ b/esphome/components/pi4ioe5v6408/pi4ioe5v6408.cpp
@@ -164,7 +164,9 @@ bool PI4IOE5V6408GPIOPin::digital_read() { return this->parent_->digital_read(th
 void PI4IOE5V6408GPIOPin::digital_write(bool value) {
   this->parent_->digital_write(this->pin_, value != this->inverted_);
 }
-std::string PI4IOE5V6408GPIOPin::dump_summary() const { return str_sprintf("%u via PI4IOE5V6408", this->pin_); }
+size_t PI4IOE5V6408GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via PI4IOE5V6408", this->pin_);
+}
 
 }  // namespace pi4ioe5v6408
 }  // namespace esphome
diff --git a/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h b/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h
index 82b3076fab..4dc31201ce 100644
--- a/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h
+++ b/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h
@@ -52,7 +52,7 @@ class PI4IOE5V6408GPIOPin : public GPIOPin, public Parented<PI4IOE5V6408Componen
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_pin(uint8_t pin) { this->pin_ = pin; }
   void set_inverted(bool inverted) { this->inverted_ = inverted; }
diff --git a/esphome/components/rp2040/gpio.cpp b/esphome/components/rp2040/gpio.cpp
index 3927815e46..2b1699f888 100644
--- a/esphome/components/rp2040/gpio.cpp
+++ b/esphome/components/rp2040/gpio.cpp
@@ -64,10 +64,8 @@ void RP2040GPIOPin::pin_mode(gpio::Flags flags) {
   pinMode(pin_, flags_to_mode(flags, pin_));  // NOLINT
 }
 
-std::string RP2040GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "GPIO%u", pin_);
-  return buffer;
+size_t RP2040GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "GPIO%u", this->pin_);
 }
 
 bool RP2040GPIOPin::digital_read() {
diff --git a/esphome/components/rp2040/gpio.h b/esphome/components/rp2040/gpio.h
index 47a6fe17f2..a98e1dab14 100644
--- a/esphome/components/rp2040/gpio.h
+++ b/esphome/components/rp2040/gpio.h
@@ -18,7 +18,7 @@ class RP2040GPIOPin : public InternalGPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void detach_interrupt() const override;
   ISRInternalGPIOPin to_isr() const override;
   uint8_t get_pin() const override { return pin_; }
diff --git a/esphome/components/sn74hc165/sn74hc165.cpp b/esphome/components/sn74hc165/sn74hc165.cpp
index 416d9db293..718e0b86ed 100644
--- a/esphome/components/sn74hc165/sn74hc165.cpp
+++ b/esphome/components/sn74hc165/sn74hc165.cpp
@@ -64,7 +64,9 @@ float SN74HC165Component::get_setup_priority() const { return setup_priority::IO
 
 bool SN74HC165GPIOPin::digital_read() { return this->parent_->digital_read_(this->pin_) != this->inverted_; }
 
-std::string SN74HC165GPIOPin::dump_summary() const { return str_snprintf("%u via SN74HC165", 18, pin_); }
+size_t SN74HC165GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via SN74HC165", this->pin_);
+}
 
 }  // namespace sn74hc165
 }  // namespace esphome
diff --git a/esphome/components/sn74hc165/sn74hc165.h b/esphome/components/sn74hc165/sn74hc165.h
index 4684844687..5a3f3fe8ef 100644
--- a/esphome/components/sn74hc165/sn74hc165.h
+++ b/esphome/components/sn74hc165/sn74hc165.h
@@ -47,7 +47,7 @@ class SN74HC165GPIOPin : public GPIOPin, public Parented<SN74HC165Component> {
   void pin_mode(gpio::Flags flags) override {}
   bool digital_read() override;
   void digital_write(bool value) override{};
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_pin(uint16_t pin) { pin_ = pin; }
   void set_inverted(bool inverted) { inverted_ = inverted; }
diff --git a/esphome/components/sn74hc595/sn74hc595.cpp b/esphome/components/sn74hc595/sn74hc595.cpp
index a9ada432e4..6b5c5d9fc4 100644
--- a/esphome/components/sn74hc595/sn74hc595.cpp
+++ b/esphome/components/sn74hc595/sn74hc595.cpp
@@ -93,7 +93,9 @@ float SN74HC595Component::get_setup_priority() const { return setup_priority::IO
 void SN74HC595GPIOPin::digital_write(bool value) {
   this->parent_->digital_write_(this->pin_, value != this->inverted_);
 }
-std::string SN74HC595GPIOPin::dump_summary() const { return str_snprintf("%u via SN74HC595", 18, pin_); }
+size_t SN74HC595GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via SN74HC595", this->pin_);
+}
 
