Convert PNG to WebP
WebP compresses the same image dramatically smaller than PNG — typically 60–90% smaller for photos and screenshots — while keeping full alpha transparency. If your site still serves PNGs, this is the safest first optimization I know.
Need the other direction? Convert WebP to PNG
How it works
Drop PNG files onto the tool — screenshots, logos, UI exports — or paste them straight from the clipboard; several at once is fine.
Watch the per-file readout: at the default quality 80, photographic PNGs typically shed 60–90% while transparency stays intact.
Nudge the slider if a preview warrants it, then download each WebP alone or every file bundled into one zip.
PNG vs WebP
For anything a browser displays, this contest is settled: WebP delivers the same visible pixels for a fraction of PNG’s bytes, and alpha survives the trip. PNG keeps exactly one job — the lossless master you edit; the copy you serve should be WebP.
| PNG | WebP | |
|---|---|---|
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes (full alpha) | Yes (full alpha) |
| Animation | No | Yes |
| Support | Universal — every browser, editor and OS | All current browsers (since 2020) |
| Best for | Logos, screenshots, graphics with transparency | Web images: photos, thumbnails, UI assets |
Frequently asked questions
No — that is the whole reason I built this. The conversion runs in your browser using WebAssembly, so your files never leave your device; there is no server in the loop at all. It also means the tool keeps working offline once the page has loaded, and there is no file size limit beyond your device’s memory.
Yes. WebP fully supports an alpha channel, so transparent logos, icons and cutouts convert with their transparency intact — at a fraction of the file size.
Photographic PNGs and screenshots typically shrink 60–90% at quality 80. Simple graphics with few colors shrink less, because PNG already compresses those well. The tool shows the exact size reduction per file before you download anything.
Yes — every current browser (Chrome, Safari, Firefox, Edge) has supported WebP since 2020. For the vast majority of audiences it is safe to serve WebP without a PNG fallback.
For anything displayed in a browser, WebP wins on bytes: a 400 KB interface screenshot typically lands between 60 and 120 KB at quality 80, alpha intact. PNG stays the better master copy for editing, since it is lossless — keep the PNG in your design folder and serve the WebP. If you need the maximum squeeze for hero images, PNG to AVIF goes further still.
Three cases: images that will be edited again (WebP at quality 80 discards data on each re-save), pixel art and one-bit line work (PNG’s lossless filters often beat WebP there), and files headed to print or office software that still refuses WebP. For that last group, PNG to JPG is usually the friendlier downgrade.
Related tools
Convert JPG to WebP
Convert JPG to WebP in your browser — free, no upload, no account. Photos come out 25–35% smaller at the same visual quality, with a live quality slider.
Convert PNG to AVIF
Convert PNG to AVIF in your browser — free, private, no upload. AVIF keeps full transparency and beats even WebP on size, often 80–95% below the original PNG.
Convert WebP to PNG
Convert WebP to PNG in your browser — free and lossless, transparency intact, no upload needed. Get a file that opens anywhere, from Photoshop to PowerPoint.
Convert PNG to ICO (favicon)
Convert PNG to a multi-size ICO favicon in your browser — free, no upload. One file with 16, 32 and 48px icons with full alpha, ready for any site root.