Convert PNG to WebP Online — Free & Private
Convert PNG images to modern WebP for much smaller, web-ready files — right in your browser. Your photos never leave your device, and there are no watermarks or sign-ups.
Your images never leave your device
Nothing to delete later
Secure connection
Works in every modern browser
How it works
- 1
Add your PNGs
Drop your PNG files onto the page or click to browse and select them.
- 2
Convert
Press Convert — each image is re-encoded as a WebP in your browser.
- 3
Download
Save the smaller WebP files instantly, individually or all at once.
Why use this tool
Much smaller files
WebP is far more efficient than PNG, often cutting size by half or more.
Private by design
The conversion runs locally in your browser — your images are never uploaded.
Keeps transparency
Unlike JPG, WebP preserves the transparent areas your PNG already has.
No watermark
The WebP is clean, with nothing stamped onto it.
Free & unlimited
No account, no trial, no per-file charges — convert as many images as you like.
Works on any device
Phone, tablet, or computer — it runs in the browser you already have.
What does converting PNG to WebP do?
WebP is a modern image format built for the web that compresses far more efficiently than PNG while keeping the same visual quality — and, crucially, it still supports transparency. Converting a PNG to WebP re-encodes the same picture in this leaner format, so a heavy PNG with a transparent background becomes a much smaller WebP that keeps its cut-out and loads faster on a website. Because this tool runs entirely in your browser, the image is converted on your own device and is never uploaded.
When should you convert PNG to WebP?
Convert whenever a PNG is bound for the web and you want it lighter without losing transparency. Site owners switch logos, icons, and product cut-outs to WebP to speed up pages, since search engines reward faster loads. It is the natural next step after exporting graphics as PNG. If you need transparency, WebP beats JPG (which has none); if you only need a smaller photo and transparency does not matter, PNG to JPG is also an option. For the smallest possible files with alpha intact, WebP is the modern default.
How to get the best results
For photographs and complex images, a slightly lower WebP quality shrinks the file dramatically with almost no visible difference. For flat graphics, logos, and sharp text, a high quality keeps edges crisp while still beating PNG on size. Transparency carries over automatically, so a logo on a transparent background stays a clean cut-out. If a specific older tool cannot open WebP, keep the PNG original as a fallback — but every current browser displays WebP natively.
Limitations to be aware of
WebP is supported by all modern browsers, but a few older or niche programs still cannot open it — if a system specifically needs PNG or JPG, convert to that instead. Lossy WebP, like JPG, discards some detail for size; use a higher quality when edges and text must stay sharp. And while WebP usually wins on size, a small, already-optimised PNG may not shrink much further. For web delivery with transparency, though, WebP is almost always the smaller, better choice.
Common mistakes and how to avoid them
The most common mistake is converting to WebP for a workflow that still requires PNG or JPG — check the destination first. Another is using a very low quality on a logo, which can blur its edges; keep quality high for graphics and text. People also sometimes forget WebP already keeps transparency, and needlessly flatten the background first. Keep the PNG original if you ever need a universally compatible file, since a handful of legacy tools still lack WebP support.
Using it on mobile and desktop
On a phone, convert a PNG to a lighter WebP before uploading it to a site or CMS, with no app — everything runs locally. On a computer, drop a batch of PNGs and convert them all to WebP at once to speed up a whole gallery or page. Because there is no app to install, the same link works on every device, and nothing you add is ever uploaded.
Why convert here instead of another site?
Most online PNG-to-WebP converters upload your files to a server, convert them there, and promise to delete them later. This tool never uploads anything — the conversion happens inside your browser, so images that may be personal or private stay on your device from start to finish. There are no watermarks, no sign-up wall, and no cap on how many images you convert. It is faster too, with no upload-and-wait step, and it works offline once the page has loaded.
How it compares
| Feature | This tool | Typical online converters |
|---|---|---|
| Images uploaded to a server | Never — converted in your browser | Usually uploaded |
| Keeps transparency | Yes | Usually |
| Watermark on output | No | Sometimes |
| Account or sign-up | Not required | Often required |
| Image-count limit | Unlimited | Often capped on free tier |
| Price | Free | Free / paid tiers |
Features
PNG to .webp
Outputs the modern WebP format supported by every current browser.
Transparency preserved
The alpha channel from your PNG carries straight into the WebP.
Big size savings
WebP usually beats both PNG and JPG on file size at the same quality.
Quality you control
Choose how hard to compress — smaller file or higher fidelity.
Batch convert
Add several PNGs and turn them all into WebP in one go.
No installation
Nothing to download or install — it works on the web page.
Arabic & RTL friendly
Full interface in eight languages, including right-to-left Arabic.
Secure by default
Served over HTTPS, with no file tracking and no third-party upload.
Who uses it
Website owners
Switch PNGs to WebP to cut page weight and speed up load times, keeping transparency.
Designers
Export lighter WebP assets for the web while preserving clean cut-outs.
Developers
Serve smaller images to improve Core Web Vitals without a build pipeline.
Everyday users
Shrink a PNG for an upload that accepts WebP — privately, on their own device.