Martian Mono
Martian Mono is a monospace font in 8 weights, also available as a variable font. Its lowercase letters are 17% wider than the typical monospace font. Last updated 16 September 2025.
Editing a PDF that uses Martian 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 Martian Mono from the widths stored in your PDF, loads the complete open font, and sets your new text in Martian Mono itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 700 units per 1000 em |
|---|---|
| Average capital letter width | 700 units per 1000 em |
| Word space | 700 units per 1000 em |
| Digits | tabular (every digit is 700 units wide, so columns of numbers line up) |
| Spacing | monospaced |
| Width of i compared with m | 100% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Monospace |
Weights and styles
Languages beyond basic Latin
Open fonts closest to Martian 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.
- League Mono Regularvery close widths (10 units)
- Major Mono Display Regularloosely similar widths (40 units)
- Azeret Mono Regularloosely similar widths (50 units)
- B612 Mono Regularloosely similar widths (50 units)
- Libertinus Mono Regularloosely similar widths (60 units)
- Atkinson Hyperlegible Mono Regularloosely similar widths (68 units)
- Monaspace Xenon Regularloosely similar widths (80 units)
- Monaspace Radon Regularloosely similar widths (80 units)
Compare Martian Mono
Questions people ask
+Can I edit a PDF that uses Martian Mono?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Martian Mono itself, loaded from the open font, so the edit matches the rest of the page.
+Is Martian Mono free to use?
Martian 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 Martian Mono?
By measured letter widths, League Mono is the closest match among open fonts (a mean difference of 10 units per 1000 em). Text set in one takes almost the same space in the other.
+Which languages does Martian Mono support?
It includes these character sets: Cyrillic, Cyrillic Extended, Latin, Central European.
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