A web application that generates Ed25519 keys compatible with MeshCore. Runs entirely in your browser.

Generates Ed25519 key pairs where the public key starts with a specific hex prefix. MeshCore uses the first two characters of the public key as a node identifier, so this helps avoid collisions with neighboring nodes.

• Generate Ed25519 keys with custom hex prefixes (1-8 characters)
• Real-time progress display (attempts, speed, time)
• JSON export of generated keys
• Import instructions for MeshCore nodes
• URL parameter support for pre-filling prefixes

1. Open index.html in a web browser
2. Enter a hex prefix (e.g., "F8", "F8A1")
3. Click "Generate Key"
4. Download the JSON file when complete

Pre-fill the prefix input:

• index.html?prefix=FA - Sets prefix to "FA"
• index.html?prefix=f8a1 - Sets prefix to "F8A1"

• Private Key: 64 bytes (128 hex characters)
• Public Key: 32 bytes (64 hex characters)

Baseline: ~100,000 keys/second on modern devices. Example measurements:

• iPhone 15 Pro: ~100k keys/sec
• M4 Mac Mini: ~300k keys/sec
• Intel i7-9700K: ~85k keys/sec
• AMD Ryzen 9950X: ~417k keys/sec

Expected time to find a key at 100k keys/second:

• 1-character prefix: < 0.01 seconds
• 2-character prefix: ~0.003 seconds
• 3-character prefix: ~0.04 seconds
• 4-character prefix: ~0.7 seconds
• 5-character prefix: ~10 seconds
• 6-character prefix: ~3 minutes
• 7-character prefix: ~45 minutes
• 8-character prefix: ~12 hours

• index.html?perfDebug=1 enables live worker performance counters in the progress line.
• Browser console helper: await runPerfSmoke('F8', 10) runs a fixed-duration smoke test and returns sampled keys/sec plus median throughput.
• window.keyGenerator is exposed for quick manual inspection while tuning worker/batch behavior.

Chrome 60+, Firefox 55+, Safari 11+, Edge 79+

1. Connect to your node using the MeshCore app
2. Tap the Settings gear icon
3. Tap "Manage Identity Key"
4. Paste your Private Key into the text box
5. Tap "Import Private Key"
6. Tap the checkmark ✓ to save changes

1. Flash companion firmware temporarily
2. Follow companion instructions above
3. Re-flash to repeater firmware

1. MeshCore app → Import Config
2. Select downloaded JSON file

{
  "public_key": "F8A1B2C3D4E5F6789012345678901234567890ABCDEF1234567890ABCDEF12",
  "private_key": "305e0b1b3142a95882915c43cd806df904247a2d505505f73dfb0cde9e666c4d656591bb4b5a23b6f47c786bf6cccfa0c4423c4617bbc9ab51dfb6f016f84144"
}

Filename: meshcore_[PREFIX]_[TIMESTAMP].json

• All processing happens in your browser
• No network requests during generation
• Keys never leave your device

For more complex key generation patterns (cosmetic patterns, longer prefixes, multi-processing), see the Python version which supports:

• Multi-threaded generation for faster performance
• Cosmetic pattern matching (palindromic keys, etc.)
• Watchlist monitoring for multiple patterns
• Advanced pattern modes and batch processing

Slow performance: Close other tabs, use desktop, try shorter prefixes

Browser freezes: Refresh the page

No match found: Normal for difficult patterns, try shorter prefix