mainLibreDWG - Summary

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Id: #10374
System Name: libredwg
Name: LibreDWG
Group Type: Official GNU software

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This project is part of the GNU Project.

This website is mostly intended for developers and maintainers. For general information on the project, please check

If you're looking for information on how to contribute, check the hackers' wiki at

LibreDWG was based on LibDWG (, which is written with variable names, documentation and comments in Esperanto.

There are also cmdline tools and libraries to read and write DWG files, with converters for various formats: DXF, DXFB, SVG, PS, JSON
and a SaveAs functionality, to convert between the various DWG versions.
It can read r13-r2021 DWG and ascii DXF, write r13-r2000 DWG, write r11-r2021 ascii DXF (binary not yet). It supports much more object types than any other free DWG library.

Registration Date: Sat 24 Oct 2009 10:23:48 PM UTC
License: GNU General Public License v3 or later
Development Status: 4 - Beta


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libredwg-0.12.4 released
     posted by reini_urban, Tue 06 Apr 2021 12:40:01 PM UTC - 0 replies

Fixed many more minor fuzzing errors.
See and

Here are the compressed sources: (17.4MB) ...

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libredwg-0.12.3 released
     posted by reini_urban, Fri 26 Feb 2021 09:23:31 AM UTC - 0 replies

Add llvmfuzz and oss-fuzz integration, fixed many minor fuzzing errors. libfuzzer is much better than afl++ and honggfuzz.

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Here are the compressed sources: ...

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libredwg-0.12.2 released
     posted by reini_urban, Mon 22 Feb 2021 05:47:48 PM UTC - 0 replies

Minor bugfix:

  • Fixed extending the write buffer for the 2 CRC bytes. Occurs very seldomly (GH #315)

See and

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libredwg-0.12.1 released
     posted by reini_urban, Sun 31 Jan 2021 05:04:34 PM UTC - 0 replies

LibreDWG version 0.12.1 - 2021/01/31 - beta:

Major bugfixes:
  * fixed dwg_bmp() and dwgbmp for >= r2004. Wrong dat offset.
  * Fixed EED with code 3 for layer handles. (Fixes GH #310, shanzhugit)
  * Fixed bit_convert_TU utf8 conversion with ubsan, wrong endian-ness. ...

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