ESP32 Firmware Merger

Merge ESP32 bootloader, partition table, and application binaries into a single firmware file for easier production flashing.

About ESP32 Firmware Merging

This tool merges separate ESP32 firmware binaries into a single file for production flashing. Instead of flashing three separate .bin files at different offsets, you can flash one merged file starting at 0x0.

Component	Default Offset	Description
bootloader.bin	0x0	First-stage bootloader
partitions.bin	0x8000	Partition table layout
firmware.bin	0x10000	Application firmware

Usage: Flash the merged binary with esptool.py write_flash 0x0 merged-firmware.bin

Note: The merged file starts from 0x0 and preserves the exact component layout with proper ESP32 memory spacing. Always flash merged files at 0x0.

Firmware Files

Bootloader: Second-stage bootloader (typically 32KB)

Partition Table: Flash memory layout definition

Application: Main application firmware

Select the .bin files and click "Merge Firmware" to create a single binary for production flashing. The merged file preserves the exact component layout and provides the correct flash command for your configuration.