Is my media file uploaded?

No. The file is processed by ffmpeg running inside your browser. Only the ffmpeg engine itself is downloaded once; your media never leaves your device.

What can I convert or change?

Convert video (mp4, webm, gif) and audio (mp3, wav, ogg, m4a); trim by start/end time; resize and change speed; mute or set volume; extract the audio; pull frames as a ZIP; and turn a video into a GIF.

Is there a limit or a queue?

Large files take time because the work is local. There is a cancel button and honest progress, plus quality (CRF) presets and a before/after size comparison.

Media Converter

Trim and convert audio and video, or make a GIF — entirely in your browser.

Runs in your browser — nothing is uploaded

The ffmpeg engine is fetched from a CDN the first time you run an operation (about 30 MB, then cached by your browser). Your file is decoded in a sandbox inside this tab and is never uploaded.

Drop a video or audio file, or click to choose

MP4, WebM, MOV, MP3, WAV, OGG and more. Processing happens on your device.

What Media Converter does

Convert video (mp4, webm, gif) and audio (mp3, wav, ogg, m4a)
Trim by start/end time, and cancel a running job
Resize (even dimensions) and change playback speed
Mute, or set the volume, and extract the audio track
Extract frames as a ZIP
Video → GIF with fps, width, loop and dither options
Quality (CRF) presets, output-vs-input size and a preview

How to use it

01
Open the Media Converter.
02
Drop in an audio or video file and pick an operation.
03
Choose the output format plus any trim, resize, speed or quality options.
04
Run it (you can cancel), then preview and download. Your file never leaves your device.

Common questions

Is my media file uploaded?: No. The file is processed by ffmpeg running inside your browser. Only the ffmpeg engine itself is downloaded once; your media never leaves your device.
What can I convert or change?: Convert video (mp4, webm, gif) and audio (mp3, wav, ogg, m4a); trim by start/end time; resize and change speed; mute or set volume; extract the audio; pull frames as a ZIP; and turn a video into a GIF.
Is there a limit or a queue?: Large files take time because the work is local. There is a cancel button and honest progress, plus quality (CRF) presets and a before/after size comparison.

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