How Client-Side Image Format Conversion Works
Image Format Converter (PNG / WebP / JPG) runs entirely in your browser with JavaScript. There is no sign-up, and whatever you type or open here is processed on your device instead of being sent to a server.
Convert Images Between WebP, PNG, and JPG in Your Browser
Convert photos and graphics between modern WebP, lossless PNG, and universal JPEG formats directly in browser memory. All conversion algorithms execute 100% on-device using native browser Canvas APIs, keeping sensitive personal photos and commercial assets completely private. JPG and WebP files are saved at a fixed 92% quality, so they lose a little detail; choose PNG to avoid that compression.
Preserve Alpha Transparency for WebP and PNG
Converting between PNG and WebP keeps transparent backgrounds, which suits website logos, icons and sticker graphics; WebP files are often smaller than PNG, but a smaller file is not guaranteed.
Clean JPEG Conversion with White Background Fill
When converting transparent PNGs into standard JPEG (which does not support alpha channels), transparent areas fill cleanly with a solid white background rather than turning black.
Why processing in your browser matters
Many online tools upload your files or text to a server to process them. This one does the work on your computer or phone, so your data is not sent to us or stored anywhere else. That lowers the risk when you work with confidential material, although you should still follow your organisation's own rules. Read how this works in our Privacy Policy.
- No uploads: files are opened and saved on your device, so there is no upload or download wait.
- No account: nothing to sign up for or install.
- Free to use: no subscriptions or paywalls.