Oxygen
Oxygen is a sans serif font in 3 weights. Its lowercase letters are 3% narrower than the typical sans serif font. Last updated 5 September 2025.
Editing a PDF that uses Oxygen
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 Oxygen from the widths stored in your PDF, loads the complete open font, and sets your new text in Oxygen itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 504.1 units per 1000 em |
|---|---|
| Average capital letter width | 630.7 units per 1000 em |
| Word space | 249.5 units per 1000 em |
| Digits | proportional (digit widths differ) |
| Spacing | proportional |
| Width of i compared with m | 29% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Sans serif |
Weights and styles
Languages beyond basic Latin
Open fonts closest to Oxygen
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.
- Noto Sans Syriac Eastern Regularsimilar widths (26.2 units)
- Noto Sans Syriac Regularsimilar widths (26.2 units)
- Noto Sans Syriac Western Regularsimilar widths (26.3 units)
- Noto Sans Thaana Regularsimilar widths (26.4 units)
- Noto Sans Hebrew Regularsimilar widths (26.5 units)
- Open Sans Regularsimilar widths (26.8 units)
- Noto Kufi Arabic Regularsimilar widths (27.2 units)
- Noto Sans Tamil Regularsimilar widths (27.2 units)
Compare Oxygen
Questions people ask
+Can I edit a PDF that uses Oxygen?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Oxygen itself, loaded from the open font, so the edit matches the rest of the page.
+Is Oxygen free to use?
Oxygen 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 Oxygen?
By measured letter widths, Noto Sans Syriac Eastern is the closest match among open fonts (a mean difference of 26.2 units per 1000 em). Text set in one takes almost the same space in the other.
+Which languages does Oxygen support?
It includes these character sets: Latin, Central European.
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