The Architect's TIFF Files That No One Could Open
A construction project I was working on needed the site survey drawings shared across five different stakeholders — the client, two contractors, a planner, and a solicitor. The surveyor had delivered everything as TIFF files, 600 DPI, scanned from original drawings. Not one of those five recipients could open them without special software they didn't have. Converting to PNG kept the precision and made the files openable on any device, in any browser, without installing anything.
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TIFF: the professional format that travels badly
TIFF is the format that professional imaging workflows settled on because it can handle everything: 16-bit color, CMYK, multiple compression schemes, embedded ICC profiles, multiple pages. It's enormously flexible for the tools that understand it — scanners, print workflows, medical imaging software. Outside that context, it's a format that no browser supports natively and that most consumer software either rejects or opens incorrectly. Converting to PNG gives you the same lossless quality in a format that works everywhere.
The survey situation — what went wrong and how we fixed it
The surveyor's deliverables were technically perfect. High-resolution scans, lossless TIFF compression, correct georeferencing metadata embedded. For someone with professional surveying software, ideal files. For a building contractor who wanted to review them on a laptop or tablet, useless.
When I converted them to PNG, three things happened: the files opened instantly in every browser, the resolution stayed the same (the pixel grid from the TIFF transferred exactly to the PNG), and the file sizes actually decreased — the TIFF had been using uncompressed storage while PNG's DEFLATE compression found significant redundancy in the line-art drawings. The 45MB TIFF became a 9MB PNG. Same image, same quality, one-fifth the size.
Where TIFFs come from — and why that matters for conversion
TIFF isn't a single format — it's a container that can hold very different types of image data. What you have inside your TIFF determines how the conversion behaves:
- Flatbed scanner output (8-bit RGB): Converts cleanly to 8-bit PNG with no quality change. The most common case for documents and drawings.
- High-end photo scanner or camera export (16-bit): Maps to a 16-bit PNG, which most browsers and image tools handle correctly. Precision is preserved.
- CMYK TIFF from print workflows: Converted to RGB for PNG compatibility. Color accuracy depends on the conversion profile — verify the output if color matching is critical.
- Medical or scientific imaging (32-bit, floating point): This is a specialized case. Verify the output carefully — the conversion will produce something viewable but the full dynamic range may be remapped.
For most TIFFs that came from a scanner, a camera, or professional design software, the conversion is clean and straightforward.
TIF-to-PNG vs. TIF-to-JPG — which to choose
The right output format depends on what's in the TIFF and what you need to do with it:
- Scanned documents, drawings, or anything with text: PNG. Lossless keeps text razor-sharp. JPG creates compression artifacts around characters and lines.
- Photographs you're delivering to a website: Consider JPG or WebP. PNG will be unnecessarily large for photographic content that doesn't need lossless quality.
- Technical diagrams, architectural drawings, maps: PNG. The sharp lines and precise detail that matter in technical drawings are preserved losslessly.
- Files you'll edit further: PNG as an intermediate, then JPG/WebP for final delivery.
Sensitive content note
TIFFs often come from scanners that have processed contracts, identity documents, and invoices. Files are processed over HTTPS in temporary storage and deleted automatically when the conversion finishes. No account needed, no retention.
Frequently Asked Questions
My scanner saves TIFFs at 600 DPI. Does the PNG keep that resolution?
PNG stores the pixel grid at whatever resolution the TIFF contained — pixel-for-pixel identical. DPI metadata may or may not be preserved depending on what the TIFF had embedded, but the actual image dimensions (pixel width × height) are always preserved exactly.
Why won't my TIF open in a browser when I try to share it?
No mainstream browser supports TIFF natively. PNG, JPG, WebP, and AVIF all display natively in every modern browser. Converting to PNG is the simplest fix.
Will the PNG be smaller than the TIF?
Often yes. An uncompressed TIFF can compress dramatically with PNG's DEFLATE algorithm, especially for scanned line art and documents. A TIFF already using LZW compression may produce a similarly-sized PNG.
Can I batch convert multiple TIF files?
Yes. Upload up to 30 TIF files and download the resulting PNGs as a ZIP.
Are my files stored after conversion?
No. Files are deleted automatically as soon as the conversion job completes.
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