Why move PNG to WebP
PNG earned its place because it never throws pixels away. That is exactly what you want for a logo with hard edges or a screenshot full of thin text. It is also why PNG files get heavy fast — a single full-page screenshot can run 2–3 MB, and a hero graphic with a soft gradient can be worse. On a web page, that weight is the first thing a visitor waits for.
WebP was built to fix that specific problem. It compresses the same image far more efficiently, and — this is the part people miss — it still supports full transparency. So the PNG you use for a transparent product shot converts to a WebP that is a fraction of the size and drops onto any background just as cleanly.
Two numbers worth remembering: lossless WebP tends to land 20–30% under the original PNG, and lossy WebP (perfectly fine for photographs and most UI graphics) often cuts 60–80%. You choose which one with a single quality slider.
Convert PNG to WebP in three steps
- Drop your PNG files inDrag one image or a hundred onto the drop zone. They load straight into memory — no upload bar, because there is nothing to upload.
- Keep WebP as the outputThe format is already set to WebP. Leave quality at 75 for a strong size cut you can't see, or push it lower for maximum savings.
- Download your WebPGrab a single file, or hit "Download all as ZIP" to pull the whole batch at once. Original filenames are kept, only the extension changes.
PNG vs WebP, honestly
| PNG | WebP | |
|---|---|---|
| Transparency | Yes | Yes |
| Typical web size | Large | 25–80% smaller |
| Best for | Editing masters, print | Anything on a website |
| Browser support | Universal | All modern browsers |
The one place to stay on PNG is your working master — the file you keep re-editing, or anything headed to print. For everything that ships to a browser, WebP is the better default. If you ever need to go back, converting WebP to PNG is just as quick.
Your files never leave your device
Most "free converter" sites upload your images to a server you know nothing about. Compressly doesn't. The encoders — the same MozJPEG, libwebp and libavif projects the browsers themselves use — are compiled to WebAssembly and run on your machine. Open your network tab while you convert; you'll see no image ever goes out. That matters when the PNG is a client mockup, an unreleased product, or a screenshot with something private in the corner.
More conversions
Questions
Does converting PNG to WebP keep transparency?
Yes. WebP carries a full alpha channel, so a transparent PNG stays transparent. Nothing is flattened onto a white background.
How much smaller will my files be?
Lossless WebP is usually 20–30% smaller than the PNG. Lossy WebP is often 60–80% smaller with no difference you can see on screen.
Is there a file-size or batch limit?
The free tier handles up to 20 files per batch at 25 MB each. Pro raises the cap to 200 MB and removes the batch limit.
Do I need to install anything?
No. It runs entirely in the browser tab you already have open. Nothing to download, nothing to sign up for.
Ready to convert?
Drop your PNGs in and watch them shrink — privately, in seconds.
Convert PNG to WebP →