What actually makes video files big
Resolution, bitrate and duration multiply together. A one-minute 4K clip can outweigh a feature-length SD film.
Most sharing targets — WhatsApp, Telegram, email — don't need more than 720p–1080p at a moderate bitrate. That's where the big savings live.
Compressing in the browser, step by step
1. Drop your video into the tool — nothing uploads; it opens locally.
2. Pick a target quality or resolution. Lower resolution shrinks files fastest.
3. Preview, then export. The re-encoded file downloads instantly.
Settings that don't ruin quality
For chat apps: 720p is the sweet spot — sharp on phones, small enough to send.
For email: aim under 25 MB; trimming dead seconds off the ends often saves as much as re-encoding.
For archiving: keep the original and compress a copy — compression is one-way.