Compress WebP Images Online
Already using WebP? There is usually more to save.
Compress JPG, PNG, SVG, WebP images
Up to 10 images at a time, max 5 MB each
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Format is locked while images are being compressed
WebP is already an efficient format, so a WebP file is often assumed to be as small as it can get. In practice, most WebP images are produced by automated export pipelines at conservative default settings, leaving a substantial amount on the table. imgBoost re-encodes at a quality tuned for the web and removes metadata that survived the original conversion.
How WebP compression works
WebP supports both lossy and lossless modes, and which one your file uses makes a large difference to what can be recovered. Lossless WebP, typically produced when converting from PNG, behaves much like PNG: palette and encoding improvements can cut it significantly. Lossy WebP, produced from photographs, responds to quality tuning in the same way JPEG does. Many WebP files also carry colour profiles and metadata inherited from the source image, which serve no purpose in a browser.
Best uses for WebP
- Modern websites targeting current browsers
- Images that need transparency at a smaller size than PNG
- Photographs where JPEG is too large
- Replacing both PNG and JPEG with a single format
Things to know about WebP
WebP is supported in every current browser — Chrome, Firefox, Safari and Edge have all shipped it for years — so browser support is no longer a practical reason to avoid it. The genuine limitations are elsewhere: some older desktop software and email clients still will not open a WebP file, and a few social platforms prefer JPEG for uploads. Keep a JPEG or PNG original for anything that leaves the web.
WebP compression FAQs
Can a WebP file be compressed further?
Usually yes. Most WebP files come out of automated conversion pipelines at default quality settings that leave room for improvement, and many still carry metadata from the source image. Re-encoding at a web-appropriate quality commonly saves a further 20 to 40 percent.
Is transparency kept when compressing WebP?
Yes. WebP supports an alpha channel and imgBoost preserves it, including partial transparency and anti-aliased edges.
Do all browsers support WebP?
Yes. Chrome, Firefox, Edge and Safari have all supported WebP for several years, so you can serve it without a fallback for practically all web traffic. Non-browser software is where gaps remain.
Should I use WebP or AVIF?
AVIF produces smaller files than WebP, often substantially so, but has slightly narrower support and takes longer to encode. WebP is the safer default today; AVIF is worth it when image weight is your main performance bottleneck.