PNG to QOI converter
A free PNG to QOI converter for Portable Network Graphics files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your PNG files here
or browse your device · paste with Ctrl+V
Accepts .png files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your PNG files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
QOI is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your QOI
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
PNG
Portable Network GraphicsLossless compression with a real alpha channel, created as a free replacement for GIF. Perfect for logos, screenshots and interface art with sharp edges; wasteful for photographs, where JPEG or WebP will be a fraction of the size.
- Developed by
- PNG Development Group / W3C
- Released
- 1996
- Extension
- .png
- MIME type
- image/png
- Compression
- Lossless
- Specification
- Open
QOI
Quite OK Image FormatA lossless format whose entire specification fits on one page, encoding and decoding many times faster than PNG for a small size penalty. A favourite in game engines and hobby projects.
- Developed by
- Dominic Szablewski
- Released
- 2021
- Extension
- .qoi
- MIME type
- image/qoi
- Compression
- Lossless
- Specification
- Open
- Both PNG and QOI store every sample exactly, so nothing here is re-compressed — only the container changes.
Questions about converting PNG to QOI
Is this PNG to QOI converter free?
Yes. Converting PNG to QOI here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my PNG file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for PNG to QOI?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting PNG to QOI lose quality?
No. QOI stores its data losslessly, so everything in your PNG file is preserved exactly.
Can I convert several PNG files to QOI at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does PNG to QOI work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to QOI
16 formats can become QOI here.
Convert PNG to other formats
A PNG file can become any of these.
QOI to PNG
The reverse conversion
PNG to JPG
PNG to PDF
PNG to WEBP
Images to PDF
Turn photos or scans into a single PDF document.…
Compress Image
Make images smaller while keeping the same format.…
Resize Image
Change the pixel dimensions of one image or a whole …
Rotate & Flip Image
Turn images by 90 degrees or mirror them.…