Compress a video and reduce its file size
Make a large video small enough to send on WhatsApp, attach to an email or upload faster. Choose a smaller quality and a lower resolution, then download a new MP4. Your video is processed on your device and never uploaded.
How to compress a video
- 1
Open your video
Tap “Choose file” and pick an MP4, MOV or WebM video from your phone or computer. It stays on your device.
- 2
Pick quality and resolution
The “Export” tab opens with “Smaller file” and 720p already selected. For an even smaller file choose 480p; to keep more detail choose 1080p or “Balanced”.
- 3
Keep it as one video
“Full video” is selected under “Trim & split”, so you get one compressed file. You can also trim off parts you don't need, which makes the file smaller too.
- 4
Download the smaller file
Tap “Download” on the clip (or “Download all videos”). On a phone, tap “Save to gallery” to save it to Photos or your gallery.
How the file gets smaller
File size mostly depends on two things: how much detail is kept in each frame and how many pixels each frame has. “Smaller file” keeps less fine detail, and a lower resolution (720p or 480p) means fewer pixels. Using both together gives the biggest saving.
The video is re-encoded as an MP4 with H.264 video and AAC audio, which plays on almost every phone, computer and social app.
Which settings to choose
For sharing in chats or by email, 720p with “Smaller file” is a good start: it still looks clear on a phone screen. Choose 480p if the file needs to be as small as possible and will be watched on a phone. Keep “Original” or 1080p with “Balanced” when the video will be shown on a big screen.
Other ways to cut the size: trim off the start and end you don't need, or remove the sound with “Remove original sound” in the “Music” tab if you don't need audio.
Limits to know
You can't type an exact target size like 10 MB. The result depends on the video: fast motion and lots of detail compress less than a still, simple scene.
A video that is already small, low-resolution or heavily compressed may not get much smaller, and in rare cases re-encoding it can even make it a little bigger. If that happens, try 480p or keep the original file.
Compression happens on your device, so long videos take longer on phones. Very large files can fail if the browser runs out of memory.
Tips for smaller videos
- Try 720p first. Only drop to 480p if the file is still too big.
- Trimming 10 seconds off a long video saves size without lowering quality.
- Lower resolution never makes a video sharper, so keep your original file too.
- Exporting several settings is quick to compare: the editor keeps your video loaded, so you can change the resolution and download again.
Frequently asked questions
Open the video on this page in your browser, keep “Smaller file” and 720p selected in the “Export” tab, and tap “Download”. You get a new, smaller MP4 without installing anything.