Windows only • AV1-ready • Stream copy

WebM (AV1) doesn’t open?
Fix it in seconds.

Stream copy on supported files. No re-encode on the paid path.
Built for modern WebM files that should become MP4 without wasting time. Works best on AV1. Free demo is watermarked and re-encoded.
See options ↓ See price
Support development (optional)
USDT (TRC20)
TBzafGnqUhwV5YvSXkBM4oHzozovd5bjK9
Stream copy is used on compatible files. Free demo exists to show the workflow, but it is not the same path.
Drag & Drop → MP4 output

What this is for

It is for people who already have a WebM file and need an MP4 that opens cleanly on Windows without turning it into a general-purpose video converter.

Fix playback

Turns compatible WebM files into MP4 files that are easier to open and share.

Batch-ready

Drop one file or a whole folder. The app processes them one by one and keeps going.

Visible progress

A small progress window shows the current file and overall progress while it works.

Why people upgrade

Free demo

  • Re-encoding wastes time on larger files
  • Output is watermarked
  • The result is usable, but not clean

Full version

  • Stream copy on supported files
  • Original quality preserved where possible
  • No watermark, no unnecessary wait
This is not a universal converter. It is built for modern WebM, especially AV1, where stream copy is the point.

Choose payment method

License price: 12 USDT. One-time payment. No account.
Continue to payment — 12 USDT
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License | EULA