Video Compressor
Re-encode common video containers to a smaller MP4 in your browser.
Drop a video file to compress
Output: MP4 · re-encoded in your browser (first use loads the media engine)
No server upload — processed on your device
Computer · URL · cloud · drag & drop
Video Compressor by format
How to use this tool
Pick a format tool
Open a format-specific page below (for example MP4 Compressor) when you know the extension, or use the general video compressor on this page.
Add your file
Drop a file up to 100 MB. Compression stays in this tab — no third-party conversion queue.
Download the smaller file
Tune quality, then save the result locally when the size looks right.
Frequently Asked Questions
More on quality loss: conversion quality guides · compression guides
Is the video compressor free?
Yes. Format Convertly compresses files in your browser with no signup or watermark.
Do you upload my files?
No. Compression runs on your device. There is no server copy of your files.
Why are there format-specific pages?
Each tool accepts the right extensions and sets a sensible output — for example MP4 Compressor and MOV Compressor.
Does compressing video reduce quality?
Re-encoding can. Higher quality settings keep more detail at larger sizes. Keep the camera/NLE master when possible.
What is generational loss for video?
Damage from repeatedly re-encoding the same clip. Compress once from the best master for delivery.
How does video compression work?
Compressors re-encode frames (usually to MP4). Lower quality/bitrate shrinks files. See How video compression works and How bitrate affects file size.
Why did my compressed video look softer?
Lossy re-encoding discards detail for size. Raise the quality setting or start from a better master — explained in Why compressed files lose quality.
Where can I learn more about compression?
Browse Format Convertly’s Compression guides — what compression is, lossy vs lossless, image/video/audio how-tos, bitrate, and PDF size tips — each links back to the matching compressor.
Ready to convert more formats?
Browse converters or jump back to the tool above.