Conversion runs in your browser. Files stay on your device.
Drop video files here or click to browse
Files queue into the current batch until you convert · MP4, MOV, MKV, WebM, M4V
Many online converters process files on remote servers rather than locally in the browser. The file lives on someone else's machine for the duration of the job, sits in their object storage while their retention policy ticks down, and shows up in their access logs. For casual home video that is usually fine. For internal work clips, footage you would rather not hand to a third party, or anything you would prefer to keep on your own machine, sending it to a stranger's server is something to consider.
This tool was built so the model is structurally simpler: there is no server-side upload endpoint for video at all. The site never receives the file in the first place. Conversion runs in your browser via the WebCodecs API, on your own device.
You can verify this in about 10 seconds: open your browser DevTools network tab, run a conversion, and observe that no outbound request carries the file. The page itself is just static HTML, CSS, and JavaScript.
There is no /api/upload, no presigned S3 URL, no multipart POST handler in the backend that accepts video bytes. The site is served as static assets; the encoder runs in the browser only.
Open your browser DevTools, switch to the Network tab, filter to 'media' or 'XHR', and run a conversion. You will see no request body containing your video. The only network traffic is for the page assets themselves.
Vercel Analytics records anonymized page views. There is no per-job logging, no upload log, and no retention policy for files because there is nothing to retain.
The bytes never reach a server, but your organization may still require approved tooling for sensitive material. This page is not legal advice. Talk to your IT or compliance team if you have a specific policy to follow.
Loading the page (HTML, CSS, JavaScript) involves your browser, your network, and the CDN, same as any website. The video bytes are what stays local.
Run a full video conversion locally in your browser, without uploading the video to a conversion server.
Drag and drop your video files into the converter, or click to pick them.
Pick the output format, quality, optional width, and whether to remove audio.
Click Convert files. Each file is processed locally on your device.
Download files individually, or grab the whole batch as a ZIP.
No. There is no upload endpoint for video on this site. Files are processed in your browser via WebCodecs and stay on your device.
Open your browser's DevTools network tab and filter by media or XHR while you run a conversion. You should not see a request body containing your file. The only network traffic should be for static page assets.
For many privacy-conscious workflows, yes; the bytes do not leave your device. For anything covered by a specific organizational policy, treat this page as one option to evaluate, not a compliance promise.
Vercel may briefly process your IP for abuse prevention on page load, the same way any web host does. It is not associated with the contents of any file because no file is sent.
Conversion requires WebCodecs video encoding and decoding, but each browser and device supports a different codec subset. MP4, MOV, and MKV output use H.264 video with AAC audio; Firefox and desktop Linux browsers do not natively encode AAC. Safari 16.4 added video WebCodecs, while Safari 26 added audio encoding and decoding. WebM output uses VP9 with Opus and may work where AAC output does not. For the widest support, use a recent desktop Chrome or Edge release, or Safari 26+. The converter still validates the actual source and output codec configuration when a job starts.
Sources: MDN: WebCodecs API · MDN: WebCodecs codec selection · WebKit: WebCodecs video support in Safari 16.4 · WebKit: WebCodecs audio support in Safari 26 · Mediabunny: supported formats and codecs · Reviewed 2026-10-12
For multi-GB clips, slow connections, metered networks, and offline work. Skip the upload step entirely.
The browser runs the encoder directly, so there is no upload to a server.
Drop in a folder of mixed-format videos. Pick one destination format. Download the whole batch.
Drop in MOV files, including HEVC iPhone clips, and get MP4s back in one pass.