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TIFF to PDF Converter
This free TIFF to PDF converter turns TIFF images — including multi-page TIFF scans — into a clean PDF, right in your browser. Every frame of the TIFF becomes one page of the PDF, in order and at full resolution, ready to share, upload or archive. Nothing is uploaded: the decoding and the PDF building both happen on your own device.
Nothing leaves your device. Your TIFF is decoded and converted locally in your browser. The TIFF decoder libraries (UTIF.js and pako) load from the jsDelivr CDN (cdn.jsdelivr.net) because browsers cannot read TIFF on their own — only the libraries travel over the internet, never your file.
How to use this converter
- Click the drop box (or drag your TIFF onto it) and choose the file. The box confirms the file name and size.
- The tool decodes the TIFF and lists its frames — check the frame count matches your document's pages.
- Choose the PDF page size: A4 or Letter pages with each frame fitted, or pages that match the image size.
- Press Convert to PDF, then Download .pdf to save the finished document.
How it works
TIFF is the format scanners, fax systems and archives have used for decades, because it stores images losslessly and can hold many pages — called frames — inside a single file. It is a poor format for sharing, though: most phones cannot open it, browsers cannot display it, and the files are often enormous. PDF is the opposite — universal, compact and page-based. Converting TIFF to PDF means decoding each frame back into pixels and placing those pixels, one frame per page, into a PDF document.
Browsers cannot read TIFF natively, so this tool decodes it with two open-source libraries loaded from the jsDelivr CDN: UTIF.js, a TIFF decoder written in JavaScript, helped by pako for the frames that use Deflate compression. Together they handle the TIFF variants that scanners and fax software actually produce:
| TIFF compression | Where you meet it | Supported? |
|---|---|---|
| None (uncompressed) | Scanner defaults, archives | Yes |
| LZW | Graphics and DTP software | Yes |
| Deflate / ZIP | Modern imaging software | Yes |
| PackBits | Older Mac and fax files | Yes |
| JPEG inside TIFF | Some scanner drivers | Yes |
| CCITT Group 3 / 4 | Fax documents | Yes, via UTIF.js |
Each decoded frame is drawn to a canvas at its full pixel size — a 300 DPI A4 scan arrives as a 2480 × 3508 pixel image and is placed in the PDF at that resolution, stored as a 92%-quality JPEG so the PDF stays a sensible size while looking identical to the original. With the A4 and Letter settings, each frame is fitted inside the page keeping its shape, and the page turns landscape automatically for wide frames. With "Match image size", the PDF page takes the frame's own proportions, sized as if printed at 150 DPI:
The whole job — decoding, drawing, PDF building — runs in your browser tab. Very large TIFFs (hundreds of megabytes, or dozens of huge frames) can take a while and use a lot of memory; if a file struggles, converting it in a desktop TIFF tool first, or splitting it into smaller TIFFs, is the practical workaround.
Worked example
A property agent receives a registered deed scanned by the registrar's office as a single TIFF file with 3 frames — the deed's three pages — and must upload it to a portal that accepts only PDF.
Step 1: He drops the TIFF into the box. The tool confirms the file and decodes it.
Step 2: The frame list shows 3 frames, each 2480 × 3508 pixels — A4 pages scanned at 300 DPI, matching the deed.
Step 3: He keeps the default A4 pages setting and presses Convert to PDF.
Step 4: He presses Download .pdf and saves tiff-to-pdf.pdf.
The result is a 3-page A4 PDF — one scanned page per PDF page, in order, at full scan sharpness — and far smaller than the TIFF it came from, ready for the portal.
FAQ
Is my TIFF uploaded to a server?
No. Your TIFF is decoded and turned into a PDF entirely in your browser, and the finished file is built on your own device. Two decoder libraries (UTIF.js and pako) are loaded from the jsDelivr CDN to read the TIFF format — only those libraries travel over the internet, never your file.
What happens with a multi-page TIFF?
Every frame of the TIFF becomes one page of the PDF, in the same order. A scanned 12-page document saved as a single multi-page TIFF comes out as a 12-page PDF. The tool tells you how many frames it found before you convert, so you can check the count against your document.
Which TIFF files are supported?
The common kinds: uncompressed TIFFs and TIFFs compressed with LZW, Deflate (ZIP), PackBits or JPEG, in colour, greyscale or black-and-white. These cover virtually all scanner and fax output. Rare laboratory or camera variants with unusual colour spaces may fail to decode — the tool will say so plainly rather than produce a broken PDF.
Will the PDF be the same quality as the TIFF?
The pages are placed at their full pixel resolution, so nothing is thrown away when the frames are read. To keep the PDF a sensible size, each frame is stored as a high-quality JPEG (92% quality) — for scanned documents and photos this is visually identical to the original. A 300 DPI scan stays a sharp 300 DPI page image.
Why is my TIFF file so large, and will the PDF be smaller?
TIFF is an archive format that often stores images with no compression at all, so a single scanned A4 page can be 25 MB or more. The PDF stores the same pages as quality JPEGs, which usually makes the result ten to twenty times smaller while looking the same — one reason TIFF to PDF conversion is the standard way to share scans.