The Video Compressor reduces a clip's file size while keeping it watchable. Everything happens in your browser through WebCodecs, so source files chosen from your device never leave the page.
Why compress a video?
Smaller videos upload faster, embed cleanly in chat apps, attach to email, and stream more reliably on slow connections. Marketers, support teams, and creators all hit upload caps that a smaller MP4 walks past easily.
Step-by-step
- Upload a video from your device or paste a direct URL.
- Pick Basic mode for a quick target file size, or Advanced mode for full control over resolution, codec, bitrate, and frame rate.
- Adjust the resolution downscale; lower resolutions shrink the file fastest with the smallest perceived quality loss.
- Choose H.264 for universal playback, H.265 or AV1 for stronger compression on modern browsers.
- Optionally remove the audio track or strip metadata when sharing the video publicly.
- Click Compress Video, watch the progress bar, then download the result and compare it against the original preview.
Tips
- A target size that is much smaller than the source will force a low bitrate. If quality drops too far, raise the target size or step the resolution down instead.
- Speech-only clips compress much further when you drop the frame rate to 24 fps and choose a lower resolution.
- Re-encoding loses information. Compress once from the highest quality master rather than chaining multiple passes.
Frequently asked questions
- Are videos uploaded somewhere during compression?
- No. Files chosen from your device are decoded and re-encoded locally in your browser using WebCodecs. The tool only uses the network when you compress a remote URL.
- How is the target size achieved?
- The compressor estimates a video bitrate from your target size, video duration, and audio settings, then re-encodes the video using that bitrate. Real output may differ slightly because codecs adapt bitrate frame to frame.
- Why is the output bigger than I expected?
- Encoders honor a minimum quality floor for the chosen codec and resolution. Lower the resolution, drop the frame rate, or remove audio when you need a smaller file.
- Which codec gives the best compression?
- H.265 and AV1 produce smaller files than H.264 at the same quality, but they take longer to encode and need a modern browser. H.264 is the safest universal choice.
- Will compression hurt video quality?
- Compression always trades quality for size. Aim for the highest target size you can accept and avoid downscaling more than once between tools.