JSON Validator & Linter
JSON Validator & Linter checks your JSON for errors with detailed messages showing exactly where the problem is. Also formats and minifies. All in your browser.
Última atualização: July 2026
A JSON validator checks your JSON for syntax errors and shows detailed messages with line and column numbers so you can fix them fast. It also formats and minifies JSON. Everything runs in your browser; nothing is uploaded.
Como usar JSON Validator & Linter
- Paste your JSON.
- The validator checks automatically and highlights any errors.
- Format or minify with one click, then copy the result.
Perguntas frequentes
What errors does it detect?
All standard JSON syntax errors: trailing commas, missing quotes, invalid values, unmatched brackets, duplicate keys and more.
Does it show line numbers?
Yes — every error message includes the exact line and column number where the problem was found.
Is my JSON uploaded?
No — validation is done locally in your browser.
ferramentas para desenvolvedores relacionadas
JSON Formatter & Validator
Format, beautify, minify and validate JSON instantly. Free, private, in-browser JSON formatter with clear error messages.
JSON to YAML Converter
Convert JSON to YAML and YAML back to JSON instantly. Free, private, in-browser converter with validation.
CSV to JSON
Convert CSV data into a JSON array of objects using the header row as keys. Free, instant, in-browser CSV to JSON converter.
UUID Generator
Generate random v4 UUIDs (GUIDs) in bulk and copy them with one click. Free, instant and fully in-browser using the secure crypto API.