Make a video smaller before sending it

Start with the right video

1. Open Compress a video in Reduce file size or Audio & video. Choose your file, or start with the short synthetic sample containing sound.
2. Wait for validation. The filename, duration and resolution appear beside the preview. A silent video is valid and can be compressed.
3. Choose your priority and select Compress my video. Only one heavy audio or video operation can run at a time in this tab.

Which setting should I use?

Keep the resolution is useful for a screen recording with small text. The engine still re-encodes the video: keeping the pixel count does not mean keeping every original detail. Output is capped at 30 frames per second and dimensions are rounded to even values.

Make it smaller uses stronger compression and may fit the picture within 1280 × 720 pixels for landscape, 720 × 1280 for portrait, or 720 × 720 for square videos. Smaller videos are not enlarged. Proportions are preserved apart from tiny rounding to even dimensions; nothing is cropped.

The first audio track is re-encoded to AAC at 96 kbit/s. If your source contains several languages, only the first audio track is used: check that it is the language you intend to share. Output is an MP4 containing standard 8-bit H.264 video.

Check both file size and content

Compare the original size with the finished MP4. Watch a section with movement, a small-text area and the end of the clip. Listen to the sound too. The displayed percentage describes this particular copy, not guaranteed savings on your other videos.

An already efficient video can become larger. The tool explains this and leaves the original available in its preview; keeping that original may be the better choice. No exact target such as under 10 MB is promised. This tool does not trim the duration or edit a timeline.

After a successful conversion, changing the setting or importing another video marks the download as an older result. A refused import, cancellation or failed conversion does not replace the last working download. Save the right copy before closing the page or changing language.

Why might my video be refused?

A container and a codec are different things. MP4, MOV and M4V files are accepted with an H.264 video track; WebM can contain VP8 or VP9. Renaming a file does not change its codec. An HEVC phone video is not accepted just because its extension is .mov or .mp4: export an H.264 copy from your video software first.

Input is limited to 50 MiB, one minute, 1920 pixels on the longest side and 60 frames per second. A processing budget may refuse high-resolution clips sooner; output is limited to 64 MiB. HDR colours, transparency, non-standard bit depths, multichannel audio, multiple video tracks and offset audio/video starts are refused. These checks help avoid presenting a silent or poorly synchronised copy as a success.

Processing time and privacy

A recent computer is recommended. Detailed movement often takes more work than a mostly static screen recording. The engine is shared with audio extraction, weighs about 32 MB and loads on first import. That download can take time; connection speed does not determine subsequent local encoding speed.

This release was tested in Chromium on Linux. Real-phone performance and memory, Safari and Firefox remain unvalidated. Cancel stops the operation’s worker and keeps the last result available. A timeout gives an error without replacing that download.

Your video bytes are not uploaded to a processing server. The file stays in this browser and your original is not overwritten. Keep the source for another conversion; if you only need its sound, Extract audio from a video creates an MP3 separately.