JSON Tools for Validation, Schema Checking, Debugging & Development
Validate JSON syntax and schemas, diagnose parser errors, debug API responses, compare payloads, test JSONPath, convert formats and learn the formats developers encounter around JSON.
Debugging & developer tools
JSON Error Encyclopedia
Diagnose unexpected tokens, trailing commas, quote errors, invalid escapes, incomplete JSON and parser failures.
Check JSON for Errors
Locate syntax problems and understand where a parser gets stuck.
Fix Invalid JSON
Repair common malformed JSON problems and verify the corrected payload.
JSON Schema Validator
Validate JSON structure, required fields, types, arrays, patterns, enums and common constraints.
JSON Diff & Compare
Compare two JSON documents and find added, removed and changed paths.
JSONPath Tester
Test JSONPath expressions against JSON and preview matching values.
JSON to TypeScript
Infer a useful TypeScript type from sample JSON for API integration.
Flatten / Unflatten JSON
Convert nested JSON to dot/bracket paths and reconstruct it again.
JSON Escape / Unescape
Escape text for JSON strings or decode escaped JSON string content.
JSON Sorter
Sort object keys recursively while preserving array order and values.
JSON formats, API debugging & parser guides
Use these guides when the problem is not simply “format this JSON”: schema contracts, path syntax, JSON-like formats, streaming records and language-specific parser failures.
JSON Schema Guide
Understand structure, required fields, types, properties, arrays and constraints.
JSON Pointer vs JSONPath
Choose exact RFC-style paths or query-style JSON selection.
JSON5 vs JSON
Compare comments, trailing commas, relaxed syntax and interoperability.
JSONC: JSON with Comments
Understand commented configuration and strict JSON compatibility.
NDJSON / JSON Lines
One JSON record per line for logs, streams and large datasets.
Debug API JSON Responses
Check HTTP status, Content-Type, redirects and raw response bodies.
JavaScript JSON.parse Errors
Debug unexpected token, incomplete JSON and double parsing.
Python JSONDecodeError
Understand line/column errors, Extra data and invalid input.
Go json.Unmarshal Errors
Separate malformed JSON from destination type mismatches.
Formatters, validators & converters
Established JSON utilities for everyday transformation tasks.
JSON Minify Generator
Generate JSON Minify with our generator tool.
JSON Formatter
Formate JSON Formatter with our generator tool.
JSON Validator
Validate Json with our generator tool.
JSON To XML Generator
Generate JSON To XML with our generator tool.
XML To JSON Generator
Generate XML To JSON with our generator tool.
JSON To YAML Generator
Generate JSON To YAML with our generator tool.
JSON To Base64 Generator
Generate JSON To Base64 with our generator tool.
Base64 To JSON Generator
Generate Base64 To JSON with our generator tool.
JSON To Text Generator
Generate JSON To Text with our generator tool.
JSON To CSV Generator
Generate JSON To CSV with our generator tool.
CSV To JSON Generator
Generate CSV To JSON with our generator tool.
TSV To JSON Generator
Generate TSV To JSON with our generator tool.
JSON To TSV Generator
Generate JSON To TSV with our generator tool.
Choose the right JSON check
Syntax
Does the text parse as strict JSON? Start with the JSON Validator or error checker.
Schema
Does valid JSON match required fields, types and constraints? Use JSON Schema Validator.
Application contract
Does the data satisfy business rules? Schema helps at the boundary, but application-specific validation still matters.