The format scanners love, the web doesn't
TIFF is what scanners, fax archives and print workflows produce — excellent for archival, useless for sharing: browsers won't preview it, mail clients choke on 50 MB attachments, upload forms reject it. Converted to JPG, each page becomes a normal image that opens everywhere at a fraction of the size.
The decoder handles what real-world TIFFs actually contain: LZW and Deflate compression, CCITT fax encodings, 16-bit channels, CMYK from print pipelines and multi-page documents. Since TIFFs are often confidential — contracts, medical scans, IDs — it matters that everything is decoded on your device. Nothing is uploaded, ever.
Frequently asked questions
My TIFF has many pages — what do I get?
One JPG per page, named page1, page2 and so on, downloaded automatically as each page converts.
Which TIFF variants are supported?
The ones that actually occur: uncompressed, LZW, PackBits, Deflate, CCITT G3/G4 fax, tiled files, 16-bit channels and CMYK. BigTIFF (files over 4 GB) is not.
Will image quality suffer?
At 90% the difference from the original is invisible for scans and photos. If you need pixel-perfect lossless output, use TIFF to PNG instead.