WxEDID is a wxWidgets based editor for Extended Display Identification Data (EDID).
It operates on offline files that can be flashed to a monitor using the technique described here: https://wiki.debian.org/RepairEDID.
This tool can modify the base EDID v1.3+ structure and the CEA/CTA-861-G, as the first extension block. The program also provides a DTD constructor to aid with the selection of suitable timings.
The tool can import and export EDID data in binary blob and in hexadecimal formats.