WebP · AVIF · WebM · MP4 · GIF · Frame sequence
Free WebP, AVIF & WebM converter for video and images
Make your videos and images web-ready. Convert MP4, MOV, WebM, GIF, JPG and PNG into animated WebP, AVIF, WebM, an optimized GIF or a frame sequence — ready in seconds.
Drop in a video or image — or click to browse.
WebP or WebM. Sensible defaults are ready to go.
Get a far smaller file in seconds. Done.
Why use LightBox
The modern replacement for GIF
Animated WebP looks sharper and weighs far less than a GIF, so your loops load fast and stay crisp. Drop in a video and get a web-ready animation back in seconds.
Free, no signup, no watermark
The converter is completely free and anonymous — no account, no email, and never a watermark stamped on your files. Just upload, convert, and download.
Real control over the output
Tune quality, fps, trim, crop, resize, loop count and audio, or use the frame-picker to grab a single still. Get exactly the file you need, not a one-size-fits-all export.
Your files stay private
Everything is processed on our server and auto-deleted within about an hour — nothing is kept, shared, or watermarked. Upgrade to Pro if you want a permanent library.
Free forever. Pro when you need more.
Everything on this page stays free. Pro adds this — once, no subscription, ever:
- 1 GB uploads, no daily limit
- Batch convert + saved presets
- Permanent library, priority processing
Loved by people who convert
Free and Pro users, real files, real deadlines.
I needed to shrink a video for a Discord upload and every tool I tried either watermarked the output or wanted my email address. LightBox just let me drop the file in, trim the part I needed, and download a WebM that actually fit under the size limit. No signup, no nonsense.
SarahFree userI run a small e-commerce shop and convert dozens of product clips into animated WebPs every week. Once I hit the free tier's limits I upgraded, and having a saved library of presets (one for hero banners, one for thumbnails) turned a five-minute fiddly task into a two-click job. Worth it just for the time back.
MarcusPro userFound LightBox through a random search when I wanted to turn a short screen recording into a looping WebP for a README. The crop and fps controls were more precise than I expected from a free tool, and it didn't try to upsell me halfway through.
AnaFree userWhat sold me on Pro wasn't a single killer feature, it was not having to redo my settings every time. I convert a lot of animation reference clips and having presets saved to my account means I open LightBox, pick a preset, upload, done. The frame-picker for choosing a poster frame is also just genuinely well built.
DevonPro user