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Fira Mono

Fira Mono is a monospace font in 3 weights. Its lowercase letters are about as wide as the typical monospace font. Last updated 16 September 2025.

Fira Mono: The quick brown fox jumps over the lazy dog 0123456789
Fira Mono Regular
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Editing a PDF that uses Fira Mono

Most PDFs embed only the letters they already use. Type a new letter and many editors either refuse or swap in a different font. MythosPDF recognises Fira Mono from the widths stored in your PDF, loads the complete open font, and sets your new text in Fira Mono itself. The rest of the page is carried over untouched.

Measured metrics

Average lowercase letter width600 units per 1000 em
Average capital letter width600 units per 1000 em
Word space600 units per 1000 em
Digitstabular (every digit is 600 units wide, so columns of numbers line up)
Spacingmonospaced
Width of i compared with m100%
Printable ASCII characters covered94 of 94
CategoryMonospace

Weights and styles

Languages beyond basic Latin

Open fonts closest to Fira Mono

Measured on every printable character both fonts contain. A smaller difference means the same words take the same space, so lines break in the same places.

  1. Maple Mono Regularidentical letter widths (0 units)
  2. Geist Mono Regularidentical letter widths (0 units)
  3. Google Sans Code Regularidentical letter widths (0 units)
  4. Hibur Mono Regularidentical letter widths (0 units)
  5. IBM Plex Mono Regularidentical letter widths (0 units)
  6. JetBrains Mono Regularidentical letter widths (0 units)
  7. Doto Regularidentical letter widths (0 units)
  8. Fira Code Regularidentical letter widths (0 units)

Compare Fira Mono

Questions people ask

+Can I edit a PDF that uses Fira Mono?

Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Fira Mono itself, loaded from the open font, so the edit matches the rest of the page.

+Is Fira Mono free to use?

Fira Mono is released under the SIL Open Font License 1.1, an open licence that allows free use in documents, including commercial ones. Check the licence text for your exact use.

+Which font is closest to Fira Mono?

By measured letter widths, Maple Mono is the closest match among open fonts (a mean difference of 0 units per 1000 em). Text set in one takes almost the same space in the other.

+Which languages does Fira Mono support?

It includes these character sets: Cyrillic, Cyrillic Extended, Greek, Greek Extended, Latin, Central European, More symbols.

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