Choosing an Arabic font for a book means two separate questions: does it actually work for this content, and are you legally allowed to use it in something you're selling. Most guidance answers only one.
Font style decisions are made directly by Ata Rafi, Founder and Chief Formatter, based on the script and content each project actually needs.
Three things decide whether an Arabic font actually works for a book: the script style it's built for (Naskh or Nastaliq), whether its OpenType features correctly handle ligatures and contextual letterforms, and whether it supports the diacritic placement the content needs. Picking a font on appearance alone is how books end up with broken letter joining or misplaced tashkeel.
This page is about choosing and licensing the font itself. For how a font actually gets applied during layout, see Arabic Editorial Formatting or, for poetry-specific layout, Arabic Poetry & Diwan Formatting.
Upright, evenly-flowing letterforms sitting on a stable baseline. The standard for Quranic text, academic and reference publishing, and most general Arabic-language books.
Cursive, diagonally-flowing script sloping across the line. The expected style for Urdu literary and general publishing, and for Persian-language text.
Match the script to the language and genre convention readers already expect — not personal preference. See Urdu Book Formatting for the Naskh/Nastaliq decision in full depth.
Two fonts can both be labeled Naskh and still behave completely differently once real text runs through them. What actually determines that is the font's OpenType feature set:
This is checked before a font is used on a project, not assumed from its name or preview image.
A font being free to download says nothing about whether it can legally go into a book you're selling. That depends entirely on which license category it was released under — and free fonts fall into more than one category.
This isn't a hypothetical. A self-published author who used a font without the correct commercial license has publicly documented receiving a cease-and-desist notice over it — resolved only after providing proof of purchase for the correct license. Legal action against an individual author is rare, but the risk is real and on record, not an abstract worst case.
Foundries and licensing agencies do send these to authors and publishers found using a font outside its license terms.
Resolving a claim can mean paying for the correct commercial license after the fact, sometimes at a worse rate than buying it upfront.
A formatter who can't answer a licensing question directly is a warning sign on its own. See Red Flags to Avoid When Hiring an Arabic Book Formatter.
A license file that reads something like "free for personal use; commercial use, including resale, requires a separate license" — this wording rules out a book you intend to sell.
A license file that reads something like "licensed under the SIL Open Font License" or explicitly states free use for personal and commercial projects — this covers a commercially sold book.
Font style is selected as part of the formatting process, based on the content and script the project actually needs — Naskh for a scholarly Quranic text, Nastaliq for an Urdu literary work, and so on. Confirming the specific commercial license for a chosen font is the client's responsibility; Format Fix isn't a font vendor or a licensing authority, and this page exists to explain the categories clearly rather than to promise legal compliance on your behalf.
Questions about how this fits into a specific project are answered directly by Ata Rafi, Founder and Chief Formatter. See the portfolio for examples of font choices applied across real projects, or Pricing & Quote for what actually drives a project's cost.
Naskh is upright and sits on a stable baseline, used for Quranic text, academic work, and most general Arabic publishing. Nastaliq is cursive and flows diagonally across the line, used for Urdu literary and general publishing, and for Persian.
Only if its license explicitly allows commercial use — being free to download doesn't guarantee that. Many free Arabic fonts are released under the SIL Open Font License, which does permit commercial book publishing with no extra fee.
A widely-used open license that most free Arabic fonts, including much of Google Fonts' Arabic library, are released under. It permits use in a book or other print publication, commercial or not, with no additional permission required.
Cases are rare for individual authors, but real: at least one self-published author has documented receiving a cease-and-desist notice over an improperly licensed font, resolved by providing proof of the correct license after the fact.
Possibly — some licenses distinguish between display use and embedding a font's data directly inside a file. This is worth confirming specifically with the foundry rather than assuming a general commercial license covers it.
Font style is selected as part of formatting, matched to the content and script. Confirming the specific commercial license for that font stays the client's responsibility. Get in touch with questions about a specific project.
Related: how Arabic dialects and regional differences affect formatting.