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Video Compressor – Reduce Video File Size Online (MP4)

Compress videos for WhatsApp, email and uploads. Reduce MP4, MOV and MKV file size with smart presets, in your browser with no upload and no watermark.

  • Free, no sign-up
  • Runs in your browser, nothing uploaded

About the Video Compressor

Make large videos small enough to send or upload. Pick a preset, from smallest file to high quality, and the video is re-encoded to an efficient MP4 on your own device, without uploading it anywhere.

Key features

  • Three presets, from smallest to high quality
  • Efficient H.264 MP4 output
  • Never enlarges the video
  • Optional sound removal
  • Shows the size saved
  • No upload, no watermark

Make videos small enough to send

Phones record video at a much higher quality than you need for sharing, so a 1-minute clip can easily be 100 MB or more. Compressing re-encodes it into an efficient MP4 that looks almost the same on a phone and is a fraction of the size.

Size limits to aim for

WhereTypical limit
Email (Gmail, Outlook)about 20–25 MB attachments
WhatsApp video messagesmall videos only; send big files as a document
Job and university portalsoften 10–100 MB
Discord (free)about 10 MB

Limits change from time to time, so check the service if you're close to the edge.

Tips for the smallest files

  • Trim off anything you don't need first: length matters most.
  • Remove the sound if it's just background noise.
  • Choose the Smallest preset for clips that will only be watched on phones.

Trim video, video converter and mute video.

How to use the Video Compressor

  1. Drop your file into the box, or click to choose one.
  2. Choose the options you want; the defaults suit most files.
  3. Click the button. The first time, the media engine (about a 9 MB download) loads once and is then cached.
  4. Wait for the progress bar, preview the result and download it. Your file never leaves your device.

Frequently asked questions

How much smaller will my video get?

Phone videos are recorded at a high bitrate, so they often shrink by 60–90% with the balanced preset while still looking good on a phone screen. Videos that are already compressed shrink less.

Which preset should I pick?

Balanced (720p) suits WhatsApp, email and most uploads. Choose Smallest (480p) for strict size limits, and High quality if the video will be watched on a big screen.

Why is compression slow?

Compressing means re-encoding every frame, and your browser does it without a graphics card's help. Expect roughly one to five minutes per minute of HD video on a laptop. Keep the tab open until it finishes.

My video is still too big. What can I do?

Use the Smallest preset, remove the sound if it isn't needed, or cut the video shorter with Trim Video first. Length is the biggest factor in file size.

Are my videos uploaded?

No. Every tool runs in your browser using ffmpeg.wasm and your browser's own recording features. Your files never leave your device, which also means there's no upload wait.

Why does the first conversion take longer?

The first time you use a conversion tool, your browser downloads the media engine (about 9 MB). It's then cached, so later conversions start straight away.

How big can files be?

Up to 1 GB. Processing speed depends on your computer: short clips take seconds, while long HD videos can take several minutes. A desktop browser is faster than a phone.

Is there a watermark or time limit?

No watermarks, no sign-up and no limits on how many files you process.

Last updated:

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