How to use the TIFF to JPG converter
- Add .tif or .tiff files, or a whole folder of scans.
- Pick a quality: the default 90 for faithful copies, 75 to 80 for on-screen sharing.
- If needed, choose a width in More settings; then convert and save the results.
Which TIFFs open
Uncompressed files and the three common compression schemes, LZW, Deflate and PackBits, are all read. That covers what scanners, photo software and most export dialogs produce.
Each file yields one JPG made from its first full-size image. A multi-page fax or a stack of scanned pages therefore gives you page one alone, so keep the original for the rest.
Size before and after
An uncompressed scan at high resolution can run from 20 to 100 MB. At quality 90 the JPG is usually a small fraction of that and looks the same on a monitor.
Scans made at 600 dpi hold far more pixels than a screen or a video slideshow can show. A width of around 2500 pixels for a page, or 1920 for a full-screen still, trims the file much further.
Converting a whole archive
Drag in the folder and the TIFFs queue up and convert on your computer, several at once. File names stay the same apart from the new .jpg ending, and one ZIP gathers the lot.
Nothing is uploaded and there is no size cap, which matters for scans of hundreds of megabytes. Truly huge files are better handled in a desktop browser than on a phone.
Questions
Can it read 16-bit TIFFs?
Yes. They are reduced to 8 bits per channel, which is the most JPG can hold.
What happens to transparency in a TIFF?
JPG cannot keep it, so see-through areas are filled with the background colour picked under More settings: white, black or light grey.
My TIFF will not convert. Why?
A few rare files, for example ones compressed with the outdated JPEG-in-TIFF scheme of 1990s software, may not decode. Re-saving as LZW or uncompressed TIFF in an editor usually solves it.