How do I convert PNG to WebP?

Add your PNG file to the upload area above, then press Convert. The WebP file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to WebP reduce quality?

WebP uses lossy compression, so some data is discarded. At the default quality the difference is very hard to see or hear; raise the quality setting if you need to be certain, at the cost of a larger file.

How large a file can I convert?

Up to 120 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

ImageAdjustable qualityRuns in your browser

PNG to WebP Converter

Turn PNG files into WebP in a couple of clicks. Lossless image format with full alpha transparency. Modern web format, ~30% smaller than JPG at similar quality. The output is re-encoded, so quality depends on the settings you choose.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

PNG files (.png) · up to 120 MB each

or paste files from your clipboard

Ready when you are

Drop a PNG file above and FileTools360 will turn it into WebP — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your PNG files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control quality, dimensions, rotation and metadata removal.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

PNG and WebP explained

PNG is a lossless raster format built to replace GIF. It stores every pixel exactly as given and supports a full 8-bit alpha channel, which means genuine partial transparency rather than the single transparent colour GIF offers.

WebP is a Google-developed format that offers both lossy and lossless modes, transparency, and animation in one container. In its lossy mode it typically produces files around 25–35% smaller than JPEG at comparable visual quality.

Where PNG files come from: Screenshots, exported logos and UI assets, and anything designed rather than photographed.
Where WebP is used: Modern websites, and increasingly the default export from web-focused design tools.

PNG vs WebP

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

PNG compared with WebP
Property	Source	Target
Compression	Lossless	Lossy or lossless
Transparency	Yes	Yes
Animation	No	Yes
Introduced	1996	2010
Browser support	Universally supported.	All modern browsers. Some older desktop apps can't open it.

PNG is stronger at: Completely lossless — re-saving never degrades the image. Full alpha transparency, including soft edges and shadows. Sharp text and hard edges stay sharp.
WebP is stronger at: Substantially smaller than JPEG at similar quality. Supports transparency, which JPEG cannot. Supports animation, replacing GIF at a fraction of the size.

Why convert PNG to WebP?

People make this switch when they run into the limits of PNG: you are publishing photographs on the web, where it will be several times larger than it needs to be. WebP is the better fit when you are publishing images on a website and want smaller files without a visible quality drop.

PNG limitations that prompt the switch: Much larger than JPEG or WebP for photographic content. No animation in practice (APNG exists but support is inconsistent). No native support for CMYK or print colour workflows.
What you give up: Desktop applications and older software often cannot open it. Some photo printing services and older phones reject it.

Does converting PNG to WebP reduce quality?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.

Converting a JPEG to PNG does not improve its quality. It freezes the image exactly as it already is, artefacts included, in a larger file.

WebP is not always smaller. For simple graphics with few colours, a well-optimised PNG can still win.

About these formats

Source

Portable Network Graphics

Lossless image format with full alpha transparency.

Extensions: .png
MIME type: image/png
Best for: Transparency · Graphics and logos · Screenshots
Compatibility: Universally supported.

Target

WebP Image

Modern web format, ~30% smaller than JPG at similar quality.

Extensions: .webp
MIME type: image/webp
Best for: Websites · Smaller file sizes · Transparency + animation
Compatibility: All modern browsers. Some older desktop apps can't open it.

Good to know