PNG to WEBP Converter
Convert PNG files (released 1996, Lossless) to WebP (Lossless + Lossy (your pick), typically 25–35% smaller than equivalent JPEG/PNG). Runs in your browser — no upload, no signup.
Based on 12,431+ conversions delivered
If you're shipping images to the web, converting PNG to WebP is one of the easiest performance wins available. WebP keeps PNG's transparency but compresses far smaller, which means faster page loads, better Core Web Vitals, and less CDN bandwidth. In our sample set, PNG files came out about 85% smaller as WEBP. Every modern browser supports WebP, so for 2024-era audiences you can serve it as the primary asset. Keep a PNG fallback only if you still support very old clients. Conversion runs entirely in your browser — no upload, no signup.
Looking to programmatically convert PNG to WEBP?
Same engine, available as a JSON API. Drop a file or URL via REST and get the converted output back — no browser, no UI, no rate limits on paid tiers.
Sub-second response on common pairs
Webhook delivery for batch jobs
100+ format pairs supported
PNG vs WEBP — side-by-side
The numbers and capabilities at a glance, so you know what you're trading.
PNG
- Year released
- 1996
- Compression
- Lossless
- Transparency
- Yes (full alpha)
- Animation
- No (use APNG / GIF / WebP)
- Browser support
- Universal (every browser since the 90s)
- Best for
- Screenshots, icons, logos, any image with transparency
WebP
- Year released
- 2010 (Google)
- Compression
- Lossless + Lossy (your pick)
- Transparency
- Yes (alpha in both modes)
- Animation
- Yes
- Browser support
- All modern browsers (95%+ since 2020)
- Best for
- Web production where every kilobyte counts
Real PNG → WEBP file sizes
We ran a fixed set of sample images through this exact converter so you can see the typical size impact before converting your own files.
| Sample image | PNG size | WEBP size | Change |
|---|---|---|---|
| Photo | 174.4 KB | 23.1 KB | -87% smaller |
| Screenshot / UI | 488 B | 728 B | +49% larger |
| Logo / transparency | 6.8 KB | 2.8 KB | -58% smaller |
Measured on a 256×256 sample set with this converter on 2026-05-28. Real-world files vary with resolution, colour and content.
Heads up before converting PNG → WEBP
What changes — and what your conversion will cost — based on how PNG and WebP differ.
Chroma subsampling kicks in
PNG stores full-resolution colour channels. WebP's default lossy mode subsamples chroma (typically 4:2:0) — half the colour information thrown away to save bytes. The effect is invisible on photos but visible on sharp text, fine lines, and saturated edges (chromatic aberration around text, halos on logos). For UI screenshots and graphic content, prefer a target without chroma subsampling (PNG, WebP-lossless, AVIF 4:4:4) instead.
Best practices for PNG → WEBP
Concrete settings to pick before you convert PNG to WebP.
- Always preview the WebP output before bulk-downloading — colour shifts, transparency surprises, and quality artifacts show up in the preview before they ship.
- Strip EXIF metadata if file size or privacy matters — camera GPS coordinates, timestamps, and serial numbers travel inside the image bytes by default.
- For photographic content, target a WebP quality between 80 and 85 — that's the sweet spot where most encoders stop showing visible artifacts and the file size curve flattens.
- Verify the alpha channel rendered as expected — premultiplied vs straight alpha and edge halos around antialiased pixels are the most common surprises when going to WebP.
- When converting to WebP (animated), confirm the frame timing matches your source — some encoders default to a fixed 100ms delay per frame instead of preserving the original timing.
- For web WebP delivery, encode in sRGB — wider colour spaces (Display P3, ProPhoto) render unpredictably across browsers and email clients.
When NOT to convert PNG → WEBP
Honest cases where this conversion is the wrong call — pick a different format or keep your PNG source.
Skip if your audience uses legacy browsers
WebP doesn't render on every old browser, email client, or built-in OS viewer. If your traffic includes IE11, legacy Outlook, or older Android WebViews, stay on PNG (or a universal format like JPEG/PNG) — or ship WebP alongside a fallback via the HTML <picture> element.
Skip if the file is bound for print
WebP is a delivery-grade web format. Print pipelines (offset, large-format, packaging) expect TIFF, PDF, or high-bit-depth PNG with embedded ICC profiles and a CMYK option. Converting PNG to WebP for a print job will likely fail prepress checks — keep the original or convert to a print-friendly format instead.
The importance of a good image conversion
Why getting PNG → WEBP right matters more than you think.
Frequently asked
The basics everyone asks before dropping a file.