Compress video on Windows
Works in Chrome, Edge and Firefox on a Windows PC
- Free to use
- Private
- No upload to the cloud
- No account needed
Compress a video
File
Compress
- Picture
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- Frame rate
- —
- Bitrate
- —
- Expected size
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Keep this tab open while it works.
This browser can’t compress video yet. It needs WebCodecs, which recent Chrome, Edge, Safari and Firefox on a computer have. Firefox on Android doesn’t. Try another browser, or use the photo compressor.
Short answer
To compress video on a Windows PC, open this page in Chrome, Edge or Firefox, choose the video and pick a size. The browser re-encodes it as an H.264 MP4 with AAC sound, on your computer, and nothing is uploaded to a server. The steps are the same on Windows 10 and Windows 11. The tool opens with Under 25 MB selected, which suits email. For another limit pick another size, or Balanced for a smaller file with no size target.
How to compress a video on Windows
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Open the page in Chrome, Edge or Firefox
Chrome, Edge and Firefox 130 or later all work. There is nothing to install and no account to make. The page loads its code once, and the video itself goes nowhere.
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Choose the video
Click Choose a video or drop the file on the page. MP4, MOV, WebM and MKV open. To compress an MP4 video on Windows, the file is read from your disk and stays there. If the browser cannot decode the format, which can happen with HEVC, the tool says so.
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Pick a size
Under 25 MB fits Gmail, Yahoo Mail and Outlook.com, Under 20 MB fits the Outlook app, iCloud Mail and Discord without Nitro, and Under 10 MB suits strict work email. Choose Custom size for a limit of your own, or Balanced when you just want a smaller file. The plan on screen shows the picture size, frame rate and expected size first.
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Compress and download
Press Compress video and keep the tab open while it works. If the result is over the target, the tool lowers the bitrate, then the resolution or frame rate, and runs again. Download the MP4 when it is ready. The original is not changed, and the new file holds only picture and sound, so it carries no watermark.
Video compressor for Windows 10 and 11: which browsers work
The tool works through WebCodecs, which lets the browser encode video itself, so it does not matter whether you compress video size on Windows 10 or on Windows 11. What matters is the browser. Chrome and Edge have WebCodecs, and Firefox has had it on computers since version 130. The browser must also be able to create H.264 video, and the tool tells you if it cannot.
| Browser on Windows | WebCodecs | What it means here |
|---|---|---|
| Chrome | 94 or later | The tool runs. |
| Microsoft Edge | Yes | The tool runs. |
| Firefox | 130 or later | The tool runs. Earlier Firefox versions cannot run it. |
Browser support from MDN Web Docs, checked 8 October 2026. Support changes, so the date shows when we last checked.
Questions about video on Windows
How to compress video on Windows 11?
To compress video on Windows 11, open this page in Chrome, Edge or Firefox, choose the video, keep the size or pick another one, and press Compress video. The smaller MP4 is made on your computer and you download it when it is done. Nothing is sent to a server.
How to compress an MP4 video on Windows 10?
In exactly the same way. The tool runs in the browser, so what counts is the browser and not the version of Windows. Chrome, Edge and Firefox 130 or later all work, and MP4, MOV, WebM and MKV files open. The result is always an MP4 with H.264 video and AAC sound.
How to compress a video on PC for email?
Choose the limit of your email service. Under 25 MB is for Gmail, Yahoo Mail and Outlook.com on the web, Under 20 MB for the Outlook app and iCloud Mail, and Under 10 MB for strict work email. The page compress video to 25 MB has the details.
How to compress a video on Windows laptop?
A laptop works like any other Windows PC. Keep the tab open while it works, because conversion happens on your device and a long video takes minutes. Nothing is uploaded to a server.
How to reduce video size on Windows 10?
Pick a smaller size, or Balanced. For a size target the tool works out how many bits per second the file can use. When that is small, it lowers the picture size, for example to 720p, instead of leaving a blocky picture. The plan shows the expected size before you start.
Can I compress video on PC without losing quality?
Not entirely, because every compression discards some detail. What you control is how much. Balanced keeps the picture at up to 1080p, and a larger size loses less than a smaller one. The page video compressor without losing quality explains how to keep the loss small.
Is there a free video compressor for PC with no download?
Yes, this one. It is free, needs no sign-up and no download, and sets no limit on the size of the file you start with. The limit is your computer’s memory. For other ways to use it, see the video compressor online.
Is my video uploaded when I compress it?
No. The video is converted in your browser, on your own computer, and is never sent to a server. Compression does cost some quality, so play the result before you download it.
On iPhone
Video Compressor: Metras
If you also have an iPhone, our iPhone app makes smaller copies of the videos in your library, right on the device. Choose 25 MB, 20 MB or 10 MB, or enter a size of your own, see the estimate before you start, and compare the copy with the original afterwards. Nothing is uploaded to a server, large batches run in the background with Premium, and your originals stay in Photos until you decide.
Coming soon to the App Store