 }  // namespace sn74hc595
 }  // namespace esphome
diff --git a/esphome/components/sn74hc595/sn74hc595.h b/esphome/components/sn74hc595/sn74hc595.h
index 181015b1e6..1cf70c86b5 100644
--- a/esphome/components/sn74hc595/sn74hc595.h
+++ b/esphome/components/sn74hc595/sn74hc595.h
@@ -54,7 +54,7 @@ class SN74HC595GPIOPin : public GPIOPin, public Parented<SN74HC595Component> {
   void pin_mode(gpio::Flags flags) override {}
   bool digital_read() override { return false; }
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_pin(uint16_t pin) { pin_ = pin; }
   void set_inverted(bool inverted) { inverted_ = inverted; }
diff --git a/esphome/components/spi/spi.cpp b/esphome/components/spi/spi.cpp
index c4876d1a74..36344a6d38 100644
--- a/esphome/components/spi/spi.cpp
+++ b/esphome/components/spi/spi.cpp
@@ -64,9 +64,9 @@ void SPIComponent::setup() {
 
 void SPIComponent::dump_config() {
   ESP_LOGCONFIG(TAG, "SPI bus:");
-  LOG_PIN("  CLK Pin: ", this->clk_pin_)
-  LOG_PIN("  SDI Pin: ", this->sdi_pin_)
-  LOG_PIN("  SDO Pin: ", this->sdo_pin_)
+  LOG_PIN("  CLK Pin: ", this->clk_pin_);
+  LOG_PIN("  SDI Pin: ", this->sdi_pin_);
+  LOG_PIN("  SDO Pin: ", this->sdo_pin_);
   for (size_t i = 0; i != this->data_pins_.size(); i++) {
     ESP_LOGCONFIG(TAG, "  Data pin %u: GPIO%d", i, this->data_pins_[i]);
   }
diff --git a/esphome/components/spi/spi.h b/esphome/components/spi/spi.h
index 256cbcc65f..e237cf44f4 100644
--- a/esphome/components/spi/spi.h
+++ b/esphome/components/spi/spi.h
@@ -120,7 +120,11 @@ class NullPin : public GPIOPin {
 
   void digital_write(bool value) override {}
 
-  std::string dump_summary() const override { return std::string(); }
+  size_t dump_summary(char *buffer, size_t len) const override {
+    if (len > 0)
+      buffer[0] = '\0';
+    return 0;
+  }
 
  protected:
   static GPIOPin *const NULL_PIN;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
diff --git a/esphome/components/sx1509/sx1509_gpio_pin.cpp b/esphome/components/sx1509/sx1509_gpio_pin.cpp
index a74c8b60b8..41a99eba4b 100644
--- a/esphome/components/sx1509/sx1509_gpio_pin.cpp
+++ b/esphome/components/sx1509/sx1509_gpio_pin.cpp
@@ -12,10 +12,8 @@ void SX1509GPIOPin::setup() { pin_mode(flags_); }
 void SX1509GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool SX1509GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void SX1509GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string SX1509GPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via sx1509", this->pin_);
-  return buffer;
+size_t SX1509GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via sx1509", this->pin_);
 }
 
