About the Video Compressor
Phone videos are big: a minute of 4K can be several hundred megabytes, far too much for email, WhatsApp, Discord or many upload forms. This compressor makes videos smaller right in your browser. Choose how strongly to compress and, if you like, a lower resolution such as 720p, and it re-encodes the video into an MP4 that plays everywhere. You see the new size and a preview before you download. Nothing is uploaded, so it is private and there is no file size limit set by a server.
Updated October 2026
How to use the Video Compressor
- 1Select a video from your phone or computer.
- 2Choose the compression level; Balanced is a good start.
- 3Choose a resolution; 720p suits most sharing.
- 4Press Compress video and wait for the progress bar.
- 5Play the preview, check the size and download the MP4.
Choosing settings
Resolution has the biggest effect on size, then the compression level. A phone screen shows 720p sharply, so it is the best size for sharing.
- Light: for videos you'll keep or edit
- Balanced: everyday sharing
- Strong: email and slow connections
- Maximum: when only a small file will do
How it works without uploading
Your browser has a built-in video engine (WebCodecs) that phones and computers use to play and record video. This tool uses it through Mediabunny, an open-source media library, to read your file, change it and write a new one, all inside the page. Speed depends on your device: a recent phone or laptop handles a few minutes of HD video comfortably, while long 4K files take longer.
Why videos are so large
Modern phones record at high bitrates so you can edit and zoom later. A 1080p phone video can use 15 to 20 megabits per second, while streaming services deliver 1080p at about 5. Re-encoding at a sensible bitrate removes that extra headroom.
Tips for the smallest files
Trim the clip first so you only compress what you need, remove the sound if it isn't needed, and pick 480p for long screen recordings of slides or text-light content.
Checking the result before you send it
The preview plays the compressed video in the page, and the line above it shows the new size and how much smaller it is. Watch a few seconds with movement, such as people walking or a panning shot, because that is where compression shows first. If it looks blocky, go back one step: choose a lighter level or a higher resolution and compress again.
Phone and computer
On phones, pick the video from your gallery or files. Keep the screen on while it works; some phones pause pages in the background. Compression is just one step of editing a video. Cut it first with Trim Video, change the frame size with Resize Video, and remove sound using Mute Video.
Features
- Four compression levels
- Optional lower resolution: 1080p, 720p, 480p or 360p
- MP4 output that plays everywhere
- Preview before downloading
- No upload, no watermark
- Works on phones and computers
Frequently asked questions
How much smaller will my video be?
Typically 50 to 90% smaller. Lowering 4K or 1080p to 720p with Balanced compression often turns a 100 MB phone clip into 10 to 20 MB.
Will the quality drop?
Some detail is lost, as with any compression. Light and Balanced keep videos looking good on phones; Strong and Maximum are for when size matters most.
What size should I choose for WhatsApp or email?
WhatsApp handles up to 2 GB but sends faster when small; 720p Balanced is ideal. Email attachments are usually limited to 20–25 MB, so use 480p or Strong compression for longer clips.
Does it keep the sound?
Yes. The sound is kept and compressed lightly.
Which browsers work best?
Chrome and Edge on computers and Android support the most video formats. Safari 16.4+ and recent Firefox work too, but some codecs, such as HEVC in Firefox, may not be supported there.
Is my video uploaded?
No. It is processed on your own device with your browser's built-in video engine, so private videos never leave your phone or computer.
How long does it take?
Roughly as long as the video plays, sometimes faster on a good computer. Keep the tab open until it finishes.