Free Online Video & Audio Tools
Real video processing without uploading a single byte. These tools run a full copy of FFmpeg inside your browser, so your clips are converted on your own device – no queue, no account, no watermark.
Choose a tool
MP4 to MP3 Converter
Convert MP4 to MP3 online free.
Compress Video Online
Compress video online for free.
Video to GIF Converter
Convert video to GIF online free.
GIF to MP4 Converter
Convert GIF to MP4 online free.
FFmpeg in the browser: how it works
FFmpeg is the open-source engine behind most video software in the world. Convert Now loads a WebAssembly build of it (about 30 MB, downloaded once and cached) and runs it in a background thread. That means the same codecs the professionals use – H.264, AAC, MP3 – with none of the privacy trade-offs of an upload service.
What to expect on speed and size
Because encoding happens on your CPU rather than a server farm, it is best suited to clips up to a few hundred megabytes. Extracting audio is very fast; re-encoding video takes roughly real time on a modern laptop and longer on phones. If a video is very large, trim it or lower the resolution first.
Frequently asked questions
Why is the first conversion slower?
The video engine (≈30 MB) has to be downloaded the first time you use any video tool in a session. After that it is cached and starts instantly.
What formats can I import?
MP4, MOV, MKV, WebM, AVI, M4V and most other common containers, plus audio files for the MP3 extractor.
Is there a size limit?
We cap inputs at 300 MB per file to keep things responsive in the browser. For bigger files, compress or trim on a desktop first.
Will there be a watermark?
No. Output is clean, full quality, yours.
Does it work on mobile?
Yes, on recent iPhones and Android phones, though longer videos take more time than on a computer.