Decode a stack trace

A crash report from an obfuscated build shows renamed symbols. Paste the rename map that came with your Pro download and the stack trace, and get your original names back. Everything happens in this request — nothing is stored.

How it works

For sensitive crash reports, download the .NET 8 client and decode locally. This command requires no account, API key or network connection:

This is a desktop/CI tool requiring the .NET 8 runtime, not an iOS or Android app. If you download the ZIP on a phone, save it in Files or Downloads and transfer it to your computer to run it.

dotnet FreeObfuscator.BuildClient.dll --decode MyApp.map.txt crash.txt decoded.txt

Use the map from the exact protected build and keep it private. Existing output files are never overwritten. Name restoration cannot recover missing stack frames or source line numbers.

  • The map is the .map.txt file bundled in your obfuscated .zip when you tick Include rename map. It is a Pro feature and is never stored on our servers.
  • Any frame whose names are in the map is rewritten back to the original type and method; frames the map does not cover are left unchanged.
  • Keep the map private — it is exactly what undoes the renaming. Prefer decoding locally for sensitive traces; this page keeps nothing, but the map still crosses the network when you paste it here.