Compress WebP or convert it to JPG, privately
Many images saved from the web are WebP, and plenty of upload forms still don't accept it. The usual fix is a converter website, which means uploading the image somewhere first. Krisox compresses or converts WebP inside your browser, in the upload form itself.
Why it matters for WebP
Most online compressors and converters work by uploading your file to their servers, processing it there and sending a copy back. While it's there, it's covered by their privacy policy and retention rules, not yours, and it may pass through other companies' storage and networks.
A WebP you saved may look harmless, but it might be a photo of you, a product mock-up under NDA, or a client's artwork. It doesn't need to visit another server just to change format.
How Krisox compresses WebP
- Choose the WebP in any upload form.
- Krisox shows the resulting size at each level.
- Click "Upload compressed", or download a copy.
The three levels
- Extreme: at most 1,600 pixels on the longest side, strong compression. The smallest files.
- Recommended: at most 2,560 pixels, balanced compression. Sharp on any screen.
- Light: at most 4,096 pixels, gentle compression. The most detail, smaller savings.
When a site rejects WebP (Pro)
When a form's file picker only allows JPG or PNG, Krisox Pro converts the WebP automatically, and formats the site wouldn't accept are greyed out.
- WebP to JPG: accepted almost everywhere. Transparent areas become white.
- WebP to PNG: lossless and keeps transparency, but larger.
- WebP to PDF: a one-page PDF for document forms.
Check it yourself
- Open Chrome's developer tools (Cmd+Option+I on a Mac, Ctrl+Shift+I on Windows) and choose the Network tab.
- Upload a file on any site and let Krisox compress or convert it.
- You'll see the website's own upload, and no request from Krisox carrying your file: Krisox never sends files anywhere.
Without Krisox
- Mac: open the WebP in Preview and use File → Export to choose JPEG or PNG.
- Windows: open it in Paint and use Save as to choose JPEG or PNG.
Questions
Why do some sites reject WebP?
Their upload forms were built to accept a fixed list of types, often JPG and PNG only, even though browsers have supported WebP for years.
Does compressing WebP keep transparency?
Yes. Only converting to JPG removes it.
Is it free?
Compressing one file at a time is free. Converting between formats, and compressing several files at once, are part of Krisox Pro.
Krisox is a browser extension for Chrome. Compressing one file at a time is free; converting formats and compressing several files at once are part of Krisox Pro.