JSON Formatter
Format and minify JSON data. Syntax highlighting and one-click access to the JSON Validator for error detection.
How to use
- 1 Paste your JSON string into the input area.
- 2 Use the Format tab to pretty-print with proper indentation. Great for reading API responses.
- 3 Use the Minify tab to compress JSON by removing all whitespace. Ideal for payloads.
- 4 Need to validate? Click "Validate JSON →" to check for syntax errors and invisible characters.
- 5 Click Copy to grab the result.
Key features
- Two modes: Format (pretty-print) and Minify (compress)
- Syntax highlighting in the input area for better readability
- One-click link to JSON Validator for syntax checking and invisible character detection
- Instant results with no button press needed, updates as you type
What is a JSON Formatter?
A JSON Formatter (also called a JSON Beautifier or JSON Pretty Printer) takes raw, compact JSON and outputs it with proper indentation and line breaks, making it easy to read and debug. It is one of the most essential tools for anyone working with APIs, databases, or configuration files.
JSON (JavaScript Object Notation) is the universal data interchange format for modern software. APIs return it, databases store it, and configuration files are written in it, but the raw output is often minified into a single unreadable line. This tool solves that instantly.
Common Use Cases
Debugging API responses
Paste the raw JSON body from a REST or GraphQL API call and instantly make sense of nested objects.
Reading configuration files
Format minified package.json, tsconfig.json, or any other JSON config to quickly find what you need.
Validating before deploying
Catch missing commas or unescaped characters in JSON configs before they break your CI/CD pipeline.
Minifying for production
Reduce the size of static JSON payloads or data files before bundling them into your app.
Inspecting database records
Format JSON columns stored in PostgreSQL, MySQL, or MongoDB to read nested data at a glance.
Working with LLM outputs
Format the JSON returned by OpenAI, Anthropic, or other AI APIs to inspect structured outputs and tool calls.
Format vs Minify
| Mode | What it does | When to use |
|---|---|---|
| Format | Adds indentation and line breaks for readability | Debugging API responses, reading configs |
| Minify | Strips all whitespace to reduce payload size | Production APIs, reducing network transfer |
Need to check if your JSON is valid? Use the dedicated JSON Validator for syntax checking and invisible character detection.