Compress video files to a target size — email, social, or custom. 100% in-browser.
Upload a video and compress it to your target file size
Video compression runs entirely in your browser using ffmpeg.wasm. Your video file is never uploaded to any server.
About this tool
Compress video to a target file size for email, social or web. Browser-based, no upload. Free.
What Is the Video Compressor?
The Video Compressor is a free, browser-based tool that reduces video file size by re-encoding with H.264 video and AAC audio codecs at a lower bitrate. You can target a specific file size (useful for email attachments with size limits) or choose from preset quality levels. All processing happens locally in your browser — no upload, no signup.
How to Compress a Video
Drop your video into the tool. Select a preset (Email, Social Media, Web) or set a custom target size in MB. Click compress, and the tool re-encodes your video in real-time. Download the compressed MP4 file when done. Processing time depends on video length and your device's CPU — typically 30-60 seconds for a 1-minute video.
Frequently asked
Is this video compressor really free?
Yes, 100% free with no signup, no watermark, and no file limits. All compression happens in your browser using the WebCodecs API. Your video never leaves your device.
How does the target size compression work?
You set a target file size (e.g., 10 MB for email). The tool calculates the optimal bitrate to achieve that size, then re-encodes the video using H.264 video and AAC audio codecs. The output is a standard MP4 file playable everywhere.
What are the compression presets?
Four presets are available: Email (target ~10 MB, high compression), Social Media (target ~50 MB, medium compression), Web (target ~25 MB, balanced), and Custom (you set the exact target size in MB).
Will compression reduce video quality?
Yes, compression reduces quality — that's how file size is reduced. However, the tool uses modern H.264 encoding which maintains good visual quality even at high compression ratios. For best results, start with a high-quality source video.
Can I compress video to a specific target file size?
Yes. Set a target size (e.g., 25MB for email, 8MB for WhatsApp, 50MB for Discord) and the tool calculates the required bitrate automatically. It re-encodes using H.264 with adjustable resolution (downscale to 720p or 480p) and frame rate. A 200MB 1080p clip compresses to 25MB at 720p/30fps with acceptable quality.
How much quality is lost during compression?
Quality loss depends on the compression ratio. Reducing a 1080p video by 50% (e.g., 100MB to 50MB) is nearly imperceptible on mobile screens. An 80% reduction shows visible artifacts in fast-motion scenes. This tool shows a quality estimate before processing and lets you preview a 5-second sample before committing to the full encode.
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