TIFF to QOI Converter
Convert TIFF to QOI in your browser. TIFF files usually come from scanners, print and publishing workflows, photo archives and tethered camera capture; 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
TIFF expected · other image formats also work
How to use TIFF to QOI
- 1
Add your TIFF 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 tiff to qoi
Where the QOI goes next
QOI opens in game engines, GIMP 3, ImageMagick, XnView MP and many small libraries.
QOI next to TIFF
Both sides are lossless, so the size depends on how well the QOI encoder handles this picture compared with the TIFF's none, LZW, PackBits, Deflate or JPEG, chosen per file.
Written without a lossy pass
The QOI is written losslessly, so the pixels decoded from the TIFF 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.
TIFF vs QOI
What changes from TIFF to QOI
Encoding: the TIFF uses none, LZW, PackBits, Deflate or JPEG, chosen per file; QOI uses lossless, byte-aligned run, index, difference and literal codes, and the download is a lossless RGBA QOI file.
Bit depth: 1 to 16 bits per channel, or 32-bit floating point in the TIFF; QOI allows 8 bits per channel, and the QOI written here has 8 bits per channel. 16-bit and floating-point TIFFs are reduced to 8 bits per channel.
Colour: RGB, CMYK, Lab, greyscale or palette, often with an ICC profile in the TIFF; QOI supports RGB or RGBA, tagged sRGB or linear, written here as 8-bit sRGB.
Transparency: the TIFF stores it as an extra sample declared in the ExtraSamples tag; the QOI keeps it as a full 8-bit alpha channel.
Other images: the TIFF can hold several pages, each in its own image file directory; only the main image is converted.
Metadata: the TIFF can carry EXIF, XMP, IPTC and ICC, all stored as tags; QOI can carry none: a 14-byte header holds only size, channels and colour space, but nothing is copied across.
About TIFF
TIFF is the professional archive and print format. It can hold multiple pages, high bit depths and lossless data, and is common in scanning, publishing and GIS.
A TIFF begins with 'II' or 'MM' for the byte order and the number 42, then an offset to the first image file directory (IFD): a table of tags giving the size, compression, colour model and the location of the strips or tiles of pixels. Each further page is another IFD.
TIFF files usually come from scanners, print and publishing workflows, photo archives and tethered camera capture.
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 TIFF to QOI makes sense
QOI is the better choice for fast lossless storage in games and tools, while TIFF suits printing, scanning and archival masters.
QOI strengths: Extremely fast lossless encode and decode; Simple, open spec. Drawbacks to weigh: Not supported by browsers or mainstream apps.
Limitations
- Only the first page of a multi-page TIFF is converted; split the file first if you need every page.
- CMYK TIFFs from print workflows are converted to RGB, which changes how a print shop's colours are described.
- 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 TIFF to QOI lose quality?
QOI is written losslessly, so the pixels are stored exactly as decoded. 16-bit and floating-point TIFFs are reduced to 8 bits per channel. Not carried over: any several pages.
Is transparency kept in the QOI?
Yes. TIFF stores it as an extra sample declared in the ExtraSamples tag, and the QOI is written with an alpha channel, so transparent areas stay transparent.
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.