Lightweight ext4 filesystem library Icon

Lightweight ext4 filesystem library

ext2/3/4 library for microcontrollers

5.0 Stars (2)
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The main goal of the lwext4 project is to provide ext2/3/4 filesystem for microcontrollers. It may be an interesting alternative for traditional MCU filesystem libraries (mostly based on FAT32).

Lwext4 may be used with SD/MMC card, USB flash drive or other block based memory device. However it is not good for flash memory–based storage devices.

Code is also available on github:

Feel free to contact me:

Lightweight ext4 filesystem library Web Site


  • full ext2 support
  • partial ext3/4 support (extents & directory HTREE)
  • fast HTREE directory operations, recursive directory remove
  • small memory footprint (CODE: 20KB, RAM 8KB, STACK 2KB)
  • flexible cross platform CMake build system
  • demo application (file images or direct partition access)
  • client-server automatic test suite
  • only C standard library dependency


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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5


    Posted 08/27/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    This library is awesome! I can't recommend this lib for write access because it doesn't support all features but as a RO ext* library it's the best I've found. If you get unsupported features errors u can just ignore them if you use this lib RO.

    Posted 10/19/2014
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Intended Audience

Science/Research, Education, Developers

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