About WebP
Google released WebP in 2010, deriving its lossy compression from the VP8 video codec. The pitch was simple: JPEG-quality photos in files typically 25–35% smaller — and it delivered. WebP also has a separate lossless mode that usually beats PNG, and unlike JPEG it supports alpha transparency in both modes. Today every modern browser displays it, and much of the web serves images as WebP by default.
That default is probably why you are here. Saving an image from the web often hands you a .webp file that older editors, photo viewers, and upload forms refuse to open. Convertmaxxing converts WebP to JPG or PNG for compatibility — and in the other direction, turns your JPEGs and PNGs into leaner WebP files for your own site. Everything runs in your browser; nothing is uploaded. Note that animated WebP is not supported here — this tool converts still images only.
Strengths
- Typically 25–35% smaller than JPEG at the same visual quality
- Both lossy and lossless compression in a single format
- Alpha transparency even in lossy mode — something JPEG cannot do
- Displayed natively by every modern browser
Limitations
- Older desktop software and some upload forms still reject it
- Animated WebP is not supported here — conversions are still-image only
- Edged out by AVIF and JPEG XL on pure compression efficiency