How does the transcoder process files offline?

It executes FFmpeg libraries compiled to WebAssembly (WASM) inside your browser. This translates the video stream fully client-side using Web Workers.

What is the file size limit?

Since your computer runs the conversions, larger video files will require more system RAM. We recommend files under 100MB for smooth browser performance.

Home Audio & Video StudioUniversal Media Transcoder

Universal Media Transcoder

Video

Convert video and audio formats client-side using local WebAssembly.

Upload Video or Audio to Transcode

Supports MP4, WEBM, MKV, MOV, AVI, MP3, WAV, AAC, and more (up to 500MB)

Initializing local sandbox workspace...

Preparing in-browser processing modules. Zero network uploads.

Need more details?

Read our complete step-by-step guide to local-first media transcoding.

Read Guide

How to use the Universal Media Transcoder

Follow these simple steps to process your files locally in seconds.

Select the video or audio file you want to transcode.

Choose your desired output target container (MP4, WebM, MKV, MP3, etc.) and configure bitrates or quality.

Click the Convert button to compile using local WebAssembly decoders, and download the new media.

100% Client-Side

All calculations run exclusively inside your browser. No files are ever sent to our servers.

Private & Secure

Your data remains entirely yours. Ideal for processing sensitive business or personal files safely.

No Limits, No Fees

No account registration, no file size limitations, and no watermarks added to final results.

Frequently Asked Questions

Got questions about using the Universal Media Transcoder? Find answers here.