Compress Video Online — Free Video Compressor

Shrink video files with presets optimized for WhatsApp, Email, or Web sharing.

How It Works

1Upload your video by dragging it into the drop zone or clicking to browse.
2Adjust the quality slider to balance file size and visual fidelity.
3Click Download to save your compressed video.

About Compress Video

Video files too large to share via email, messaging apps, or social media? Raw recordings and high-quality video files can easily be hundreds of megabytes or even gigabytes, far exceeding the limits of most sharing platforms. This tool offers smart compression presets optimized for common use cases: WhatsApp (720p resolution at approximately 1 Mbps, fitting within WhatsApp's file size limits), Email (480p at approximately 500 kbps, small enough for most email attachment limits), and Web (original resolution with balanced quality, ideal for uploading to websites or cloud storage). The tool re-encodes your video using the H.264 codec via FFmpeg.wasm, which is the industry standard for video compression — providing excellent visual quality at dramatically reduced file sizes. The compression typically reduces file size by 50-90% depending on the preset and source material. Everything runs in your browser via WebAssembly — no video files are uploaded to any server, ensuring complete privacy for personal videos, confidential meeting recordings, and proprietary product demos. Supports MP4, WebM, MOV, AVI, and MKV input formats.

From the blog

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Frequently Asked Questions

Which preset should I choose?

WhatsApp: optimized for mobile sharing (720p, ~1 Mbps). Email: small enough for email attachments (480p, ~500 kbps). Web: balanced quality for websites and social media (original resolution, higher bitrate).

How much smaller will my video get?

Results vary by content. Typical reductions: WhatsApp preset 60-80% smaller, Email preset 70-90% smaller, Web preset 30-60% smaller than the original.

Is there a file size limit?

The tool accepts files up to 100 MB. Larger files may cause the browser tab to run out of memory since all processing happens locally.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

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