QOI to PNG converter
A free QOI to PNG converter for Quite OK Image Format files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your QOI files here
or browse your device · paste with Ctrl+V
Accepts .qoi 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 QOI 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
PNG is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your PNG
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
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
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
- Both QOI and PNG store every sample exactly, so nothing here is re-compressed — only the container changes.
Questions about converting QOI to PNG
Is this QOI to PNG converter free?
Yes. Converting QOI to PNG 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 QOI 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 QOI to PNG?
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 QOI to PNG lose quality?
No. PNG stores its data losslessly, so everything in your QOI file is preserved exactly.
Can I convert several QOI files to PNG 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 QOI to PNG 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 PNG
16 formats can become PNG here.
Convert QOI to other formats
A QOI file can become any of these.
PNG to QOI
The reverse conversion
JPG to PNG
PDF to PNG
WEBP to PNG
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.…