I wrote a little web tool to make reading and understanding DXF files easier:
https://alek-tron.com/DxfExplorer/
It's nothing fancy and not a DXF viewer like you can already find plenty.
The DXF file is parsed on a very high level and just brought into a more readable format than what a normal text editor would give you. Filtering for Group Codes and values makes it easy to e.g. follow handles.
It already helped me a lot in developing tools that want to read DXF files.
The files are processed 100% client side. No file names, paths or file content gets sent anywhere.
Maybe this is useful to someone.