Video Compressor

What this does

Compress video to WebM — pick bitrate, pick resolution, keep it local.

Phone videos at 4K hit 250 MB per minute. Email and most chat apps reject them. Drop your video in, pick bitrate (lower = smaller), pick scale (smaller dimensions = much smaller file), download a compressed WebM. Runs in your browser — no upload. For huge files (500MB+), the in-browser approach has limits; recommend Handbrake instead.

How to compress a video

1. 1

   Drop your video

   MP4, MOV, WebM, MKV — any format your browser plays. File size and current format show automatically.

2. 2

   Pick bitrate + scale

   Bitrate controls quality vs. size — 1-2 Mbps for web sharing, 4-8 Mbps for higher quality. Scale lowers pixel count — 50% scale = 4x smaller dimensions on disk.

3. 3

   Compress and download

   Re-encoding takes about real-time (a 2-minute video takes ~2 minutes). The compressed WebM downloads, original is untouched.

When video compression matters

Video compression tips

1. 01

   Browser-based has limits — use Handbrake for big files

   In-browser compression maxes out around 200 MB source. Above that, install Handbrake (free, open-source) — it's GPU-accelerated and much faster.

2. 02

   Bitrate matters more than resolution

   Dropping 4K → 1080p saves 75% file size. Dropping bitrate from 4 Mbps → 1 Mbps saves another 75%. Combined: 95%+ savings with quality fine for most uses.

3. 03

   WebM isn't universal — convert if recipient needs MP4

   WebM plays in modern browsers but Apple devices may need conversion to MP4 for direct playback. If sharing with iPhone users, convert WebM → MP4 with Handbrake after.

4. 04

   Audio is usually the bottleneck for short videos

   For a 30-second clip, audio takes proportionally more space than for a long video. If the audio doesn't matter (silent demo), strip it during compression to save extra space.