Bitrate and resolution control
Pick the output codec container, then set quality, resolution and frame rate instead of accepting one fixed preset.
Free video converter that never uploads your file
Convert MP4, MOV, MKV, WebM and AVI — or pull out MP3 audio, a GIF loop or a single frame. The encoder runs inside this tab on your own hardware, so there is no queue, no size paywall and no watermark.
Drop any file to begin
Images · Documents · Data · Audio · Video — processed locally in your browser
Tuned to your device
Worker threads and memory budgets are chosen from your CPU cores and available RAM, so long clips finish instead of freezing the tab.
Private by construction
No server ever receives the video. Close the tab and every trace of the job is gone.
Video converter FAQ
Is this video converter really free with no upload?
Yes. The video is decoded and re-encoded by FFmpeg compiled to WebAssembly inside your browser tab, so nothing is uploaded, there is no queue, no watermark and no sign-up.
Which video formats can I convert between?
MP4, WebM, MKV, MOV and AVI convert to each other, and any of them can become an animated GIF, an MP3/WAV audio track, or a still frame image.
Can I control quality and bitrate?
Yes. Each video target exposes options such as resolution, bitrate/quality and frame rate, and the app tunes worker threads to your device's CPU and memory so long clips stay stable.
How large a video can I convert in the browser?
It depends on your device. AllConverter detects available memory and CPU cores, warns you before a file is too heavy, and reduces parallelism instead of crashing the tab.
Popular next steps: MP4 to MP3 · MOV to MP4 · compress an image to an exact size