How is it possible to determine the fonts used by text in PDF and TIFF files?
For TIFFs or any other raster (pixel) image, Jin's answer covers it.
For PDFs (assuming it's a 'proper' PDF and not a raster image embedded in a PDF, as produced by scanning/fax software), font information is embedded in the file.
In Adobe Reader, Adobe Acrobat, and Foxit Reader 3 -- probably slightly different in other applications -- File menu > Properties > Fonts tab gives you a list of all fonts used in the document.
There are also third-party plugins for Acrobat, such as Enfocus PitStop Pro, which add the ability to find/replace/report on instances of a particular font throughout a document.
If you need help identifying a font sample, there are lots of resources.
Some are automated, you submit a sample screenshot or go through a series of questions that help narrow the possibilities:
Some software can help find a font that's close to what you want:
Others are human-driven, where experts and enthusiasts may examine your submission:
Finally, there are services and programs designed to simply help you choose an appropriate font for a given use:
Just to add to the list a new software to identify fonts using an image or screen capture: "Find my Font" - http://www.findmyfont.com (I'm the developer of this software).
The application runs on either Mac-OS or Windows and identifies the fonts of a given bitmap image by searching for fonts both online (125.000+ free & commercial fonts) and on your computer while you are given a list of exact and similar matches + a % match for each one, in just 3-5 secs. It can use all kinds of color images without extra pre-processing.
protected by Mᴏɴᴋᴇʏ♦ Aug 5 '14 at 13:52
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