JSON repair tool

Fix broken JSON from AI.

Paste messy JSON. Get valid JSON back.

Broken Input Healed Output

Deterministic engine, zero unsafe repairs, benchmarked against real AI failures — Why does our tool keep getting better? →

Fix structure. Verify truth. Reduce risk.

datatool.dev starts with JSON repair because malformed AI output breaks workflows fast. The next layer is verification: checking answers, evidence, and confidence before you trust the result.

JSON repair guide Fact checker preview Fix JSON from AI Verify AI answers Why AI hallucinates