ORF to TIFF Converter
Convert ORF to TIFF in your browser. The preview inside the maker notes is found by scanning the whole file, and that preview is what gets converted. No raw development happens here. You get an uncompressed 8-bit RGBA TIFF with the resolution recorded. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
RAW expected · other image formats also work
How to use ORF to TIFF
- 1
Add your ORF files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the TIFF is written uncompressed. 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 .tiff files one at a time or together as a ZIP.
Why use Aback Images for orf to tiff
Where the TIFF goes next
TIFF opens in Photoshop, Lightroom, GIMP, Affinity, macOS Preview, Windows Photos and print RIPs.
TIFF next to ORF
The TIFF stores the camera preview's pixels uncompressed, so it can be as large as the 12 to 30 MB raw file, or larger, depending on the preview's resolution.
No new artefacts
The preview inside the ORF is a camera JPEG; the TIFF stores its decoded pixels uncompressed, so this step adds no compression damage of its own.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
ORF vs TIFF
What changes from ORF to TIFF
Encoding: the ORF uses losslessly compressed sensor data, with a preview and thumbnail; TIFF uses none, LZW, PackBits, Deflate or JPEG, chosen per file, and the download is an uncompressed 8-bit RGBA TIFF with the resolution recorded.
Bit depth: 12 bits per channel in the ORF; TIFF allows 1 to 16 bits per channel, or 32-bit floating point, and the TIFF written here has 8 bits per channel. The sensor's 12 bits are not used: the 8-bit camera preview is converted.
Colour: camera RGB from a Bayer mosaic in the ORF; TIFF supports RGB, CMYK, Lab, greyscale or palette, often with an ICC profile, written here as 8-bit sRGB.
Metadata: the ORF can carry EXIF and Olympus maker notes, which also contain the preview; TIFF can carry EXIF, XMP, IPTC and ICC, all stored as tags, but nothing is copied across.
About ORF
ORF is the raw format of Olympus and OM System cameras, built around Four Thirds and Micro Four Thirds sensors. It stores 12-bit sensor data with a JPEG preview kept inside Olympus's maker notes.
ORF looks like TIFF but replaces the version number 42 with the letters 'RO', so a little-endian file starts 'IIRO' and generic TIFF readers reject it. Its JPEG preview is not in the main image directory but inside the camera-settings block of Olympus's maker notes.
ORF files usually come from Olympus E-series DSLRs, OM-D and PEN mirrorless cameras and OM System bodies.
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.
When converting ORF to TIFF makes sense
TIFF is the better choice for printing, scanning and archival masters, while ORF suits editing Olympus and OM System photos in a raw developer.
TIFF strengths: Lossless and print-ready; Multiple pages in one file; Preferred by print shops and archives. Drawbacks to weigh: Very large files; Browsers cannot display it; Many variants and compression schemes.
Limitations
- High Res Shot files combine several exposures in camera; the preview shows the combined result at its stored size.
- The TIFF is written uncompressed for maximum compatibility, so it is large; print shops and archives generally expect that.
- Browsers other than Safari do not display TIFF, so it is not a format for the web.
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Frequently asked questions
Does converting ORF to TIFF lose quality?
TIFF is written uncompressed, so the pixels are stored exactly as decoded. Those pixels come from the camera's JPEG preview, so its compression stays, but nothing new is lost. The sensor's 12 bits are not used: the 8-bit camera preview is converted.
Which apps open TIFF files?
Photoshop, Lightroom, GIMP, Affinity, macOS Preview, Windows Photos and print RIPs. It opens in Safari only; other browsers do not display TIFF.
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.