Project Summary
GnuCOBOL is a free, modern COBOL compiler. GnuCOBOL implements a substantial part of the COBOL 85, COBOL 2002 and COBOL 2014 standards and X/Open COBOL, as well as many extensions included in other COBOL compilers.
GnuCOBOL translates COBOL into C and compiles the translated code using a native C compiler. Build COBOL programs on various platforms, including GNU/Linux, Unix, Mac OS X, and Microsoft Windows. GnuCOBOL has also been built on HP/UX, z/OS, SPARC, RS6000, AS/400, along with other combinations of machines and operating systems.
While being held to a high level of quality and robustness, GnuCOBOL does not claim to be a “Standard Conforming” implementation of COBOL.
GnuCOBOL passes over 9600 of the NIST COBOL 85 test suite tests and over 750 internal checks during build.
In a Nutshell, GnuCOBOL (formerly OpenCOBOL)...
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has a well established, mature codebase
maintained by a large development team
with increasing Y-O-Y commits -
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took an estimated 98 years of effort (COCOMO model)
starting with its first commit in November, 2001
ending with its most recent commit 2 days ago
GNU General Public License v2.0 or later
Permitted
Commercial Use
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Distribute
Place Warranty
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Sub-License
Hold Liable
Required
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Disclose Source
Include Copyright
State Changes
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.
GNU General Public License v3.0 only
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Forbidden
Sub-License
Hold Liable
Required
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.
GNU Lesser General Public License v2.1 or later
Permitted
Commercial Use
Modify
Distribute
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
GNU Lesser General Public License v3.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Forbidden
Sub-License
Hold Liable
Required
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 )
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryJul 29 2025 — Aug 28 2025
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12 Month SummaryAug 28 2024 — Aug 28 2025
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