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TinyTools

Video Compressor

Make a video small enough to send.

Everything is processed on your device. Nothing you upload or type is sent to a server, and nothing is stored.

Video Compressor online

Video is the one thing browsers were genuinely bad at until recently. Compressing a clip meant uploading it somewhere and waiting, or downloading tens of megabytes of software into the page first. This tool uses WebCodecs instead — the same hardware video encoder your phone's camera app uses — so the work happens on your device, at a speed that makes it worth doing. Nothing is uploaded, and there is no queue.

How to use video compressor

  1. Upload your video

    Drag in an MP4, MOV, WebM or MKV file, or click to choose one.

  2. Pick a quality and resolution

    Balanced suits most sharing. Scaling the resolution down saves far more than quality alone — only sizes smaller than your video are offered, since upscaling adds bytes without adding detail.

  3. Compress

    Your device re-encodes the video. A minute of footage typically takes a few seconds, though this depends on your hardware.

  4. Download

    Compare the original and new sizes, then download.

Frequently asked questions

How much smaller will my video get?

Usually 40–80% at Balanced, without a change most people would notice on a phone screen. The single biggest saving is resolution: a 4K clip dropped to 1080p is already around a quarter of the pixels, before any quality setting is applied. If your video is going to be watched on a phone or in a messaging app, 720p is almost always plenty.

Why is this so much faster than other online video compressors?

Most of them upload your file to a server, wait in a queue, process it and send it back. This one uses WebCodecs, a browser feature that gives a web page direct access to the video encoder built into your device's chip — the same one that records video in the camera app. There is no upload, no queue, and the encoding itself is hardware-accelerated.

Will compressing make my video blurry?

At High, the change is hard to see even side by side. At Balanced, fine detail in fast motion softens slightly, which is the trade that buys most of the size saving. Small is genuinely lossy and is meant for when a size limit matters more than looks. Reducing the resolution is usually a better lever than reducing quality: a sharp 720p video looks better than a heavily compressed 1080p one of the same size.

Which formats can I compress?

MP4, MOV, WebM and MKV all work, along with the codecs inside them that your browser can decode — typically H.264, HEVC, VP8, VP9 and AV1. If your browser cannot decode a particular file, the tool tells you rather than failing part-way through.

Is there a size or length limit?

No limit is set by us, but the video is held in your device's memory while it is processed. Files up to around 500 MB are usually comfortable on a desktop computer. On a phone, keep clips to a few minutes.

Is my video uploaded anywhere?

No. It never leaves your device — that is the direct consequence of doing the work in your browser rather than on a server. It disappears from memory when you close or reload the page.

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