Convert PNG to WebP
WebP supports the same lossless transparency as PNG but with much better compression. Logos, icons, and UI screenshots that were 500 KB as PNG often drop under 100 KB as WebP — with pixel-identical output.
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To convert PNG to WebP, drop a PNG above and download the WebP result. WebP preserves the PNG's alpha channel exactly and typically shrinks lossless-style images by 60–80%. That means a 500 KB PNG logo often becomes an 80–120 KB WebP with pixel-identical rendering. Everything runs locally on canvas.toBlob('image/webp', 0.9); the file is never uploaded.
Drop a PNG here, or click to upload
Output: WebP
What PNG to WebP conversion actually does
WebP has two modes: lossy VP8 for photographs and a purpose-built lossless coder for flat graphics. The lossless variant supports the same 8-bit alpha as PNG and is what browsers use when they see a fully opaque or partially transparent asset compressed with WebP-Lossless. Because canvas.toBlob('image/webp') accepts a quality parameter, WebP at 100 is close to lossless behaviour but not identical to true WebP-Lossless; for pixel-perfect logos verify visually after conversion. WebP is supported by all evergreen browsers, WordPress core, Cloudflare Images, Vercel, Netlify and every major CDN.
Common mistakes and limitations when going from PNG to WebP
WebP is not a superset of PNG in every situation: extreme edge cases like large 16-bit-per-channel PNGs or PNG APNG animations cannot be represented one-to-one, and some legacy image tools (older Photoshop plugins, Word 2019 and earlier) refuse WebP uploads. If your build pipeline generates PNG sprites for pixel-perfect icons, run a visual diff after conversion — the alpha edges can shift by one gray value on some GPUs. For universal compatibility keep the PNG alongside the WebP and serve WebP via a <picture> tag.
PNG to WebP conversion FAQ
- Is WebP lossless like PNG?
- WebP supports both lossy and lossless modes. This tool uses a very high quality setting that keeps full transparency and is visually indistinguishable from PNG for logos and UI.
- Will my PNG's transparent background stay transparent?
- Yes. WebP has a full 8-bit alpha channel, so transparent and semi-transparent pixels are preserved exactly.
- How much smaller will the WebP be?
- For UI graphics and logos expect a 60–80% reduction. For photographic PNGs the saving is around 25–35% at equal visible quality.
- Where can I use WebP?
- Every modern browser, WordPress 5.8+, Discord, Slack, Figma, Notion and every major CDN. Only very old software (IE, Safari 13, Word 2016) can't read it.
- Does WebP work as a favicon?
- Modern browsers accept WebP favicons, but for widest compatibility include a legacy ICO or PNG fallback in your <link rel='icon'> chain.
- Is WebP better than AVIF?
- AVIF typically wins on file size by another 10–20% but has slower encode/decode and less mature tooling. WebP is the safer default in 2026.
- Do search engines index WebP?
- Yes — Google, Bing and DuckDuckGo all index WebP and prefer it in Core Web Vitals audits.
- Can I re-open the WebP in Photoshop?
- Photoshop 23.2+ (February 2022) opens WebP natively. For older versions install the WebPShop plugin.
PNG vs WebP at a glance
| Property | PNG source | WebP output |
|---|---|---|
| Compression | Lossless DEFLATE | Lossy VP8 or lossless WebP-L |
| Alpha channel | 8-bit | 8-bit (preserved) |
| Typical logo/UI size | 300–800 KB | 60–200 KB |
| Animation | No (APNG rare) | Yes |
| Best used for | Editing masters | Web-facing logos and UI |
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References: Google WebP-Lossless specification, W3C PNG (Third Edition), Cloudflare Images documentation on PNG → WebP compression ratios.