Free online video compressor
Make any video smaller right in your browser. Nothing is uploaded, and you don't need an account.
Drop a video here
MP4, MOV, WebM, MKV · Up to 2 GB on a computer
Starting…
Runs on your device. Keep this tab open.
ChatCut opens in a new tab. Upload the compressed file there to trim it, add captions or resize it.
- Runs on your device
- No upload, no sign-up
- No watermark on your download
A compressor that never sees your file
Most online compressors upload your video to a server first. This one does the work in your browser.
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Stays on your device
The video is decoded and re-encoded inside this tab. It is never uploaded to ChatCut or anyone else.
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No sign-up
No account, no email, no trial. Open the page, pick a file, download the result.
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Aim for a size
Type the size you need in MB. We work out the bitrate from the video's length and aim just under it.
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Lower the resolution
Drop 4K to 1080p, 720p or 480p. On long videos, resolution saves more than any quality setting.
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MP4 that plays anywhere
You get an H.264 MP4 that plays on phones, browsers, Discord and email. Browsers without H.264 get WebM.
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Nothing stamped on it
The file you download from this page has nothing added to it: no logo, no end card, no watermark.
Fit the file to where it's going
Each place you send a video has its own size limit. Pick a target and the compressor works backward from it.
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Discord
Free accounts can send files up to 20 MB, Nitro Basic up to 50 MB and Nitro up to 1 GB. Set the target to 19 MB to leave a little room.
Limits from Discord's File Attachments FAQ, checked Nov 12, 2026.
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Email
Most email services stop attachments at around 20–25 MB, and encoding the attachment adds to its size. Aim for 15 MB or less, or send a link.
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Chat apps and uploads
Smaller files upload in a fraction of the time on Slack, WhatsApp, a CMS or a client portal, and preview sooner on the other end.
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Storage
Screen recordings and phone footage are often several times bigger than they need to be. Shrink the ones you're keeping.
How to compress a video
Three steps, all in this tab.
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Choose a video
Drop in an MP4, MOV, WebM or MKV. Up to 2 GB on a computer, 500 MB on a phone. It loads from your disk, not the internet.
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Choose how small
Pick Smaller file, Balanced or Better quality, or type a target size in MB. Lower the resolution if you need to go further.
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Compress and download
Watch the preview, check the new size against the original, and download the MP4. Keep the tab open until it finishes.
Need more than a smaller file?
ChatCut is an AI video editor. Trim the clip, add captions, resize it for TikTok or YouTube, then export.
Video compressor questions
Is this video compressor free?
Yes. It costs nothing, needs no account, and the file you download from this page has no watermark. The limit is 2 GB per file on a computer and 500 MB on a phone, because the whole job runs in your browser.
Is my video uploaded anywhere?
No. The page uses your browser's built-in video encoder (WebCodecs) to decode and re-encode the file on your own device. The video is never sent to ChatCut or anyone else, so it works on private footage too.
How do I compress a video to a specific size?
Switch to Target size and type the number of MB you need. We divide that budget by the video's length to set the bitrate and aim slightly under it. If the first pass comes out too big we run a second, tighter pass. The result usually lands close to the target, but it isn't exact, and a long video squeezed into a few MB may not get there; lowering the resolution helps.
How do I compress a video for Discord?
Discord lets free accounts send files up to 20 MB (since August 2026), Nitro Basic up to 50 MB, and Nitro up to 1 GB. Choose Target size and enter 19 MB for a free account. For clips longer than a couple of minutes, also pick 720p so the picture stays clean at that size.
Can I compress a video without losing quality?
Any compression throws away some detail, so there is no truly lossless way to make a video much smaller. Better quality keeps the loss hard to see. If the original is 4K, dropping to 1080p often saves more space than turning quality down, and looks better on most screens.
Which formats does it support?
It opens whatever your browser can decode, which usually means MP4, MOV, WebM and MKV with H.264, VP9 or AV1 video. HEVC (H.265) from iPhones opens in browsers that support it, such as Safari and recent Chrome on Mac and Windows. The output is an H.264 MP4 with AAC audio, or WebM when the browser can't encode H.264.
Does it work on iPhone and Android?
It works in recent Chrome and Edge, and in recent Safari, on computers and phones. On a phone the limit is 500 MB and long videos take a while, so keep the screen on and the tab open. If your browser can't encode video, the page tells you before you start.
Can I undo compression later?
No. Compression permanently removes detail, so a compressed file can't be turned back into the original. Keep the original until you're happy with the smaller copy.
