JSON Validator & Formatter — developer utilities, encoders and data format tools
The JSON Validator and Formatter checks whether your JSON follows valid syntax and helps you fix it when it does not. Once the input parses, you can format it as a readable tree or minify it into a single line with your choice of indentation. Invalid input shows the exact parse error.
Category: Developer Tools
About this tool
What Is JSON Validator & Formatter? JSON Validator & Formatter is a browser-based tool for Validate JSON and format it into a readable tree. This guide explains the result, the calculation or processing method, and correct usage. Calculation or Processing Method Paste JSON, validate it, inspect the error location if parsing fails, then format the valid object for readability. Formula or method: Valid JSON must follow JSON grammar: quoted keys, valid values, commas, brackets, and no trailing comments. How to Use It Open the tool and choose the required unit, mode, or options. Enter values or paste text into the input fields. Review the result, copy it, or continue with a related tool. Important Notes Use consistent units and verify values before calculating. Incomplete or invalid input can produce an incomplete result. Related Tools Tools that support the same workflow: JSON Formatter — Format, validate, and minify JSON with syntax highlighting. Base64 Encoder/Decoder — Encode and decode text or files in Base64. Hash Generator — Generate MD5, SHA-1, SHA-256 hashes for text. Frequently Asked Questions How does JSON Validator & Formatter work? Paste JSON, validate it, inspect the error location if parsing fails, then format the valid object for readability. What formula does JSON Validator & Formatter use? Valid JSON must follow JSON grammar: quoted keys, valid val