Private by default
Files are read from your device and processed locally. There is no upload queue, cloud render, or account workspace.
Video Compressor Online for Smaller MP4 Files
Use this free video compressor to choose a percentage or target MB and save a smaller MP4 without uploading your video.
Compress video
The video compressor creates a new MP4 download.
Video compression target
Use percentage for an approximate reduction, or enter MB for a strict maximum file size.
%
10%55% · under 0 MB90%
Choose a video to begin.
The video compressor creates a new MP4 download.55% · under 0 MB
Compress video with no server upload
Your selected video is processed on your device, not sent to a compression server.
Compress by percentage or target MB
Choose roughly how small the MP4 should be. The compressor accepts smaller results instead of chasing an exact file size.
Load online, process locally
Keep a connection available to load the page and video engine. Local processing does not guarantee offline access.
Example targets
Video compressor size targets for everyday sharing
These are illustrative size goals, not measured results or platform limits. Your output depends on the clip's length, motion and starting quality.
Compress video now- 48 MB → 8 MB goal
Email attachments
Aim below a common attachment limit before sending a meeting recap, class recording, or quick walkthrough.
- 22 MB → 5 MB goal
Chat messages
Make a short clip easier to send in messaging apps while keeping it as an MP4.
- 118 MB → 24 MB goal
Social uploads
Compress MP4 before posting or transferring a landscape video from desktop to phone.
Size and quality
Choose a practical video compression target
Use a percentage when you want a lighter copy, or enter MB when you have a file-size limit. A 50% target aims for about half the original size; it does not mean half the picture quality.
Start with the file size limit you need
Pick a percentage that gives you a practical approximate size. If a form asks for 10 MB, aim a little under that limit. For email, leave extra room for the message and other attachments.
Check detail before sharing
Review moving scenes, faces and small text in the downloaded MP4. If they look soft or blocky, choose a larger target; aggressive reduction can also lower the output resolution.
Keep the original video
The video compressor creates a separate download. Keep your original for future edits and use it for each new attempt, rather than compressing an already-compressed copy again.
How to use the online video compressor
Select a file, set its output size, compress, then check the downloaded MP4 before sending it.
- 1
Choose a video file
This page accepts MP4, M4V, MOV, WebM and MKV. Select a file or try the sample first; the video must contain tracks your browser or the fallback engine can read.
- 2
Pick a percentage or target MB
Choose roughly what percentage of the original size you want, or type the target MB you need to stay under. The estimate updates before you run compression.
- 3
Compress in the browser
Keep the tab open while the video compressor processes your file. Encoding time depends on the clip and your device; the progress indicator shows when the download is ready.
- 4
Download the smaller MP4
Save the MP4 and check its size, picture and sound. If it is still too large, return to the original and lower the target.
Email attachments
Compress MP4 before attaching it to email without uploading private footage to a third-party queue.
Upload forms
Meet school, hiring, support, or government form limits that reject large video uploads.
Chat and messaging
Shrink screen recordings, camera clips, and quick edits before sending them in a chat thread.
Mobile storage
Make a smaller file before moving a video to a phone or saving it in limited cloud storage.
Compress video to a specific size
Enter any MB limit, or choose a 20MB, 25MB, 50MB, or 100MB preset.
20 MB · 25 MB · 50 MB · 100 MB
Free video compression, without an account
Compress video for email, forms, chat apps, social uploads, or storage limits without creating an account.
Compress by percentage or MB
Pick a percentage or type a target MB instead of guessing encoder settings. The compressor adjusts bitrate and avoids extra passes once the file is small enough.
H.264 MP4 output
Download an MP4 with H.264 video. Check picture and sound in the app where you plan to share it.
Download immediately
When compression finishes, save the smaller MP4 directly from your browser.
Video compressor questions
Short answers about privacy, target sizes, output percentage, and browser limits.
No. The video compressor reads and encodes your selected file locally, using browser media support or a fallback engine. Loading the website and engine requires network requests, but those requests do not upload your video.
The homepage accepts MP4, M4V, MOV, WebM and MKV, and exports MP4. A file extension alone does not guarantee compatibility: the video and audio codecs inside must be readable. If one file fails, try the sample to check whether the compressor works in your browser.
No. The percentage or MB value is an approximate maximum, not an exact target. If the file becomes smaller than that, the tool finishes instead of spending time on extra passes.
Enter 10 or 25 in target MB mode, with a little space below any strict upload limit. Whether a usable result fits depends on duration and detail: a short clip has more room per second than a long recording at the same target. Check the final download size.
Yes. This MP4 compressor is free to use on this page and does not require an account. Pick a percentage or target MB; the tool automatically uses fast local encoding.
Large files can work, but this browser video compressor depends on your device memory, CPU, and browser limits. If a video is very long, start with a realistic percentage and keep the tab open until the download is ready.
Long recordings and detailed motion need more data than short, simple clips. Try a smaller target from the original file. If the result becomes hard to watch, shorten the video in an editor first or share a link instead of forcing it into a tiny attachment.
Try a short clip or the sample in your phone's browser first. Support depends on the browser, codecs and available memory. Keep the tab open during compression; if a large recording fails on mobile, try it on a desktop.
Do not rely on reopening the video compressor offline. The page and encoding resources may need a connection, even though the video itself is processed locally. Keep the current tab open and a connection available until your download is ready.
Yes, smaller video files usually mean less detail or lower resolution. The tool uses fast settings by default, so choose a realistic target rather than an extremely small one if quality matters.
Use an up-to-date browser and try the sample before a large recording. Available video codecs vary across browsers and devices. If a file cannot be decoded or the tab runs out of memory, try a different browser or a shorter source video.
Compress video without uploading it
Choose your video, set a size target, and save an MP4 for sharing.