PNG to WebP Converter — Free, Private, No Upload
Trim PNG screenshots and graphics into smaller WebP files that keep transparency, right on your device. Nothing is uploaded, no limits, no signups.
WebP is the rare format that beats PNG at its own game: it can keep full transparency yet still comes out noticeably smaller. For logos, icons, screenshots and graphics headed for the web, converting PNG to WebP trims page weight and storage without visibly changing the image — the perfect swap when a PNG feels heavier than it should.
How to convert PNG to WebP
- 1 Drop your PNG files into the box above, or tap to pick them from your phone or computer.
- 2 The format is already set to WebP — the smaller, transparency-friendly option.
- 3 Download each WebP, or grab them all at once as a .zip. Nothing ever left your device.
Yes — because nothing is uploaded.
Most converters send your photos to a server you know nothing about. Filexum can't, because it never asks for them: the conversion runs inside your browser, on your own device. You don't have to take our word for it — open your browser's Network tab and watch it stay empty, or turn off Wi-Fi and convert anyway.
- Your photos are uploaded to a stranger's server
- Files may be kept, cached or logged after conversion
- Ads, watermarks, sign-ups or daily limits
- Needs a working internet connection
- Photos are converted on your device — nothing is uploaded
- There is no server, so there is nothing to store or leak
- No ads, no watermark, no signup, no limits
- Works offline — try it in airplane mode
Why PNG?
PNG arrived in 1996 as a free, patent-unencumbered image format, and it does something JPG can't: it is lossless. Every pixel is preserved exactly, and it supports full alpha transparency — which makes it the go-to format for screenshots, logos, diagrams and any image with sharp edges or text.
That perfect quality has a cost in size: a photographic PNG can be several times larger than the same picture as a JPG. If you want a pristine, editable copy of a HEIC photo — or you need transparency — PNG is the right target. For small, shareable files, JPG or WebP will serve you better.
Why WebP?
WebP is a modern image format Google released in 2010, built to make photos smaller on the web without a visible drop in quality. It supports both lossy and lossless compression as well as transparency, and typically produces files noticeably smaller than an equivalent JPG or PNG.
Every current browser — Chrome, Safari, Firefox and Edge — displays WebP, so it's an excellent choice for websites and for saving space on your own device. A handful of older apps still don't accept it, so when maximum compatibility matters, JPG remains the safest bet.
PNG vs WebP at a glance
| PNG | WebP | |
|---|---|---|
| Typical size (12 MP photo) | ≈12 MB | ≈1.5 MB |
| Opens on Windows / old apps | Everywhere | All modern browsers |
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes (alpha) | Yes (alpha) |
| First shipped | 1996 · W3C | 2010 · Google |
PNG to WebP — frequently asked
Are my PNG files uploaded anywhere?
No. Everything runs inside your browser, on your own device — no file, filename or hash ever leaves your machine. Try it in airplane mode to see for yourself.
Does WebP keep the transparency from my PNG?
Yes. WebP supports full alpha transparency, so transparent PNG backgrounds are preserved exactly in the WebP — one of the main reasons to prefer it over JPG here.
Is WebP really smaller than PNG?
For most images, clearly so — WebP typically produces meaningfully smaller files than PNG while keeping the same quality and transparency, which is why it's popular for the web.
Will the image lose any quality?
WebP can be lossless like PNG, and even its lossy mode is visually very close to the original. For crisp screenshots and graphics the result looks the same at a fraction of the size.
Does WebP work everywhere?
Every current browser displays WebP. A few older apps still don't; if you need a file that opens absolutely anywhere, convert the PNG to JPG instead.
Is it free with no limits?
Yes — no signup, no ads, no watermark, and no cap on how many PNGs you convert beyond your device's memory.