Browser-based video compression

Free Online Video Compressor

Reduce video file size for sharing, upload limits, presentations and websites. LessMB runs video compression in your browser so clips do not need to be sent to a remote server.

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Drag your video here or click to compress

Compress MP4, MOV, and WebM inputs to stable MP4 output up to 2GB without installing software.

How it works

Free Online Video Compressor for private browser workflows

Compress MP4, MOV and WebM files

Upload a supported video file and create an optimized MP4 output for broad compatibility across websites, messaging apps, presentations and social platforms.

Tune resolution, bitrate and quality

Use standard settings for quick results or advanced controls for resolution, FPS, bitrate and CRF. Lowering resolution and bitrate usually gives the largest file-size savings.

No cloud upload required

The video is processed locally by browser workers. Compression time depends on your device performance, video length, source resolution and memory availability.

Common use cases

Make product walkthroughs and tutorials smaller before sharing with clients or teammates.

Screen recordings

Reduce short clips so they fit platform limits while keeping a practical MP4 format.

Social uploads

Shrink embedded videos before adding them to decks, forms or shared drives.

Presentations

Related guides

iPhone video compression

How to Compress a Video on iPhone

If an iPhone video is too large for email, chat, forms or shared drives, you can reduce its file size directly in Safari. LessMB runs video compression in the browser, so the clip stays on your device during the session.

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Email video compression

How to Compress a Video for Email

Email attachment limits are often much smaller than modern phone or screen-recording videos. LessMB can reduce video size locally and export a practical MP4 for sharing.

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Video storage FAQ

Does Google Drive Compress Video?

Google Drive stores your uploaded video file, but preview playback may use processed versions. If your goal is a smaller file for upload or sharing, compress the video before sending it to Drive.

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FAQ

Free Online Video Compressor FAQ

Answers for the most common questions about this compressor, supported workflows, and local browser processing.

No uploadFree toolBrowser-based
Can I compress a video online without uploading it?

Yes. LessMB processes supported video files locally in the browser instead of uploading them to a server.

What settings reduce video size the most?

Lower resolution, lower bitrate, lower FPS and a higher CRF value usually reduce video size the most, though each also affects visual quality.

Why does video compression take time?

Video compression is CPU and memory intensive. Large 4K files, long clips and older devices can take much longer than small 720p clips.

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