How much smaller will my video be?

It depends on the original. Phone videos, which are recorded at a high bitrate, usually shrink by 50–80% at medium quality. Videos that are already compressed shrink less.

Which quality should I choose?

High keeps nearly all the detail with a moderate saving. Medium is the best balance for messaging and social media. Low gives the smallest file, but you will notice it on large screens.

Why does it take a while?

Video is re-encoded on your own device with FFmpeg compiled to WebAssembly. It is slower than a server, but your video is never uploaded. A one-minute clip usually takes a few minutes.

What is the maximum size?

Up to 500 MB. Very long videos need a lot of memory in the browser: if it fails, try a shorter clip or a computer instead of a phone.

Yes. The video is encoded in H.264 and the audio in AAC, the most compatible combination for phones, browsers and social networks.

Are my files uploaded to a server?

No. Everything is processed inside your browser and your files never leave your device. There is no upload, no queue and no temporary storage, so the tool keeps working even if you go offline after the page has loaded.

Yes. There is no sign-up, no watermark and no daily limit. The site is funded by a few unobtrusive ads around the tools, never inside your files.

Compress video

Upload an MP4 or WebM video, choose a quality level and download a smaller MP4. Medium quality usually cuts the size by half or more with little visible difference. Processing happens in your browser.

Free, no sign-up and no uploads: processing happens in your browser · Updated September 18, 2026

Upload your video (MP4 or WebM)

Drag here or click · MP4, WebM, MOV · Max. 500 MB

You can also paste a copied video with Ctrl+V

Why compress a video

Messaging apps, email and forms limit attachment size, and phones record at bitrates far higher than needed for a screen. Lowering the bitrate cuts the size drastically while keeping the resolution. If you only need the sound, Video to MP3 gives you a much smaller file.

The first time

The first time, the video processor (about 30 MB) is downloaded; after that it loads from your browser’s cache. Other formats, such as MOV from an iPhone, can be turned into MP4 first with MOV to MP4.

Related tools

MOV to MP4

Convert iPhone and QuickTime MOV videos to MP4.

Video to GIF

Turn a video clip into an animated GIF.

Video to MP3

Extract the audio from any video as MP3.

Frequently asked questions

How much smaller will my video be?: It depends on the original. Phone videos, which are recorded at a high bitrate, usually shrink by 50–80% at medium quality. Videos that are already compressed shrink less.
Which quality should I choose?: High keeps nearly all the detail with a moderate saving. Medium is the best balance for messaging and social media. Low gives the smallest file, but you will notice it on large screens.
Why does it take a while?: Video is re-encoded on your own device with FFmpeg compiled to WebAssembly. It is slower than a server, but your video is never uploaded. A one-minute clip usually takes a few minutes.
What is the maximum size?: Up to 500 MB. Very long videos need a lot of memory in the browser: if it fails, try a shorter clip or a computer instead of a phone.
Is the audio kept?: Yes. The video is encoded in H.264 and the audio in AAC, the most compatible combination for phones, browsers and social networks.
Are my files uploaded to a server?: No. Everything is processed inside your browser and your files never leave your device. There is no upload, no queue and no temporary storage, so the tool keeps working even if you go offline after the page has loaded.
Is it really free?: Yes. There is no sign-up, no watermark and no daily limit. The site is funded by a few unobtrusive ads around the tools, never inside your files.