Paste your transaction signature and get all the information you need.
Both versions are live today. Pick the CLI for terminal speed, or the web debugger for an interactive view.
Profile transactions straight from your terminal. Pipe to JSON, export CSV, or read the rendered TUI in real time.
A browser-based visual debugger — paste a signature, get an interactive flame graph, CPI tree and account state timeline.
Already broadcast? Decode it. Still drafting? Profile it before you sign.
Point OPEN at any confirmed transaction signature. It pulls the tx from the RPC and gives you the full profile — CU usage, CPI tree, account diffs.
Have a base64 transaction blob you haven't broadcast yet? Pass the path (or the blob itself) and open will simulate it against current state.
Built around the same questions you'd ask in Chrome DevTools — but for the SVM.
Per-instruction compute unit breakdown with hotspot detection.
Reconstructed from program logs — see who calls whom, and how deep.
Pre/post state for every touched account, decoded when possible.
Flags missing PDA bump caches, redundant CPIs, oversized account loads.
Outlier CU spikes vs. historical baseline for the same program.
Lamport breakdown — base fee, priority fee, rent, transfer totals.
See how the same logic would cost in Anchor, Pinocchio, or raw SVM.
Run analysis across a file of signatures and aggregate the report.
OPEN is MIT-licensed and open source. Try it on a real signature in 30 seconds.