LibreLane makes a lot of output files! This can be quite confusing when you’re getting started.

Here’s a useful spreadsheet I made to show:

• the path of the files
• most important files and what they mean
• which tool creates which file

Thanks Amr and Ahmed for helping me with this!

The spreadsheet was updated for LibreLane in 2025.

LibreLane summary tool

I’ve also made a summary tool: https://github.com/mattvenn/librelane_summary

This allows you to easily:

• browse and pick a specific results directory
• get a summary of violations
• get a summary of antenna issues
• show usage of standard cells
• easily view the various stages of the LibreLane ASIC flow: floorplanning, power distribution, placement and the final GDS.

• tools