Alfa Slab One
Alfa Slab One is a display font in 1 weight. Its lowercase letters are 16% wider than the typical display font. Last updated 5 September 2025.
Editing a PDF that uses Alfa Slab One
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 Alfa Slab One from the widths stored in your PDF, loads the complete open font, and sets your new text in Alfa Slab One itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 608.4 units per 1000 em |
|---|---|
| Average capital letter width | 783.3 units per 1000 em |
| Word space | 300 units per 1000 em |
| Digits | proportional (digit widths differ) |
| Spacing | proportional |
| Width of i compared with m | 33% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Display |
Weights and styles
Languages beyond basic Latin
Open fonts closest to Alfa Slab One
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.
- Platypi Regularloosely similar widths (33.9 units)
- Hepta Slab Regularloosely similar widths (41.6 units)
- Fraunces Regularloosely similar widths (44.5 units)
- Montserrat Alternates Regularloosely similar widths (45 units)
- Marhey Regularloosely similar widths (45.4 units)
- Montserrat Regularloosely similar widths (45.9 units)
- BioRhyme Regularloosely similar widths (46.1 units)
- Montserrat Underline Regularloosely similar widths (46.1 units)
Compare Alfa Slab One
Questions people ask
+Can I edit a PDF that uses Alfa Slab One?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Alfa Slab One itself, loaded from the open font, so the edit matches the rest of the page.
+Is Alfa Slab One free to use?
Alfa Slab One 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 Alfa Slab One?
By measured letter widths, Platypi is the closest match among open fonts (a mean difference of 33.9 units per 1000 em). Text set in one takes almost the same space in the other.
+Which languages does Alfa Slab One support?
It includes these character sets: Latin, Central European, Vietnamese.
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