JSON Validator
Check if your JSON is syntactically correct. Get detailed error messages with line and column numbers. 100% client‑side.
📖 How to Validate JSON – Step by Step
- Step 1: Paste your JSON data into the text area.
- Step 2: Click “Validate JSON” – the tool checks syntax instantly.
- Step 3: If valid, a green success message appears. If invalid, you'll see the exact error with line and column numbers.
- Step 4: Use “Clear” to reset, or load a sample valid/invalid JSON to test the tool.
- Step 5: Fix your JSON based on the error details and re‑validate.
💡 Why Validate JSON?
- ✔️ Catch syntax errors before using JSON in APIs or config files.
- ✔️ Find missing commas, brackets, or quotes quickly.
- ✔️ Ensure your data is well‑formed for parsing.
- ✔️ 100% client‑side – your data never leaves your browser.
💡 Pro Tip: Common JSON errors include trailing commas, unquoted keys, and mismatched brackets. The validator pinpoints the exact location to help you fix them fast.
🔒 100% client‑side • Your data never uploaded • Instant validation • Zero tracking