Convert PNG to WebP Online — Smaller Stills Without a Server
PNG screenshots are honest but heavy. WebP usually lands a much smaller still with the same pixels you see on screen, which helps a docs site or changelog load faster. This page does that encode locally: PNG in, WebP out, rename, download.
How it works
- 1Add your PNG file
- 2Convert to WebP in this browser tab
- 3Rename the result
- 4Download
When PNG → WebP is the right job
You are swapping PNG assets on a landing page and the Lighthouse image budget is already red.
A changelog or help article needs a screenshot that should not cost 2 MB per scroll.
How the conversion runs on this page
Upload PNGs, convert, then rename so production filenames stay predictable (hero.webp, not image.webp).
If an older CMS rejects WebP, convert back with Convert WebP to PNG on this site — still in the browser.
Quality, limits, and honesty
Browser WebP encode is lossy at the quality you set. For UI with tiny text, keep quality high or keep a PNG master beside the WebP you ship.
Animated PNG is not a separate pipeline here — you get a still from the bitmap the browser decoded.
Privacy
Your PNG file is decoded in this tab. We do not upload it to convert it to WebP.
If a related job is next — compress a PDF, flatten another image, or switch pairs — use the links on this page so the file stays on your device the whole way.
100% On-Device Privacy & Security Guarantee
Unlike traditional online tools that upload your files to external cloud servers, wikawe processes all files locally in your browser using WebAssembly. Your documents never leave your device, preventing leaks and protecting sensitive records.
wikawe vs. Traditional Cloud Converters (iLovePDF, Smallpdf)
| Comparison | wikawe | Cloud Converters |
|---|---|---|
| File Privacy | 100% On-Device (Zero Uploads) | Sent to remote cloud servers |
| Processing Speed | Instant (Client-Side) | Slow upload/download queues |
| Usage Limits | Unlimited tasks & files | Strict hourly rate limits |
| Registration | No account required | Requires paid subscription |
FAQ
Is WebP always smaller than PNG?+
Usually for photos and screenshots, yes. A tiny 16×16 icon can go either way. Convert once and compare the two file sizes on your disk.
Do I need a plugin to convert PNG to WebP?+
No. A current Chrome, Edge, Firefox, or Safari tab is enough. Nothing installs.
Are my PNGs uploaded to convert them?+
No. Encoding runs on-device in this tab.
Will transparency survive PNG to WebP?+
WebP can store alpha. What you get depends on how the browser encodes the canvas — if you need a guaranteed opaque still, use PNG to JPG instead.
Can I rename the WebP before download?+
Yes. Every conversion on wikawe shows a name field first so downloads stay organized.