Turn PNG images into QOI. It is converted in your browser, so the file never leaves your device.
Drop PNG files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop PNG files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the QOI, or download everything as one ZIP if you converted several files.
The PNG to QOI converter is part of this page and runs inside your browser. Your images are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
PNG files are large, especially for photographs. QOI is lossless and extremely quick to read and write. PNG is at home in screenshots, logos, graphics with text or transparency; QOI is the usual choice for game textures and pipelines that need very fast encoding.
The defaults suit most files. Under Options you can resize the result.
QOI stores every pixel and the alpha channel exactly; the encoder is a small WebAssembly module that downloads the first time and is cached.
PNG stores every pixel exactly, with optional transparency. It was created as a patent-free replacement for GIF and is the standard for screenshots, logos and interface graphics. Photos saved as PNG are several times larger than the same photo as JPG.
Opens in Every browser, phone and image app
PNG converterQOI is a lossless image format with a specification short enough to read in a few minutes. It compresses far less than PNG but encodes and decodes many times faster, which is why game developers and tool authors like it. Support in everyday apps is thin.
Opens in IrfanView, XnView, many game engines and graphics tools; no browsers or phones
QOI converter| PNGPNG image | QOIQOI image | |
|---|---|---|
| Stands for | Portable Network Graphics | Quite OK Image Format |
| Type | Raster image | Raster image |
| Compression | Lossless | Lossless |
| Transparency | Yes, full alpha channel | Yes |
| Animation | No (the APNG extension aside) | No |
| Introduced | 1996, by the PNG Development Group | 2021, by Dominic Szablewski |
| Opens in | Every browser, phone and image app | IrfanView, XnView, many game engines and graphics tools; no browsers or phones |
| Best for | Screenshots, logos, graphics with text or transparency | Game textures and pipelines that need very fast encoding |
| File extension | .png | .qoi |
No. The PNG to QOI conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
No further quality is lost: QOI stores the decoded pixels exactly. The result is identical in content.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the PNG file, press Convert and save the QOI. There is nothing to install.
Pictures of up to 120 megapixels are accepted (for example 12,000 by 10,000 pixels); a larger one is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.