Your files stay with you
FFmpeg runs inside your browser. Nothing is uploaded, nothing is stored on a server.
Runs in your browser · nothing is uploaded
Compress MP4 Video
Shrink videos without sending them anywhere. Drop up to 10 files, pick how much to compress, and download MP4s that are a fraction of the size.
Drop videos here or click to choose
MP4, MOV, AVI, MKV… · up to 10 files · max 500 MB each
Your videos stay on this device. Nothing is sent anywhere.
Up to 10 files at once
Drop a whole batch, 500 MB each, and download the results one by one or as a .zip.
Fast where it can be
Streams are copied instead of re-encoded whenever the result allows it, so many jobs take seconds.
Free, no account
No sign-up, no limit on the number of files, no logo on your videos. Supported by a single ad.
More free video tools
All of them are 100% free to use for anyone, and run in your browser with the same engine and the same limits: up to 10 files, 500 MB each.
Resize video
1080p, 720p, square or vertical for Instagram and TikTok.
Remove audio
Strip the sound from a video in seconds, no re-encoding.
Stabilize video
Remove camera shake from phone, GoPro and drone footage.
Black & white video
Turn a colour video into grayscale for a vintage look.
MP4 to MP3
Extract the audio of a video as an MP3 file.
MOV to MP4
Convert MOV files to MP4 that plays everywhere.
MKV to MP4
Convert MKV files to MP4 that plays everywhere.
AVI to MP4
Convert AVI files to MP4 that plays everywhere.
WebM to MP4
Convert WebM files to MP4 that plays everywhere.
WMV to MP4
Convert WMV files to MP4 that plays everywhere.
FLV to MP4
Convert FLV files to MP4 that plays everywhere.
M4V to MP4
Convert M4V files to MP4 that plays everywhere.
MPEG to MP4
Convert MPEG files to MP4 that plays everywhere.
3GP to MP4
Convert 3GP files to MP4 that plays everywhere.
RM to MP4
Convert RM files to MP4 that plays everywhere.
Questions and answers
Which compression level should I pick?
Light keeps the resolution and only re-encodes more efficiently: typically 30–50 % smaller with no visible change. Balanced caps the picture at 1080p and tightens the encoder: usually 50–70 % smaller, fine for sharing and social networks. Strong goes down to 720p with lower audio bitrate: the smallest file, for messaging apps and email.
Why is my video not getting much smaller?
A video that was already compressed well, for example one exported from a phone at a sensible bitrate, has little left to squeeze at the same resolution. Pick Balanced or Strong to reduce the resolution too; that is where the big savings are.
What does it cost?
Nothing. You don't need to register, there is no quota and no watermark is added to your videos. A single small ad on the page keeps the site running.
Where do my videos go?
Nowhere. Everything runs on your computer or phone, right in your browser. The video never goes online, and we never see it. Close the tab, and nothing remains.
What are the limits?
Up to 10 files per batch and 500 MB per file across all tools. These limits keep browser memory in check; laptops handle them comfortably, but phones may struggle with larger files.
How long does it take?
Removing audio and most conversions finish in seconds. Compressing, resizing, stabilizing and black & white redraw every frame, so they take about as long as the clip itself for small videos and a few times longer for 1080p. Each file shows a percentage and the time left.