Project Summary
Liblouis is an open-source braille translator and back-translator. It features support for computer and literary braille, supports contracted and uncontracted translation for many, many languages (Arabic, Armenian, Bulgarian, Chinese, Croatian, Czech, Danish, Dutch, English, Esperanto, Estonian, Finish, French, Gaelic, German, Greek, Icelandic, Italian, Lithuanian, Norwegian, Polish, Portuguese, Romanian, Russian, Slovakian, Spanish, Swedish, Turkish, Vietnamese, Welsh) and has support for hyphenation. New languages can easily be added through tables that support a rule- or dictionary based approach. Included are also tools for testing and debugging tables. Liblouis also supports math braille (Nemeth and Marburg). The formatting of braille is provided by the companion project liblouisxml.
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In a Nutshell, liblouis...
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has a well established, mature codebase
maintained by a very large development team
with stable Y-O-Y commits -
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took an estimated 17 years of effort (COCOMO model)
starting with its first commit in January, 2008
ending with its most recent commit 22 days ago
Quick Reference
GNU Lesser General Public License v3.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
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Sub-License
Hold Liable
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Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummarySep 10 2026 — Oct 10 2026
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12 Month SummaryOct 10 2025 — Oct 10 2026
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