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Format, beautify, and minify JSON data with syntax highlighting — instantly.
Use JSON Formatter when a compact or messy JSON payload needs readable indentation for debugging, documentation, or review. It is especially helpful for nested API responses where arrays and objects are hard to scan on one line. The input must be valid JSON before formatting can preserve the same data with cleaner whitespace.
Validate the syntax first and remove comments, trailing commas, or single quoted strings.
Pretty printing adds line breaks and indentation; use minified JSON when compact size matters.
Collapse unrelated sections in your editor or format smaller slices of the payload.
Recheck the source text for smart quotes or hidden characters introduced outside the formatter.
JSON Formatter runs locally in the browser and formats the text in memory, so your pasted payload is not intentionally uploaded to a formatting server. Remove tokens and personal data before using examples on shared devices or during screen shares.
Start with the raw API response, config object, or fixture that needs clearer indentation.
Apply pretty printing so braces, brackets, nested arrays, and object properties line up consistently.
Check the fields that matter, such as ids, timestamps, null values, or arrays of child records.
Use the readable version in docs, debugging notes, reviews, or a local editor.
Input: {"id":1,"user":{"name":"Ada"}}. Output expands user onto indented lines so the nested name field is easy to see.
Input: [{"id":1},{"id":2}]. Output places each object on its own indented block for easier review.
It parses valid JSON and rewrites it with consistent indentation so nested objects and arrays are easier to read. It does not decide whether your API schema is correct.
Yes. Paste compact JSON from an API response and format it to expand nested structures across multiple lines with readable indentation.
Formatting should preserve keys and values while changing whitespace. Still compare important IDs, booleans, nulls, and nested arrays if the JSON will be used in production.
The input must be valid JSON first. Remove comments, trailing commas, single quoted strings, or unquoted keys before formatting.
Pretty formatting is best for review and debugging. Minified JSON is better when you need a compact payload for transport or storage.
JSON (JavaScript Object Notation) can be represented in compact (minified) or expanded (beautified) form without changing the data. Minified JSON removes all optional whitespace and is used in production for faster API responses and smaller payloads. Beautified JSON adds indentation and line breaks for human readability during development and debugging. Professional JSON formatting follows consistent rules: 2 or 4 space indentation, one key-value pair per line, and aligned closing brackets. Our formatter handles both directions — paste minified production JSON to read it, or beautify messy JSON for code review.
This tool is particularly useful when: