Intel HEX Utility

HEX Merger

Merge IAP, OTA, application, bootloader, and configuration HEX files into one clean Intel HEX file. All processing runs locally in your browser. Nothing is uploaded.

Recommended for IAP + OTA

Use this tool to combine files such as IAP.hex and OTA_APP.hex. The tool parses real Intel HEX addresses, removes the EOF line from earlier files, appends the next HEX file, and keeps the original HEX records unchanged.

1–5 HEX files Overlap check Local only HEX friendly

Sort files by the lowest HEX address before merging. Lower address is placed first. Simple append mode: remove EOF from earlier files, then append the next HEX file. Do not regenerate, sort, or fill address gaps. Keep original HEX line order.

Output name

File summary

No HEX files loaded yet.

Merge log

Waiting for files...

HEX Merger

Recommended for IAP + OTA

Drop HEX files

File summary

Merge log