PNG is a fantastic format — crisp, lossless, with full transparency support. But it has one big problem: the files are heavy. A single PNG screenshot can easily be 2–3 MB, and that weight slows your website to a crawl.
The fix is simple: convert your PNG files to WebP. WebP keeps the same sharpness and transparency but produces files that are typically 25–35% smaller — and often far smaller than that. This guide shows you exactly how to convert PNG to WebP for free, and when you should (and shouldn't) do it.
Key Takeaway: WebP gives you everything PNG does — including transparency — at a much smaller file size. Switching your web images from PNG to WebP is one of the fastest ways to speed up a website.
What Is WebP and Why Is It Smaller?
WebP is a modern image format created by Google specifically for the web. It uses smarter compression than PNG, which was designed back in the 1990s. The result is the same visual quality in a much smaller package.
Crucially, WebP supports both compression modes:
- Lossless WebP — every pixel is preserved exactly, just like PNG, but the file is around 26% smaller on average.
- Lossy WebP — discards imperceptible detail for dramatically smaller files, similar to JPG but more efficient.
It also keeps the alpha (transparency) channel that makes PNG so useful for logos and graphics — something JPG can never do. For a deeper format comparison, see WebP vs PNG vs JPG.
PNG vs WebP: A Quick Comparison
| Feature | PNG | WebP |
|---|---|---|
| Transparency | Yes | Yes |
| Lossless mode | Yes | Yes (≈26% smaller than PNG) |
| Lossy mode | No | Yes |
| Animation | No (APNG only) | Yes |
| Typical web file size | Large | 25–35% smaller |
| Browser support (2026) | Universal | All modern browsers (95%+) |
When You Should Convert PNG to WebP
- Website images — almost always convert. Smaller files mean faster loads and better SEO.
- Logos and icons with transparency — WebP keeps the transparency and slims the file.
- Screenshots — these are usually huge as PNG and compress beautifully to WebP.
- Product galleries and thumbnails — the savings multiply across dozens of images.
When to keep PNG instead
- When a specific platform or app you are uploading to does not accept WebP (rare, but it happens).
- For master/archival copies — keep an original PNG and convert copies for the web.
- For print workflows, where PNG or TIFF is expected.
Step by Step: How to Convert PNG to WebP for Free
TinyPNG Now converts PNG to WebP entirely in your browser — your images are never uploaded to a server, so the process is private, instant, and completely free.
- Open TinyPNG Now.
- Drag your PNG files onto the upload zone, or click to select them (you can add many at once).
- In the Settings panel, set Output Format to WebP.
- Set Quality to around 75% for the best balance of size and clarity. For pixel-perfect graphics, choose the lossless option.
- Click Compress — every image is converted instantly.
- Download files individually, or click Download All to grab them as a single ZIP.
Pro Tip: Converting a whole folder at once? Drag the entire folder onto the upload zone and convert every PNG to WebP in a single batch — then download them all as one ZIP. A task that used to take an hour now takes seconds.
How to Use WebP on Your Website
Once your images are converted, reference them like any other image:
<img src="logo.webp" alt="Company logo" width="200" height="60">
If you need to support a very old browser, the <picture> element lets you serve WebP with a PNG fallback automatically:
<picture><source srcset="image.webp" type="image/webp"><img src="image.png" alt="…"></picture>
In WordPress, most modern themes and caching plugins serve WebP automatically once you upload it. See our guide on batch compressing images for WordPress for the full workflow.
The SEO and Speed Payoff
Smaller images load faster, and page speed is a confirmed Google ranking factor through Core Web Vitals. Converting your PNGs to WebP directly improves your Largest Contentful Paint (LCP) score — often by a full second or more on image-heavy pages.
To understand exactly how this feeds into rankings, read why image compression is essential for SEO and how image optimization affects your PageSpeed score.
Frequently Asked Questions
How do I convert PNG to WebP for free?
Open a browser-based converter like TinyPNG Now, drop in your PNG files, set the output format to WebP, choose around 75% quality, and download. Everything runs in your browser, so it is free and your files are never uploaded.
Does converting PNG to WebP reduce quality?
Not noticeably. Lossless WebP keeps every pixel identical to the PNG while still being smaller, and lossy WebP at 75% quality looks indistinguishable to the eye for most images.
Does WebP support transparency like PNG?
Yes. WebP includes a full alpha transparency channel, just like PNG, but at a smaller file size — making it ideal for transparent logos and icons.
Do all browsers support WebP in 2026?
Yes. Chrome, Firefox, Edge, Safari and Opera have all supported WebP since 2020, covering over 95% of global web traffic. It is safe to use on virtually any modern site.
How much smaller is WebP than PNG?
WebP lossless is about 26% smaller than equivalent PNG. WebP lossy at 75% quality is typically 60–80% smaller than PNG for photos. For screenshots and flat-color graphics the savings are smaller (15–40%). Either way, WebP is the most effective format for shrinking PNG files without losing transparency support.
Can I convert PNG to WebP on iPhone or Android?
Yes. TinyPNG Now works in the mobile browser — open tinypngnow.com in Chrome (Android) or Safari (iPhone), tap the upload zone to select PNG files, set output to WebP, and download. No app download needed. The conversion runs locally in your browser, so nothing is uploaded.
Should I convert logos and icons from PNG to WebP?
Yes, for web use. WebP lossless preserves every pixel with full transparency, exactly like PNG, but the file is typically 20–30% smaller. Use WebP lossless (not lossy) for logos so text and sharp edges stay crisp. If the logo can be SVG, that's even better — but PNG logos should be converted to WebP lossless for web use.
How do I use WebP if some visitors have old browsers?
Use the HTML <picture> element: <picture><source srcset="image.webp" type="image/webp"><img src="image.png" alt="…"></picture>. Modern browsers use WebP; old browsers fall back to PNG automatically. In practice, WebP has 97%+ coverage in 2026, so a fallback is optional for most sites.
Summary: WebP matches PNG's quality and transparency at 25–35% smaller file sizes. Convert your web PNGs to WebP for free with TinyPNG Now — browser-based, private, and instant.