PNG vs JPG vs WebP vs AVIF: Which Format Should You Use?
There is no universally best image format: photographs, interface graphics, archives, and web pages have different requirements.
Read guide →Compress WebP
Re-encode WebP images with adjustable quality or convert them to JPEG, PNG, or AVIF in the browser.
Drop image(s) here or click to browse
Editor & live preview appear below once you add an image.
Reviewed 2026-07-10
About Compress WebP
WebP can represent lossy images and transparency. This tool decodes the source to pixels, then uses the selected output format and quality setting to create a new file.
All image processing stays on the device. Browser codec behaviour can differ slightly across platforms, and a large number of high-resolution images can exhaust the memory available to the tab.
Supported formats
- WebP
- JPEG
- PNG
- AVIF
How to use it
- Add WebP files. Select one or more images and keep the originals available for comparison.
- Tune the output. Keep WebP or select JPEG, PNG, or AVIF, then choose a quality level for a lossy target.
- Inspect before saving. Compare detail, transparency, colour, and file size, then download the preferred outputs.
Useful for
- Lower the quality of an oversized WebP photograph for web delivery.
- Convert WebP to JPEG for a system that does not accept WebP.
- Compare a WebP asset with an AVIF version using the same source pixels.
Limitations
- Re-encoding an already compressed WebP can introduce additional artefacts without producing a smaller file.
- The quality value is not a direct measure of visual quality or output bytes and may vary with browser encoding behaviour.
- Animated WebP is not preserved as animation by this pixel-based workflow.
Questions and answers
Will a lower quality always make a smaller file?
Usually for the same lossy format, but not as an absolute rule across different encoders or tiny files. Always check the generated result.
Can WebP preserve transparent pixels?
Yes. WebP supports alpha transparency, though you should inspect edge pixels after any lossy re-encode.
Does this change image dimensions?
No. This compression operation keeps the decoded width and height. Use Resize Image first when pixel dimensions can be reduced.
Related tools
Guides related to Compress WebP
How to Compress Images for the Web Without Visible Quality Loss
The best web-image optimisation combines right-sized pixels with a suitable format and a quality setting tested on real content.
Read guide →Image Compression vs Resizing vs Conversion
Compression changes representation, resizing changes pixel dimensions, and conversion changes the container or codec; each solves a different problem.
Read guide →