Liberation fonts
open-source font superfamily
Liberation is the collective name of four TrueType font families: Liberation Sans, Liberation Sans Narrow, Liberation Serif, and Liberation Mono. These fonts are metrically compatible with the most popular fonts on the Microsoft Windows operating system and the Microsoft Office software package (Monotype Corporation's Arial, Arial Narrow, Times New Roman and Courier New, respectively), for which Liberation is intended as a free substitute. The fonts are default in LibreOffice.
Characteristics
Liberation Sans, Sans Narrow, Serif and Mono closely match the metrics of Monotype Corporation fonts Arial, Arial Narrow, Times New Roman and Courier New respectively. This means that the characters of each Liberation font are identical in width and height to those of each corresponding Monotype font. It allows the Liberation fonts to serve as free, open-source replacements of the proprietary Monotype fonts without changing the document layout.
Unicode coverage
All three fonts supported IBM/Microsoft code pages 437, 737, 775, 850, 852, 855, 857, 858, 860, 861, 863, 865, 866, 869, 1250, 1251, 1252, 1253, 1254, 1257, the Macintosh Character Set (US Roman), and the Windows OEM character set, that is, the Latin, Greek, and Cyrillic alphabets, leaving out many writing systems. Extension to other writing systems was prevented by its unique licensing terms. Since the old fonts were replaced by the Croscore equivalents, expanded Unicode coverage has become possible.
History
The fonts were developed by Steve Matteson of Ascender Corporation as Ascender Sans and Ascender Serif.
Begin with the source’s own compact description: “Liberation fonts” is open-source font superfamily. The dossier treats that line as a proposition to test through Liberation, fonts and open-source, not as a finished interpretation.
Why this record matters
The phrase “open-source font superfamily” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated May 23, 2026. The linked authority identifier is Q245722. 2 of 5 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1250, 1251, 1252 and 1253.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
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The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Liberation fonts”, its source revision and the description used here.
- Expand the search: follow Liberation fonts primary sources, Liberation fonts archive and Liberation research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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This entry incorporates text from “Liberation fonts” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.