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What is Font Subsetting?

April 26, 2017font subsetting

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What is Font Subsetting?

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Most TrueType and OpenType fonts are too large if they were to be entirely embedded in an output PDF file. Most of the available characters of a font are normally not used, so that there is no need to embed them. The process of embedding only those characters required is called font subsetting.This technique reduces the file size significantly and also enables the usage of very large CJK fonts which often require more than 20 MB disk space. A font subset is very small, depending on the number of used characters, only a few KB disk space are required.