Video Compressor

Reduce video file size instantly in your browser. No uploads needed — everything is processed locally.

Drop your video here or browse

MP4, MOV, AVI, WebM, MKV — no size limit (processed in browser)

FreeNo Cost

LocalBrowser

No LimitFile Size

How It Works

Upload your video
Choose quality and resolution
Download compressed file

Tips for Best Results

720p + Medium = great balance
480p for maximum compression
High quality for archiving

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Why Use Video Compressor

Massive Size Reduction

Compress videos by up to 90% while maintaining visual quality. Perfect for sharing, uploading and saving storage space.

No Upload Required

Your video never leaves your device. All compression runs locally in your browser using WebAssembly technology.

Quality Control

Choose between low, medium and high quality presets. Pick the resolution that fits your needs — from 480p to original.

No File Size Limit

Compress videos of any size — 100MB, 500MB or even 1GB. Since processing runs in your browser, there are no server upload limits.

Perfect For

Content Creators Social Media Web Developers Educators Mobile Users Email Attachments

Powered by FFmpeg.wasm

FFmpeg.wasm — Browser-Based Video Processing

Video Compressor uses FFmpeg compiled to WebAssembly, running entirely in your browser. This means your video files never leave your device — all compression happens locally with the same powerful engine used by professional video editors.

The H.264 encoder with configurable CRF (Constant Rate Factor) ensures optimal file size reduction while preserving visual quality. Combined with resolution downscaling, you can achieve dramatic size reductions perfect for sharing on social media, email or messaging apps.

Frequently Asked Questions

Video Compressor uses FFmpeg.wasm, a WebAssembly version of the industry-standard FFmpeg tool that runs entirely in your browser. When you select a video, it is processed locally on your device — the file never leaves your computer. The tool re-encodes the video with H.264 codec at your chosen quality level and resolution, producing a smaller MP4 file.

There is no upload limit since the video is processed locally in your browser. You can compress videos of any size — 100MB, 500MB, or even larger. However, very large files may take longer to process depending on your device performance and available RAM. For the best experience, we recommend closing other browser tabs when compressing very large videos.

Results vary depending on the source video, but typical compression ratios are 50-90% reduction. A 300MB video can often be compressed to under 50MB with 720p Medium settings while maintaining very watchable quality. Lowering the resolution (e.g., 480p) or quality (Low) will produce even smaller files.

No. The compression runs entirely in your browser using WebAssembly. Your video file stays on your device at all times. The only time data is sent to our server is if you explicitly click "Save to Gallery" to store the compressed result for later access — and that is completely optional.

Processing time depends on your device speed, video length and resolution. A 1-minute 1080p video typically compresses in 30-90 seconds. Longer videos or higher resolutions will take more time. A progress bar shows real-time completion percentage so you know exactly how long remains.

The compressed video is always output as MP4 (H.264 + AAC), which is the most universally compatible format. It plays on virtually all devices, platforms and social media sites including YouTube, Instagram, TikTok, WhatsApp and more.

Yes. You retain full rights to your video. Video Compressor simply reduces the file size — it does not add watermarks, branding or licensing restrictions. The compressed output is yours to use for any purpose.