HeidiSQL Password Decoder

A simple tool to decode HeidiSQL stored passwords. Built with Go + WebAssembly.

Live: https://anudeepd.github.io/heidisql-password-decoder/

Usage

1. Open index.html in a browser (or visit the deployed site)
2. Enter an encoded HeidiSQL password (hex string)
3. Click Decode to reveal the password
4. Click Copy to copy the result

Features

• Dark/Light theme toggle
• Clear error messages for invalid input
• Copy to clipboard
• Keyboard support (Enter to decode)

Development

Build

GOOS=js GOARCH=wasm go build -o decoder.wasm main.go

Run locally

python3 -m http.server 8080

Then open http://localhost:8080

Files

File	Description
main.go	Go source code
decoder.wasm	Compiled WebAssembly module
index.html	User interface
wasm_exec.js	Go runtime for WebAssembly

Getting wasm_exec.js

This file comes bundled with Go. Copy it from your Go installation:

# Common paths (varies by OS/install)
cp "$(go env GOROOT)/lib/wasm/wasm_exec.js" .
# or
cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .

Deploy to GitHub Pages

1. Push all files to a GitHub repository
2. Go to Settings → Pages
3. Select main branch as source
4. Save and wait for deployment

Credits

HeidiSQL password decoding algorithm based on:

• Original: https://gist.github.com/jpatters/4553139
• Archived: https://archive.softwareheritage.org/browse/content/sha1_git:037292fd4c6fe097c6c75246541fe647988775a0/?origin_url=https://gist.github.com/jpatters/4553139&path=HeidiDecode.js

Vibe-coded using the Big Pickle model via OpenCode