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Convert PNG to WEBP for a website
WEBP is a modern image format supported by every major browser since 2020. Compared to PNG it's usually 30–70% smaller at the same quality, keeps transparency, and shaves seconds off the Largest Contentful Paint on image-heavy pages.
For developers, designers, WordPress admins and store owners who want faster page loads and a better PageSpeed score.
Tool for this job
Open the PNG → WEBP converter
Bulk convert an entire folder of PNGs and download as a ZIP.
Step-by-step
- Open the PNG → WEBP converter above.
- Drop the PNG files in. Transparent backgrounds are preserved automatically.
- Pick a quality preset — 85% is the sweet spot for the web.
- Convert the batch. The tool shows the size saving next to each file.
- Download the ZIP and drop the .webp files into your site's images folder. Update the <img src="…"> paths to the new extension.
Common mistakes to avoid
- •Serving both a PNG and a WEBP with the same name — the browser cache can get confused. Change the file name or force a bust.
- •Forgetting the alt attribute after renaming. Accessibility and SEO both need it.
- •Setting WEBP quality above 95%. You lose the size benefit and rarely see the difference.
- •Uploading only in WEBP with no PNG fallback for very old browsers (IE11) — a <picture> element solves this if you still need to support them.
Format advice
For photos on a modern site, WEBP is almost always the right choice. For logos and icons, SVG is still smaller and infinitely scalable. AVIF is even smaller than WEBP but has slightly less universal browser support.
Privacy
Conversion runs in your browser using the Canvas API. No files are uploaded to any server.
Related tools & guides
Frequently asked questions
Do all browsers support WEBP?
Yes — every major browser has supported WEBP since 2020, including Safari on iOS 14+. Under 1% of live web traffic in 2025 comes from a browser that can't display it, and those users typically already tolerate broken images.
How much faster will my site be with WEBP?
It depends on how image-heavy the page is. A typical marketing page cuts total image weight 30–50%, which translates to a 0.3–1.5 second improvement in Largest Contentful Paint on 4G.
Will WEBP hurt image quality?
At 80–90% quality WEBP is visually indistinguishable from the PNG or JPG source on any normal screen. Below 70% you start seeing subtle smoothing on complex textures.
Does WEBP support transparency?
Yes. That's the main reason to convert PNG to WEBP rather than to JPG — you keep transparent backgrounds while getting much smaller files.
Is WEBP good for SEO?
Google explicitly recommends WEBP or AVIF for the Web Vitals ranking factor. Smaller images improve LCP, which is one of the three Core Web Vitals directly scored.
Ready to fix it?
Bulk convert an entire folder of PNGs and download as a ZIP.