About JSONLints

Practical JSON tools for everyday development

Built for fast, focused data inspection

Why we created JSONLints

JSONLints was created to make the small but frequent tasks around JSON less frustrating: checking syntax, making a payload readable, finding a misplaced comma, comparing two responses, or turning a structure into code.

The project is maintained as an independent developer utility with a simple goal: provide a fast interface that is useful during API development, debugging, documentation work, and incident response.

What the tool does

• Validates JSON syntax and reports the approximate line and column of errors.
• Formats or minifies valid JSON with configurable indentation.
• Repairs common human-created mistakes for inspection and follow-up editing.
• Shows valid data as a tree or table and compares two JSON documents.
• Converts JSON into formats and type definitions used by modern teams.

Privacy by design

Parsing and formatting in the main tool happen in your browser. That makes the editor useful for inspecting sensitive-looking payloads without sending pasted text to a formatting endpoint. Read the full Privacy Policy for details about hosting logs, cookies, advertising, and analytics.

Responsible use

JSONLints is an inspection and transformation aid, not a substitute for application tests, schema validation, access controls, or production data review. Always verify generated output before shipping it.