TIFF to BMP Converter

TIFF scans and exports open in few lightweight programs, while BMP opens almost anywhere on Windows — including old software, label printers, signage players and embedded tools. This converter reads each TIFF page in your browser and writes a standard BMP: 24-bit colour, 32-bit with transparency, or 8-bit greyscale for scans. The page's DPI is carried over.

How to use this tool

1. Drop one or more .tif or .tiff files.
2. Choose the first page, all pages, or a list such as 1-3, 5.
3. Pick the BMP type; for 24/8-bit choose the colour for transparent areas.
4. Download the BMPs, one per page (several come as a ZIP).

Formula

Each page → 8-bit RGBA → BMP: 54 bytes of headers (122 for 32-bit; plus a 1,024-byte palette for 8-bit) + height × row, where row = width × bytes per pixel rounded up to a multiple of 4.

A built-in reader handles strips and tiles, uncompressed, PackBits, LZW and Deflate data, 1/4/8/16-bit greyscale, RGB, palette and CMYK pages and alpha channels; JPEG-compressed pages use the browser's JPEG decoder and rare layouts the ffmpeg engine (about 30 MB, once). The TIFF's X resolution becomes the BMP's pixels per metre unless you pick a DPI.

Example

Page 2 of a 160 × 100 px TIFF saved as 8-bit greyscale takes 14 + 40 + 1,024 + 100 × 160 = 17,078 bytes; its green (22, 163, 74) becomes grey level 0.299 × 22 + 0.587 × 163 + 0.114 × 74 ≈ 111. As 24-bit colour it would be 54 + 100 × 480 = 48,054 bytes.