TIFF to PNG Converter

A TIFF to PNG converter rewrites a TIFF or TIF image as a PNG without throwing detail away. Both formats are lossless, so this is not a trade of quality for size the way converting to JPG is. The reason to switch is reach: PNG is a web standard that every browser, document editor and image viewer opens, while TIFF is at home in scanners, print workflows and archives and is shown as a download prompt in many other places. Converting keeps the picture exact and moves it somewhere people can see it.

The TIFF is read by UTIF, an open source decoder this page downloads when you add the first TIFF. It reads uncompressed TIFFs, LZW, ZIP (Deflate), PackBits and JPEG compression, and the CCITT fax codecs used for black-and-white documents. Black-and-white, grayscale, palette and RGB images all convert. An alpha channel in the TIFF comes through as transparency in the PNG, and the row thumbnail and the preview that opens when you click it sit on a checkerboard so you can see it.

There are limits worth knowing before you convert an archive. The image passes through a browser canvas, which holds 8 bits per channel, so a 16-bit TIFF is written as an 8-bit PNG. Only the first page of a multi-page TIFF is converted, and the note under the file's row gives the page count. The small preview images some TIFFs carry are skipped and not counted as pages. A file using a compression method the decoder cannot read is refused with the method code in the message.

Everything is client-side. Your browser decodes the TIFF, draws it and encodes the PNG, so the file is never uploaded. EXIF fields, GPS coordinates, color profiles and the TIFF's print resolution (its dpi value) are not copied into the PNG; the pixel dimensions stay the same. TIFF files over 300 MB and images over 100 megapixels are refused with a message rather than freezing the tab. You can add a batch and save it as one ZIP, free, no signup, with a daily cap on conversions.

Files are identified by their first bytes, not their names, so a DNG or CR2 camera RAW file, which shares the TIFF structure, is recognized and sent to the right converter instead.

• Compression it reads: none, LZW, ZIP (Deflate), PackBits, JPEG, and CCITT Group 3 and Group 4 fax compression.
• Compression it refuses: anything else, such as JPEG 2000 or newer methods like Zstandard. The message names the method by its code instead of saving a blank image.
• Pages: the first full-resolution page is converted. Reduced-resolution previews stored alongside it are skipped and do not count toward the page total in the note.
• Bit depth: 1-bit black-and-white, 8-bit and 16-bit images convert. Anything above 8 bits per channel is brought down to 8.
• Transparency: an alpha channel in the TIFF is written as PNG transparency.

• Decoding and PNG encoding both happen inside this browser tab. The TIFF decoder script is downloaded once; your images are never uploaded.
• The daily limit check sends the tool name and a device identifier, plus your account token if you are signed in, and nothing from the files.
• After a batch, only the number of converted files, their total size in bytes and the output format are recorded.
• The conversion still runs if the limit check cannot reach the server.
• The PNG is built from pixels alone, so EXIF fields, GPS coordinates, color profiles and dpi values are left behind.
• Results are held in the tab's memory until you remove them, press Clear All or close the page, and no copy is kept on a server.