PSD to QOI Converter
Convert PSD to QOI in your browser. PSD files usually come from Photoshop and apps that save Photoshop documents, such as Affinity Photo, GIMP, Photopea and Krita; QOI is the better fit for fast lossless storage in games and tools. You get a lossless RGBA QOI file. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
PSD expected · other image formats also work
How to use PSD to QOI
- 1
Add your PSD files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the QOI is written losslessly. Resizing and rotating are under More options if you need them.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .qoi files one at a time or together as a ZIP.
Why use Aback Images for psd to qoi
Where the QOI goes next
QOI opens in game engines, GIMP 3, ImageMagick, XnView MP and many small libraries.
QOI next to PSD
Both sides are lossless, so the size depends on how well the QOI encoder handles this picture compared with the PSD's raw or RLE (PackBits) channel data, ZIP in some 16 and 32-bit files.
Written without a lossy pass
The QOI is written losslessly, so the pixels decoded from the PSD arrive unchanged, apart from precision beyond 8 bits per channel.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
PSD vs QOI
What changes from PSD to QOI
Encoding: the PSD uses raw or RLE (PackBits) channel data, ZIP in some 16 and 32-bit files; QOI uses lossless, byte-aligned run, index, difference and literal codes, and the download is a lossless RGBA QOI file.
Bit depth: 8, 16 or 32 bits per channel in the PSD; QOI allows 8 bits per channel, and the QOI written here has 8 bits per channel. 16 and 32-bit documents are reduced to 8 bits per channel.
Colour: RGB, CMYK, Lab, greyscale, indexed or multichannel in the PSD; QOI supports RGB or RGBA, tagged sRGB or linear, written here as 8-bit sRGB.
Transparency: the PSD stores it as transparent layers plus extra alpha channels; the QOI keeps it as a full 8-bit alpha channel.
Other images: the PSD can hold layers, masks, adjustment layers and smart objects; only the main image is converted.
Metadata: the PSD can carry XMP, EXIF, IPTC and ICC in image resource blocks; QOI can carry none: a 14-byte header holds only size, channels and colour space, but nothing is copied across.
About PSD
PSD is Adobe Photoshop's layered working format. It keeps layers, masks and effects, but almost nothing outside Photoshop can display it, so finished designs are exported to PNG or JPG.
A PSD has five sections: a header ('8BPS', channel count, size, depth, colour mode), colour mode data, image resources (thumbnail, ICC, XMP, resolution), layer and mask information, and finally the merged composite image that the Maximize Compatibility option saves.
PSD files usually come from Photoshop and apps that save Photoshop documents, such as Affinity Photo, GIMP, Photopea and Krita.
About QOI
QOI is a modern lossless format that encodes 20-50 times faster than PNG with similar file sizes. It is popular in games and tools that value speed and simplicity.
A QOI file is a 14-byte header ('qoif', width, height, channels, colour space), a stream of chunks that each encode a run, an index into 64 recently seen colours, a small difference from the previous pixel or a literal value, and an 8-byte end marker.
When converting PSD to QOI makes sense
QOI is the better choice for fast lossless storage in games and tools, while PSD suits editing in Photoshop.
QOI strengths: Extremely fast lossless encode and decode; Simple, open spec. Drawbacks to weigh: Not supported by browsers or mainstream apps.
Limitations
- The merged composite is converted, so hidden layers stay hidden and visible ones are flattened together.
- Files saved with Maximize Compatibility turned off may hold no full-size composite; then only the small embedded thumbnail is available.
- Browsers and most mainstream apps cannot open QOI; it is meant for games and tools that read it directly.
- QOI files are usually close to PNG in size but much faster to encode and decode.
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Frequently asked questions
Does converting PSD to QOI lose quality?
QOI is written losslessly, so the pixels are stored exactly as decoded. 16 and 32-bit documents are reduced to 8 bits per channel. Not carried over: any layers.
Is transparency kept in the QOI?
Yes. PSD stores it as transparent layers plus extra alpha channels, and the QOI is written with an alpha channel, so transparent areas stay transparent.
Are PSD layers kept?
No. The flattened composite that Photoshop saves inside the file is converted, so the result looks like the PSD with all visible layers merged. Files saved without Maximize Compatibility fall back to the embedded thumbnail.
Which apps open QOI files?
Game engines, GIMP 3, ImageMagick, XnView MP and many small libraries. It does not open in web browsers.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.