Free online converter
Compress Video for Web to a Tiny WebM or Animated WebP
MP4, MOV, WebM, GIF, JPG, PNG, WebP, HEIC, ZIP
Up to 100 MB free · 1 GB with Pro
HEIC, animated WebP input, PNG sequences and frame sequence export require Pro.
A raw MP4 straight off your phone or screen recorder can be heavy enough to drag a whole page down — too big to drop into a hero section, a product card, or an email without your visitors watching a spinner. LightBox compresses it into a web-native WebM or animated WebP that looks the same but weighs a fraction as much.
Drag your clip in, then decide how aggressive to be: resize to the width you'll actually display, trim down to the few seconds that matter, ease off the frame rate on slow-moving footage, drop audio you don't need, and slide the quality until the size feels right. Muted background loops, demo reels, and short explainers shrink especially well.
There's no app to install and no account to create — and never a watermark. Your upload is processed on the server and deleted automatically about an hour later, so a quick compression job leaves nothing behind.
Why convert with LightBox
Dramatically smaller, still sharp
WebM and animated WebP are built for the modern web, so they pack the same motion into far smaller files than a stock MP4 or an old GIF. Your page loads faster and your visitors stop waiting — without the smeary, washed-out look heavy compression usually leaves behind.
You control the trade-off
Compression is a balance, so LightBox hands you the dials instead of forcing one preset on every clip. Match the resolution to where the clip will actually live, cut the footage down to what matters, ease the frame rate back on calm shots, drop audio you won't use, and nudge the quality slider until the size feels right. Don't like a result? Re-export in seconds.
Web-ready in seconds, nothing left behind
Upload, compress, download — no signup, no software, and never a watermark. Files convert in seconds and are wiped from the server automatically about an hour later. A one-time Pro upgrade keeps yours permanently in a saved library with reusable presets.
Free forever. Pro when you need more.
Convert common formats free. Lifetime Pro adds more capacity and permanent hosting, with no subscription.
| Limit | Free | Lifetime Pro |
|---|---|---|
| File size | 100 MB | 1 GB |
| Per day | 4 files | Unlimited |
| Files kept | 1 hour | Forever |
| Batch | 1 file | 20 files |
| Queue | Standard | Priority |
50% off at launch · Paid once, yours for life. No recurring payments.
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