How to use
- Drop your file(s) into the box above — or click it to browse.
- Conversion starts immediately; the tabs switch to a different output format. Adjust the quality slider to re-encode instantly.
- Click Download on each finished file — or Download all (.zip) for a batch. Nothing was uploaded at any point.
Who actually needs JPG → WebP?
Mostly people who ship websites. Every major browser has supported WebP since 2020 (Safari 14 was the last holdout), and PageSpeed Insights explicitly flags "serve images in next-gen formats". Converting your JPG assets to WebP is one of the cheapest Core Web Vitals wins available — the pixels look the same, the transfer is a third smaller, and your Largest Contentful Paint lands earlier.
The size line shown on each converted file tells you exactly what you saved. Typical photos drop 25–35%; screenshots and graphics can drop more.
| JPG | WebP | |
|---|---|---|
| Size at equal quality | baseline | ~25–35% smaller |
| Transparency | No | Yes |
| Browser support | Universal | All modern browsers (2020+) |
| PageSpeed "next-gen" check | Flagged | Passes |
| Best for | Compatibility, print, email | Websites, apps, CDNs |
A note on double compression
Your JPG has already been through one lossy encoder, and WebP is a second one. At the quality level this tool uses (0.92), the stacking is visually negligible for web use — but it's still a copy of a copy. If you have the original RAW or PNG master, converting that to WebP gives a cleaner result than converting the JPG. This matters mostly for images with fine texture or subtle gradients.
When NOT to convert JPG to WebP
- Uploading to platforms that re-encode anyway (Instagram, Facebook, most CMS media pipelines) — they'll re-compress your upload regardless; feed them the highest-quality source you have.
- Email attachments and documents — old Outlook builds and some office software still won't preview WebP.
- Print workflows — print shops want JPG, TIFF or PDF; WebP will bounce.
- Safari users converting — Safari's canvas cannot encode WebP (it decodes fine). Use Chrome, Edge or Firefox for this particular conversion.