TIFF to PNG Converter

TIFF comes out of scanners, fax software, cameras and print workflows, and Chrome, Edge and Firefox cannot display it. PNG is the natural replacement when nothing may be lost: it is lossless like most TIFFs, keeps transparency, and opens in every browser, editor and office program. This converter reads each TIFF page in your browser and saves it as a PNG, one file per page, without uploading anything.

How to use this tool

1. Drop one or more .tif or .tiff files.
2. Choose the first page, all pages (downloaded as a ZIP) or a list such as 1-3, 5.
3. Keep transparent areas, or fill them with white.
4. Download the PNG files.

Formula

Pages are found by following each image directory's "next IFD" offset from the TIFF header (II or MM, 42); reduced-resolution thumbnails are skipped. Each page is decoded and written as an 8-bit RGBA PNG.

A built-in reader handles strips and tiles that are uncompressed or use PackBits, LZW or Deflate, with 1, 4, 8 or 16 bits per sample: greyscale, RGB, palette and CMYK, with or without an alpha channel. JPEG-compressed pages go through the browser's JPEG decoder. CCITT fax pages and other rare layouts use the full ffmpeg decoder, a one-time download of about 30 MB. Pages with a TIFF orientation tag are turned upright. Old-style JPEG and floating-point TIFFs cannot be converted, and the result names the page and the reason.

Example

A two-page scan, contract.tiff, with "All pages" gives contract-p1.png and contract-p2.png plus a "Download all as ZIP" button. With "Choose pages" set to 2, only contract-p2.png is made. A 2480 × 3508 px A4 page at 300 dpi stays exactly 2480 × 3508 px.