Free web tool

TIFF to JPG

Convert TIFF scans, microscope images and archive files to JPG, or to PNG. Multi-page TIFFs give one picture per page. Each file is decoded on your device, in this browser tab. Nothing is uploaded.

Drop TIFF files here Choose files TIFF, up to 100 MB each. You can also paste a file with Ctrl or Cmd V.

Options

Save as JPG PNG

JPEG quality 92 Fill transparent areas with

Pages First page All pages, as a zip

Bytes of your files sent anywhere: 0

Files are read and converted in this tab, in a background worker. The only requests the page makes are for its own scripts. Your files are never sent anywhere.

How it works

TIFF is the format of scanners, microscopes, archives and print shops. Only Safari opens it in a web page, and many upload forms refuse it. This page reads the TIFF itself: it walks the file's list of pages, decompresses each strip or tile, and turns the samples into pixels in a background worker.

The LZW and fax decoders come from UTIF.js, an open-source TIFF library, and the Deflate one from pako, both served from this site and loaded when you add a TIFF that needs them. JPEG-compressed TIFFs are decoded by the browser's own JPEG decoder.

16-bit images, common from microscopes and film scanners, are reduced to 8 bits for the JPG or PNG. Nothing is brightened, so a dim image stays dim; adjust it in Fiji or Photoshop first if it needs it. Scanner thumbnails stored inside the file are skipped, and the orientation the file records is applied.

How to convert TIFF to JPG

Pick the format and pages. JPG for photos and scans you will share, PNG to keep every pixel. First page or All pages for a multi-page TIFF.
Add the TIFFs. Drop the files on the box, click it to choose them, or paste one.
Wait for each row. The row shows the pixel size, or the number of pages, and any notes.
Download. Download each picture from its row, a multi-page TIFF as one zip, or everything with Download all as .zip.

Limits

Up to 100 MB a file, 40 megapixels a page (16.7 on a phone), and 500 pages at a time.
BigTIFF files, floating-point samples, files with each color in a separate plane, and old-style JPEG compression are refused with a message that says so.
16 bits per sample are reduced to 8; nothing is stretched or brightened.
Layers, extra channels beyond alpha, and the TIFF's metadata are not copied over.
Needs Chrome or Edge 69, Firefox 105 or Safari 16.4, or later.

Questions

Are my files uploaded?

No. The page reads each TIFF with your browser and converts it in a background worker in this tab. There is no server step. The meter under the drop zone counts the bytes the page and its worker send while they work, so you can check this yourself. The only things the page downloads are its own scripts and the TIFF decoder.

Does it handle multi-page TIFFs?

Yes. Choose All pages and each page becomes its own JPG or PNG, numbered in a zip. With First page, the row says how many pages the file has. Small preview images that scanners store next to the real pages are skipped.

Why is my microscope image dark?

Many cameras store 12 bits of data in a 16-bit TIFF, so the brightest pixel is far below the 16-bit maximum. Reduced to 8 bits, the picture looks dark. The page does not stretch it, so measurements are not changed silently; set the display range in Fiji or ImageJ and export from there if you need a brighter picture.

Which compressions work?

Uncompressed, LZW, Deflate, PackBits, CCITT Group 3 and Group 4 (fax and black-and-white scans) and JPEG. A TIFF in a compression the page cannot read gets a message naming it.

Should I choose JPG or PNG?

JPG for photos and color scans, where it is far smaller. PNG for black-and-white documents, line art and anything you will measure, since it keeps every pixel exactly.

Is it free?

Yes. There is no account, no watermark and no limit beyond the file sizes above.

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