Compress video files in bulk

Updated 28 September 2026

To make a video smaller, drop it on this page, keep the default quality of 28 and download the new MP4. The encoding runs on our servers in Germany, not in your browser.

Each file travels there over an encrypted connection. We delete the upload and the compressed copy automatically within two hours.

How to compress video files

1. Drop a clip, several clips or a whole folder onto the page (WebM, MKV, MOV, MP4, AVI, 3GP, WMV and other common formats are accepted).
2. Leave the quality at 28 or choose any value from 18 to 40.
3. Pick a maximum height of 1080, 720 or 480 if a smaller picture is fine, or keep the original size.
4. Start the job and download each MP4 separately or everything as one ZIP.

What the quality number means

The number is a CRF (constant rate factor) value. Rather than aiming at a fixed bitrate, CRF holds the visual quality steady, and the file ends up as large as the content requires. A lower number keeps more detail and makes a bigger file. A higher number makes a smaller file with more visible loss.

Some reference points help. 18 comes close to visually lossless. Around 23, the result is very hard to tell from the source. Our default of 28 suits sharing and web pages. Past roughly 30, blocky patches start to appear in dark scenes and during fast motion. Each 6 points you add roughly halves the size.

For an email attachment or a chat app, 28 is a sensible start. If that still leaves the file over the limit, add a height cap of 720.

Why some videos shrink more than others

The saving depends on the source. Detailed 4K phone footage with plenty of motion loses a lot of weight at 28. Screen captures, and clips that were squeezed for the web before, can change very little, and now and then the output is larger than the input. In that case, the original is the better file to keep.

For 4K clips, the height cap saves far more than the quality number on its own. Cap the height at 720 or 1080 and anything taller is scaled to fit with its proportions kept, while clips already below the cap stay at their own size.

Many clips at once

Video compression is a heavy job, so the free allowance is small. Without an account you get 3 videos a day, and a free account raises that to 5. Either way, each file can be up to 50 MB. Pro, at EUR 7.99 a month or EUR 59 a year, lifts the file limit to 500 MB, takes batches of up to 500 files and has no daily allowance. For one large job without a subscription, buy credits instead. One credit covers 25 files in a batch or pipeline, a pack of 20 costs EUR 4.99, and credits never expire.

A pipeline runs the same CRF over every clip in a folder and can chain other steps around it, for example resize to 720p, then compress, then rename. Pipelines are free to try on up to 3 files. When the run finishes, the results come back one by one or as a single ZIP.