TIFF to PDF Converter

Scanners, fax software and document archives still produce TIFF files, often with many pages in one file, and most people can only open them as PDF. This converter turns every page of one or many TIFFs into a PDF page at its true size, worked out from the resolution stored in the file, or fitted to A4 or Letter. Black-and-white fax pages are copied into the PDF unchanged, so they stay sharp and small. It all runs in your browser.

How to use this tool

1. Choose one or more .tif or .tiff files.
2. Choose one PDF for everything or one per TIFF, and which pages to include.
3. Keep "True size" or fit the pages to A4 or Letter with a margin.
4. Pick how images are stored, then download the PDF.

Formula

Page width = pixel width ÷ horizontal dpi × 72 pt, and height the same with the vertical dpi, so a 1728 × 2200-pixel fax at 204 × 196 dpi becomes an 8.47 × 11.22 in page. Fax-mode pages often have different horizontal and vertical resolutions; using both keeps the proportions right.

CCITT Group 3 and 4 fax pages are copied into the PDF as they are. Other pages are decoded (uncompressed, PackBits, LZW, Deflate and JPEG by a built-in reader; anything else by the full decoder engine, a one-time download of about 30 MB) and stored losslessly or as JPEG.

Example

A 3-page fax scan.tif (Group 4, 1728 × 2292 px at 204 × 196 dpi) becomes a 3-page PDF of 8.47 × 11.69 in pages — close to A4 — and the PDF is about the same size as the TIFF, because the fax data is copied rather than re-encoded.