https://interpretron.vercel.app/
Have been using this for development where novel scripts are involved. Works with testnet and mainnet transactions.
If you post a rawtx in the top box and wait a few seconds it will grab input transcations and run the script interpreter to evaluate all scripts, giving you a stack and error code and whether or not everything validated.
Useful to try debug more complex scripts if you’re developing outside of sCrypt for example.