Compress a video to 25 MB
25 MB is Gmail's attachment cap and the default limit on a lot of upload forms. Target 24 MB so the last per cent of container overhead does not push you back over.
Compress a video to 25 MB
Pick a target and the bitrate is solved for you.
Choose a video or drop it here
Read by this page, never uploaded. MP4, MOV, MKV, WebM, AVI, WMV, FLV and more.
Resolution, frame rate, audio, codec
Nothing is uploaded
FFmpeg runs in this tab. Turn your Wi-Fi off after the page loads and it still works.
Hit an exact size
Say "under 25 MB" and the bitrate is solved for you, two-pass.
No account, no watermark
No sign-up, no email, no logo burned into your video.
No file-size cap
No 100 MB paywall. The only limit is your browser's memory, around 2 GB.
Where the 25 MB limit comes from
25 MB is Gmail's attachment cap, and because Gmail is the default mailbox for most of the world, it has become the default limit for upload forms, job applications, insurance claims, school portals and support tickets too. If a form does not say what its limit is, 25 MB is the safe guess.
This page targets 24 MB. Mail is MIME-encoded in transit, which inflates an attachment by about a third, and servers measure what arrives rather than what you picked. The margin matters more here than anywhere else on this site.
What fits in 24 MB
| Clip length | Total bitrate available | Realistic resolution |
|---|---|---|
| 30 seconds | ~6,500 kbps | 1080p, comfortably |
| 2 minutes | ~1,600 kbps | 1080p, fine for most footage |
| 5 minutes | ~650 kbps | 720p |
| 15 minutes | ~220 kbps | 480p, and it will show |
| 30 minutes+ | ~110 kbps | Send a link instead |
Those rows are the honest version of what every "compress to 25 MB" tool is doing behind a progress bar. Leave Resolution on Auto and this ladder is applied for you.
Two things worth checking before you send
The result card, not the tool's promise. It shows the real output size. If it came out over target — which short, high-motion clips occasionally do — retry at the corrected bitrate it offers.
Whether a link is better. If the tool tells you it needs 480p to fit, the honest answer is often that this video does not belong in an attachment. A Drive or iCloud link keeps the quality and sidesteps the limit entirely.
How it works
Pick your video
It is read straight from your disk by this page. No upload, no queue, no account.
Set the target size
Type a number, or use a preset that matches the real limit. The bitrate is solved from the clip’s length.
Compress in the tab
FFmpeg runs in WebAssembly on your own machine. The first run downloads a 31 MB engine, once per browser.
Download it
The result is handed back as a file. Nothing was sent anywhere, so there is nothing to delete afterwards.
Compress for a specific limit
Compress a video for email
Targets 20 MB by default.
Open the compressor →Compress a video for Discord
Targets 9 MB by default.
Open the compressor →Compress a video for WhatsApp
Targets 15 MB by default.
Open the compressor →Compress a video to 8 MB
Targets 7.5 MB by default.
Open the compressor →Compress an MP4
Quality-based, no target to pick.
Open the compressor →Compress a MOV file
Quality-based, no target to pick.
Open the compressor →Compress a video for Instagram
Quality-based, no target to pick.
Open the compressor →Reduce a video's file size
Quality-based, no target to pick.
Open the compressor →Compress a 4K video
Quality-based, no target to pick.
Open the compressor →Questions people actually ask
Short answers here, the full story in the guides.
Is my video uploaded to a server?
No. The compressor is FFmpeg compiled to WebAssembly and it runs inside this browser tab. Your file is read from disk by the page, processed in memory, and handed back to you as a download. You can load the page, disconnect from the internet, and compress anyway — which is the simplest proof there is.
Does compressing a video lose quality?
Yes, always — compression works by throwing information away. The honest question is whether you can see it. At a sensible bitrate for the resolution, most people cannot tell on a phone or laptop screen. Anyone promising "no quality loss" is describing the perception, not the file.
How do I compress a video to an exact size?
Switch the tool to Target size and type the number. It reads the clip's duration, subtracts the audio budget, solves for the video bitrate that fits, and encodes two-pass so the result lands under the target rather than near it.
Is there a file size limit?
No limit we impose, but a browser tab is bounded by WebAssembly's ~2 GB of memory, and a re-encode needs roughly three times the file's size free. Files up to a few hundred MB are comfortable. Above about 1 GB, the iPhone app is the better tool.
Is there a watermark?
No. No watermark, no logo, no intro frame, no account, and no upload cap to unlock by paying. The output is your video, compressed.
Which format should I compress to?
MP4 with H.264 video and AAC audio, unless you have a specific reason not to. It plays on effectively everything. H.265 gives you a smaller file at the same quality but encodes much slower here and is refused by some uploaders and older devices.
Compressing on a phone?
The iPhone app does this on the device, with the hardware encoder.