Made this for react native while going through crashes in crashlytics.
- React native:
npx react-native bundle --entry-file *entry file* --bundle-output='*outfile*.jsbundle' --dev false --sourcemap-output='./*outfile*.map'
npx rn-crashlytics-symbolication-tool
Give it a .map file and paste (or just have it read from clipboard) your trace text and it will output a human-readable string