Restore Unplayable Vintage MP4s

Losslessly repairs muted audio and transcodes legacy MPEG-4 (mp4v) video tracks into modern, universal H.264 right inside your browser.

100% Private: Media never leaves your device. Processed locally in memory. Zero uploads.

🎯 Device Scope: Built specifically for vintage JXD handheld gaming devices (JXD 1000 / 3000 / S-series), Dingoo, and 2000s–early 2010s portable media recorders with AAC mono/stereo mismatch bugs.

Open Source: 100% free under AGPLv3. Inspect the code, report device quirks, or star on GitHub ↗.

Drop retro MP4 recordings here

Supports individual .mp4 files or complete video folders