JSON Validator

VerifiedLocal processingmoderate sensitivity

JSON Validator

Check whether JSON text is valid and show the browser parser error

Workbench

Use JSON Validator

Inputs are not saved by the workspace.

Input JSON

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Known limitations

Validation reports the browser engine's error message and does not guarantee a stable line/column location.
Text input is measured after UTF-8 encoding.
Processing runs in the current browser tab.

Standards and references

RFC 8259 — The JavaScript Object Notation (JSON) Data Interchange Format

Understand the result

How to validate JSON without uploading sensitive data Common JSON errors and how to fix them

JSON Formatter JSON Minifier YAML Formatter YAML Validator

These links carry no input or output. Cross-tool payload handoff is kept in memory only when a compatible tool explicitly offers it.