TIFF is the heavy-duty image format of scanning and archival — it stores every pixel without compromise, producing files that are 30-50 MB for a single page.
Converting TIFF to PDF shrinks the file by 80-90% with no visible quality loss, makes it viewable on any device, and lets you combine dozens of scans into one multi-page document.
For the quickest conversion, use the TIFF to PDF converter — drag your TIFF files in and get a compressed, multi-page PDF in seconds.
Why TIFF Files Are So Large
TIFF is a flexible container format that can hold uncompressed, losslessly compressed, or lossy compressed image data. Its default mode is uncompressed — every pixel is stored as raw data bytes. A 600 DPI A4 colour scan at 24-bit is roughly 5100×7000 pixels, producing a 100+ MB file before compression. Adding LZW compression (lossless, like ZIP) brings it to 8-12 MB, which is still large for something that is ultimately a picture of a document.
TIFF is built for maximum fidelity — it supports 16-bit colour, multiple layers, transparency, and CMYK colour space. These features matter in pre-press and archival workflows but are wasted on a scanned document that only needs to be read and searched. PDF embeds the image with efficient compression, strips the overhead TIFF metadata, and produces a file that is a fraction of the size.
What Happens During Conversion
The converter reads the TIFF, extracts the pixel data, and embeds it in a PDF as an image stream. Depending on the settings, the image is either:
- JPEG-encoded (recommended): Applies JPEG compression at quality 95 to the embedded image. The visual result is identical to the TIFF original, but the file is 80-90% smaller. Best choice for most users.
- Flate Decode (lossless): Compresses the pixel data without any quality loss — the PDF is pixel-identical to the TIFF. File size is modestly smaller than the TIFF (maybe 30% reduction from LZW removal). Use this for archival-quality scans where pixel fidelity is non-negotiable.
- CCITT Fax (B/W only): For black-and-white text documents (contracts, forms, letters), CCITT Group 4 compression produces tiny PDFs (a few hundred KB per page) with perfectly crisp text.
Typical File Size Reductions
| TIFF type | Typical size | PDF with JPEG q95 | PDF with Flate (lossless) |
|---|---|---|---|
| Uncompressed colour (A4, 600 DPI) | ~35 MB | 3-5 MB | ~12 MB |
| LZW-compressed colour | 8-12 MB | 3-5 MB | 6-10 MB |
| B/W text document (CCITT) | 2-5 MB | 200-500 KB | 300-600 KB |
Multi-Page: Combine Many TIFFs Into One PDF
Many scanners produce one TIFF per page — scan001.tiff, scan002.tiff, and so on.
Converting them individually to PDF gives you 50 separate PDF files. Converting them to a single combined PDF gives you one file, neatly organised.
The TIFF to PDF converter accepts multiple files at once and combines them in the order you add them. Most tools let you drag to reorder before converting.
If you need a specific page order, rename the files with leading numbers (01, 02, 03) before uploading.
Making Scans Searchable with OCR
A TIFF is a picture — it has no text layer, so you cannot search or select words. Converting to PDF does not add text by itself, but the PDF can hold an invisible OCR text layer. After converting TIFF to PDF, run the resulting PDF through OCR PDF and the engine reads the text from the image, placing it behind the visible page as a searchable layer. The result looks the same, but now you can search, select, and copy text from the document.
When to Keep TIFF, When to Convert
- Keep TIFF: if you plan to further process the image (colour correction, retouching, enlargement) in Photoshop or professional software. TIFF is the master format for image editing.
- Keep TIFF: if the scan is for pre-press / CMYK / professional printing workflows. Print shops expect TIFF or PDF/X.
- Convert to PDF: for document archives — scans you will read, search, and share. PDF is universally viewable and much smaller.
- Convert to PDF: for distribution — sending someone a 35 MB TIFF they do not know how to open is worse than a 4 MB PDF they double-click and read.
Related Tasks
For making PDF scans searchable after conversion, use OCR for PDF . For the reverse — extracting images from a PDF — use PDF to TIFF . For combining other image formats into PDF, the JPG to PDF converter handles photographs and casual scans.
Quick Summary
- TIFF → PDF with JPEG embedding shrinks files 80-90%. A 35 MB scan becomes 3-5 MB with no visible quality loss.
- Use lossless Flate Decode for pixel-perfect archival. Smaller than TIFF, still pixel-identical.
- Combine multiple TIFFs into one PDF. One document, one file.
- Run OCR after conversion for searchable text. TIFF is a picture; PDF + OCR adds a searchable text layer.
- Keep TIFF as master for further editing. Convert to PDF for distribution and archiving.