 }  // namespace sx1509
diff --git a/esphome/components/sx1509/sx1509_gpio_pin.h b/esphome/components/sx1509/sx1509_gpio_pin.h
index eb9207e882..5903af9d12 100644
--- a/esphome/components/sx1509/sx1509_gpio_pin.h
+++ b/esphome/components/sx1509/sx1509_gpio_pin.h
@@ -13,7 +13,7 @@ class SX1509GPIOPin : public GPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_parent(SX1509Component *parent) { this->parent_ = parent; }
   void set_pin(uint8_t pin) { this->pin_ = pin; }
diff --git a/esphome/components/tca9555/tca9555.cpp b/esphome/components/tca9555/tca9555.cpp
index c3449ce254..376de6a370 100644
--- a/esphome/components/tca9555/tca9555.cpp
+++ b/esphome/components/tca9555/tca9555.cpp
@@ -138,7 +138,9 @@ void TCA9555GPIOPin::setup() { this->pin_mode(this->flags_); }
 void TCA9555GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool TCA9555GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
 void TCA9555GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
-std::string TCA9555GPIOPin::dump_summary() const { return str_sprintf("%u via TCA9555", this->pin_); }
+size_t TCA9555GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via TCA9555", this->pin_);
+}
 
 }  // namespace tca9555
 }  // namespace esphome
diff --git a/esphome/components/tca9555/tca9555.h b/esphome/components/tca9555/tca9555.h
index 0c236ae4e3..9f7273b1e7 100644
--- a/esphome/components/tca9555/tca9555.h
+++ b/esphome/components/tca9555/tca9555.h
@@ -48,7 +48,7 @@ class TCA9555GPIOPin : public GPIOPin, public Parented<TCA9555Component> {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
 
   void set_pin(uint8_t pin) { this->pin_ = pin; }
   void set_inverted(bool inverted) { this->inverted_ = inverted; }
diff --git a/esphome/components/waveshare_epaper/waveshare_213v3.cpp b/esphome/components/waveshare_epaper/waveshare_213v3.cpp
index 068cb91d31..b55f3c8d26 100644
--- a/esphome/components/waveshare_epaper/waveshare_213v3.cpp
+++ b/esphome/components/waveshare_epaper/waveshare_213v3.cpp
@@ -177,10 +177,10 @@ uint32_t WaveshareEPaper2P13InV3::idle_timeout_() { return 5000; }
 void WaveshareEPaper2P13InV3::dump_config() {
   LOG_DISPLAY("", "Waveshare E-Paper", this)
   ESP_LOGCONFIG(TAG, "  Model: 2.13inV3");
-  LOG_PIN("  CS Pin: ", this->cs_)
-  LOG_PIN("  Reset Pin: ", this->reset_pin_)
-  LOG_PIN("  DC Pin: ", this->dc_pin_)
-  LOG_PIN("  Busy Pin: ", this->busy_pin_)
+  LOG_PIN("  CS Pin: ", this->cs_);
+  LOG_PIN("  Reset Pin: ", this->reset_pin_);
+  LOG_PIN("  DC Pin: ", this->dc_pin_);
+  LOG_PIN("  Busy Pin: ", this->busy_pin_);
   LOG_UPDATE_INTERVAL(this);
 }
 
diff --git a/esphome/components/weikai/weikai.cpp b/esphome/components/weikai/weikai.cpp
index ebe987cc65..3384a0572f 100644
--- a/esphome/components/weikai/weikai.cpp
+++ b/esphome/components/weikai/weikai.cpp
@@ -245,10 +245,8 @@ void WeikaiGPIOPin::setup() {
   this->pin_mode(this->flags_);
 }
 
-std::string WeikaiGPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "%u via WeiKai %s", this->pin_, this->parent_->get_name());
-  return buffer;
+size_t WeikaiGPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via WeiKai %s", this->pin_, this->parent_->get_name());
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/esphome/components/weikai/weikai.h b/esphome/components/weikai/weikai.h
index 987278213a..a27c14106d 100644
--- a/esphome/components/weikai/weikai.h
+++ b/esphome/components/weikai/weikai.h
@@ -278,7 +278,7 @@ class WeikaiGPIOPin : public GPIOPin {
   gpio::Flags get_flags() const override { return this->flags_; }
 
