Compress TIFF online
TIFF is the format of scans and documents. On a black-and-white page it compresses losslessly: not one pixel changes, and the file drops by an order of magnitude.
Select the files you want to compress or convert and upload them here.
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Supported compression and conversion formats:
JPEG, JPG, PNG, GIF, WEBP, MP3, TIFF, TIF, BMP, DIB, RLE, JP2, JPF, JPG2, JPX, J2K, JPC, MJ2, OGG, OGV, SPX, WAV, 3GP, AAC, M4A, M4B, OPUS, OGA, MP4, MOV, AVI, MKV, MKA, WEBM, SVG, EXR, RAW, ARW, SRF, SR2, CRW, CR2, CR3, DNG, DCR, KDC, ERF, 3FR, MEF, MRW, NEF, NRW, ORF, PEF, RAF, RWL, RW2, SRW, X3F, PDF, JXL, DOCX, PPTX.
Why a scan shrinks so much
A scanned page is a vast white field with occasional black strokes. Group 4 encoding, invented for fax machines, stores runs rather than pixels: "two hundred white, three black, a hundred and eighty white." On text that wins 10–50×, and the compression is fully reversible — the image comes back pixel for pixel.
Black-and-white pages are detected and given Group 4 automatically. Colour scans and photographs stored in TIFF compress differently, and the gain there is more modest, because they contain almost no runs of identical pixels.
Multi-page files
TIFF can hold dozens of pages in one file, and such files are processed whole: pages do not scatter, order is preserved, metadata carries over into the result. That matters for accounting and banking documents, where a whole bundle of scans travels as a single file.
If the TIFF is not for storage but for sending or showing a document, consider converting it to PDF: the weight is comparable, but it opens on any phone and in any browser.
When a TIFF will not compress: it is too large
The weight on disk has nothing to do with it; what counts is how much memory the TIFF needs once unpacked. That is worked out from the header — width × height × bytes per pixel × number of pages — with a fourfold margin for processing. If it does not fit into the memory of your plan, the file is refused at once with a clear message instead of failing a minute into the work.
It happens with bundled scans and high-resolution colour scans: a 10 MB file of twenty 15-megapixel pages needs about 2.4 GB in memory, and CMYK or 16-bit pixels cost even more. What to do: split the file into parts, rescan at a lower resolution, or take a plan with a higher limit.
Common questions
Does compressing a TIFF degrade the scan?
For black-and-white documents, no: Group 4 is lossless and the compressed file reproduces the original image exactly. Loss appears only if you deliberately lower quality on a colour scan or a photograph.
How do I compress a multi-page TIFF?
Exactly like a single-page one — upload the whole file. Every page is re-compressed and comes back as one TIFF in the original order.
Does compression change the resolution?
No. DPI stays as it was, which matters when a scan has to meet a filing requirement such as 300 dpi — only the file size goes down.
What is the difference between TIFF and TIF?
Nothing but the number of letters. It is the same format; TIF dates from when Windows allowed only three characters in an extension.
Why will my TIFF not compress when it is not that heavy?
What matters is not the size on disk but the size in memory once unpacked. A small file with dozens of pages or a very high resolution may not fit into the memory of your plan. Split it into parts, lower the resolution or choose a plan with a higher limit.