Free online converter
JPG to WebP — smaller photos, sharper pages
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.
JPG is the default for photos on the web — and also one of the heaviest things on most pages. Converting JPG to WebP keeps the picture looking the same while cutting the file size dramatically, which is exactly what you want for product shots, galleries, blog images, and hero banners.
LightBox does the conversion server-side with FFmpeg. Drop in a JPG, set the quality, and resize or crop if you need to, then download a still WebP that's ready to drop straight into your site or CMS — no desktop app, no plugins, no fiddling with export settings.
It's free and anonymous: nothing to install and no account required. Your file is processed and then auto-deleted, and the WebP you get back is clean, full-resolution, and watermark-free.
Why convert with LightBox
The same photo, far smaller
WebP compresses photographic detail more efficiently than JPEG, so a JPG re-encoded as WebP comes out far smaller while looking the same to the eye. Push the quality slider exactly where you want it and watch the file size fall.
Built for page speed and SEO
Heavy JPGs are one of the most common reasons pages load slowly. Swapping them for WebP trims image weight, which helps Core Web Vitals, mobile load times, and the rankings that follow — without changing how the picture looks.
Free, private, no signup
Drop in a JPG and download a clean WebP in seconds — no account, no watermark, no catch. Files are processed server-side and auto-deleted within the hour. Need a whole folder done? A one-time Pro upgrade adds presets and batch conversion.
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.
14-day money-back guarantee · secure checkout by Paddle
Just need it today? A 24-hour pass is $5.
See everything Pro adds