   void setup() override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void pin_mode(gpio::Flags flags) override { this->parent_->set_pin_direction_(this->pin_, flags); }
   bool digital_read() override { return this->parent_->read_pin_val_(this->pin_) != this->inverted_; }
   void digital_write(bool value) override { this->parent_->write_pin_val_(this->pin_, value != this->inverted_); }
diff --git a/esphome/components/xl9535/xl9535.cpp b/esphome/components/xl9535/xl9535.cpp
index 958fc5eede..dd6c8188eb 100644
--- a/esphome/components/xl9535/xl9535.cpp
+++ b/esphome/components/xl9535/xl9535.cpp
@@ -110,7 +110,9 @@ void XL9535Component::pin_mode(uint8_t pin, gpio::Flags mode) {
 
 void XL9535GPIOPin::setup() { this->pin_mode(this->flags_); }
 
-std::string XL9535GPIOPin::dump_summary() const { return str_snprintf("%u via XL9535", 15, this->pin_); }
+size_t XL9535GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "%u via XL9535", this->pin_);
+}
 
 void XL9535GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool XL9535GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
diff --git a/esphome/components/xl9535/xl9535.h b/esphome/components/xl9535/xl9535.h
index 3b511fd9b3..be0e2fbd82 100644
--- a/esphome/components/xl9535/xl9535.h
+++ b/esphome/components/xl9535/xl9535.h
@@ -39,7 +39,7 @@ class XL9535GPIOPin : public GPIOPin {
   gpio::Flags get_flags() const override { return this->flags_; }
 
   void setup() override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
diff --git a/esphome/components/zephyr/gpio.cpp b/esphome/components/zephyr/gpio.cpp
index 41b983535c..8041c361cc 100644
--- a/esphome/components/zephyr/gpio.cpp
+++ b/esphome/components/zephyr/gpio.cpp
@@ -85,10 +85,8 @@ void ZephyrGPIOPin::pin_mode(gpio::Flags flags) {
   }
 }
 
-std::string ZephyrGPIOPin::dump_summary() const {
-  char buffer[32];
-  snprintf(buffer, sizeof(buffer), "GPIO%u, P%u.%u", this->pin_, this->pin_ / 32, this->pin_ % 32);
-  return buffer;
+size_t ZephyrGPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "GPIO%u, P%u.%u", this->pin_, this->pin_ / 32, this->pin_ % 32);
 }
 
 bool ZephyrGPIOPin::digital_read() {
diff --git a/esphome/components/zephyr/gpio.h b/esphome/components/zephyr/gpio.h
index 6e8f81857a..b405f385bc 100644
--- a/esphome/components/zephyr/gpio.h
+++ b/esphome/components/zephyr/gpio.h
@@ -16,7 +16,7 @@ class ZephyrGPIOPin : public InternalGPIOPin {
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
-  std::string dump_summary() const override;
+  size_t dump_summary(char *buffer, size_t len) const override;
   void detach_interrupt() const override;
   ISRInternalGPIOPin to_isr() const override;
   uint8_t get_pin() const override { return this->pin_; }
diff --git a/esphome/core/gpio.cpp b/esphome/core/gpio.cpp
new file mode 100644
index 0000000000..21e88b5b6d
--- /dev/null
+++ b/esphome/core/gpio.cpp
@@ -0,0 +1,24 @@
+#include "esphome/core/gpio.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+
+#ifdef USE_ESP8266
+void log_pin(const char *tag, const __FlashStringHelper *prefix, GPIOPin *pin) {
+  if (pin == nullptr)
+    return;
+  static constexpr size_t LOG_PIN_PREFIX_MAX_LEN = 32;
+  char prefix_buf[LOG_PIN_PREFIX_MAX_LEN];
+  strncpy_P(prefix_buf, reinterpret_cast<const char *>(prefix), sizeof(prefix_buf) - 1);
+  prefix_buf[sizeof(prefix_buf) - 1] = '\0';
+  log_pin_with_prefix(tag, prefix_buf, pin);
+}
+#else
+void log_pin(const char *tag, const char *prefix, GPIOPin *pin) {
+  if (pin == nullptr)
+    return;
+  log_pin_with_prefix(tag, prefix, pin);
+}
+#endif
+
+}  // namespace esphome
diff --git a/esphome/core/gpio.h b/esphome/core/gpio.h
index dd6f14fef9..f2f85e18bc 100644
--- a/esphome/core/gpio.h
+++ b/esphome/core/gpio.h
@@ -1,13 +1,22 @@
 #pragma once
+#include <algorithm>
 #include <cstdint>
+#include <cstring>
 #include <string>
 
