EEPROM Programmer
Read, edit, write and verify EEPROM chips with a CH341A, right in Chrome or Edge. Hex table with the text alongside, verify with every difference marked, and a scratch session that remembers your work for the day.
CH341A Setup
Using your own computer? The one-time driver step for Windows, Linux and macOS, how to plug a chip in, and desktop programs that also work.
CyberChef
The browser tool for decoding, converting and unpicking data one step at a time, with the operations you'll reach for most.