Any utility to change the font of entire PDF document?

Nexutix · 11-19-2010, 10:58 AM

I have an ebook with usual Times New Roman font. My reader shows calibri as best font. How can I convert all text from times new roman to calibri?

frabjous · 11-19-2010, 11:21 PM

The only real way to change fonts in a PDF would be to convert it another format, change the font and then convert it back.

Think about what a PDF is. It tries to emulate a paper document. It's basically a map of the exact locations of individual letters/characters. Since characters are different sizes (both absolutely and more importantly, relative to each other) in different fonts, if you replaced the font with another font, but kept all the locations the same, the document would look very weird: some characters would overlap each other, and others would be too far apart. If you tried to rearrange their positions, lines of text would run off the page, etc.

So if you want a different font, you'd basically need to start from scratch with a completely new document. You could do this, of course, by using a conversion program to convert a PDF to HTML or RTF or something like that, and then edit it, and possibly convert it back. You could use a combination of calibre and your favorite word processor, or other software. However, conversion is always liable to introduce errors, and PDF conversion rarely goes smoothly. So do think about whether you can live with Times. (Though I find Times very boring and suboptimal for ebooks too.)

11-19-2010, 10:58 AM	#1
Nexutix Reading and reading Posts: 582 Karma: 8250144 Join Date: Oct 2010 Device: Infibeam Pi, iPod Touch 4G, iPad Air 2, iPad mini 2, Oneplus One	Any utility to change the font of entire PDF document? I have an ebook with usual Times New Roman font. My reader shows calibri as best font. How can I convert all text from times new roman to calibri?

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11-19-2010, 11:21 PM	#2
frabjous Wizard Posts: 1,213 Karma: 12890 Join Date: Feb 2009 Location: Amherst, Massachusetts, USA Device: Sony PRS-505	The only real way to change fonts in a PDF would be to convert it another format, change the font and then convert it back. Think about what a PDF is. It tries to emulate a paper document. It's basically a map of the exact locations of individual letters/characters. Since characters are different sizes (both absolutely and more importantly, relative to each other) in different fonts, if you replaced the font with another font, but kept all the locations the same, the document would look very weird: some characters would overlap each other, and others would be too far apart. If you tried to rearrange their positions, lines of text would run off the page, etc. So if you want a different font, you'd basically need to start from scratch with a completely new document. You could do this, of course, by using a conversion program to convert a PDF to HTML or RTF or something like that, and then edit it, and possibly convert it back. You could use a combination of calibre and your favorite word processor, or other software. However, conversion is always liable to introduce errors, and PDF conversion rarely goes smoothly. So do think about whether you can live with Times. (Though I find Times very boring and suboptimal for ebooks too.)

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