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
 namespace esphome {
 
-#define LOG_PIN(prefix, pin) \
-  if ((pin) != nullptr) { \
-    ESP_LOGCONFIG(TAG, prefix "%s", (pin)->dump_summary().c_str()); \
-  }
+/// Maximum buffer size for dump_summary output
+inline constexpr size_t GPIO_SUMMARY_MAX_LEN = 48;
+
+#ifdef USE_ESP8266
+#define LOG_PIN(prefix, pin) log_pin(TAG, F(prefix), pin)
+#else
+#define LOG_PIN(prefix, pin) log_pin(TAG, prefix, pin)
+#endif
 
 // put GPIO flags in a namespace to not pollute esphome namespace
 namespace gpio {
@@ -64,7 +73,17 @@ class GPIOPin {
 
   virtual void digital_write(bool value) = 0;
 
-  virtual std::string dump_summary() const = 0;
+  /// Write a summary of this pin to the provided buffer.
+  /// @param buffer The buffer to write to
+  /// @param len The size of the buffer (must be > 0)
+  /// @return The number of characters that would be written (excluding null terminator),
+  ///         which may exceed len-1 if truncation occurred (snprintf semantics)
+  virtual size_t dump_summary(char *buffer, size_t len) const;
+
+  /// Get a summary of this pin as a string.
+  /// @deprecated Use dump_summary(char*, size_t) instead. Will be removed in 2026.7.0.
+  ESPDEPRECATED("Override dump_summary(char*, size_t) instead. Will be removed in 2026.7.0.", "2026.1.0")
+  virtual std::string dump_summary() const;
 
   virtual bool is_internal() { return false; }
 };
@@ -103,4 +122,41 @@ class InternalGPIOPin : public GPIOPin {
   virtual void attach_interrupt(void (*func)(void *), void *arg, gpio::InterruptType type) const = 0;
 };
 
+// Inline default implementations for GPIOPin virtual methods.
+// These provide bridge functionality for backwards compatibility with external components.
+
+// Default implementation bridges to old std::string method for backwards compatibility.
+inline size_t GPIOPin::dump_summary(char *buffer, size_t len) const {
+  if (len == 0)
+    return 0;
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+  std::string s = this->dump_summary();
+#pragma GCC diagnostic pop
+  size_t copy_len = std::min(s.size(), len - 1);
+  memcpy(buffer, s.c_str(), copy_len);
+  buffer[copy_len] = '\0';
+  return s.size();  // Return would-be length (snprintf semantics)
+}
+
+// Default implementation returns empty string.
+// External components should override this if they haven't migrated to buffer-based version.
+// Remove before 2026.7.0
+inline std::string GPIOPin::dump_summary() const { return {}; }
+
+// Inline helper for log_pin - allows compiler to inline into log_pin in gpio.cpp
+inline void log_pin_with_prefix(const char *tag, const char *prefix, GPIOPin *pin) {
+  char buffer[GPIO_SUMMARY_MAX_LEN];
+  size_t len = pin->dump_summary(buffer, sizeof(buffer));
+  len = std::min(len, sizeof(buffer) - 1);
+  esp_log_printf_(ESPHOME_LOG_LEVEL_CONFIG, tag, __LINE__, "%s%.*s", prefix, (int) len, buffer);
+}
+
+// log_pin function declarations - implementation in gpio.cpp
+#ifdef USE_ESP8266
+void log_pin(const char *tag, const __FlashStringHelper *prefix, GPIOPin *pin);
+#else
+void log_pin(const char *tag, const char *prefix, GPIOPin *pin);
+#endif
+
 }  // namespace esphome