1. Prepare
Paste a JSON sample. Example: {"id":1} is syntactically valid, while {"id":1,"id":2} contains a duplicate key.
JSON Validator
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Input
Output
Ready3 lines43 bytesUTF-8
- Status
- Ready
- Input size
- 98 bytes
- Output size
- 43 bytes
- Top-level keys
- 4
- Format
- Ready
Ready
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Practical usage guide
Practical usage guide
A practical workflow for JSON Validator
Validate JSON syntax, duplicate keys and supported complexity limits, then inspect payload structure without schema or business-rule validation.
2. Review
Inspect diagnostics and their positions before using the summary. Resolve DUPLICATE_KEY findings as well as syntax errors; repeated keys can hide overwritten values downstream.
3. Apply
The validator checks syntax, duplicate keys and supported input limits. It does not validate JSON Schema, required business fields or the receiving API contract.
Verification before operational use
- Use a representative case with the inputs needed to reproduce it.
- Confirm the result in the authorized target environment when runtime versions, namespaces, extensions, permissions or system configuration can change the outcome.
- Record the source, assumptions, tool settings and expected result so another reviewer can reproduce the check and distinguish verified facts from recommendations.
