PNG vs TIFF: Comparing Two Lossless Image Formats
PNG and TIFF are both lossless — neither one discards image data the way a JPEG does — which sometimes leads to the assumption that they're interchangeable. They're not. Each was built for a different working context, and that shows up clearly in file size, feature set, and which software actually expects each one.
PNG: lossless, and built for the web
PNG was designed from the outset as a practical, broadly compatible format — every browser, every operating system, and nearly every piece of image software opens a PNG without issue. It supports transparency through an alpha channel, applies genuine (if modest) lossless compression to keep file sizes reasonable, and is the standard choice for screenshots, logos, icons, and any web graphic that needs a transparent background. What PNG doesn't do is support more advanced print-production features like multiple layers, CMYK color (the color model used in professional printing, as opposed to the RGB used on screens), or extensive embedded metadata.
TIFF: lossless, and built for print and archival work
TIFF was designed for a different audience — professional photography, scanning, and print production, where preserving every detail of an image and supporting advanced color and metadata handling matters more than small file size or web compatibility. TIFF supports CMYK color, high bit-depth images (more distinct color values per pixel than a standard PNG), extensive embedded metadata, and in many cases multiple layers within a single file. The cost is size: an uncompressed TIFF is often dramatically larger than an equivalent PNG, and even TIFF's own compression options tend to produce larger files than PNG's.
Where TIFF's advantages actually get used
Professional photographers and print shops favor TIFF specifically because it preserves the maximum detail a camera or scanner can capture, without the size-driven compromises that formats built for web delivery make. A photo destined for large-format printing, or a scanned document that needs to retain every detail for archival purposes, is where TIFF's extra fidelity and metadata capacity genuinely pay off. For anything that will only ever be viewed on a screen, though, that extra capacity mostly just adds file size without a visible benefit.
Compatibility is the practical dividing line
PNG opens everywhere without a second thought. TIFF is well supported by professional photo and design software, but plenty of everyday tools — most web browsers included — either can't open a TIFF at all or handle it awkwardly. That asymmetry is usually the deciding factor day to day: if an image needs to go on a website, get emailed casually, or be viewed by someone without specialized software, PNG is the safer choice regardless of TIFF's extra capabilities.
Deciding between them
For web graphics, screenshots, and anything needing broad compatibility: PNG. For professional photography, scanning, or print production where maximum fidelity and advanced color handling matter more than universal compatibility: TIFF, converting to a web-friendly format only at the final delivery step. The image converter handles moving between TIFF, PNG, and other formats, and Image Metadata lets you inspect what information is actually embedded in a file — useful when a TIFF is carrying more data than you expected, or when you want to confirm what's there before converting. Once you're in PNG for web use, Compress Image handles any further size reduction needed.