Home Tools About Contact

JSON Formatter & Validator

Format messy JSON into readable, indented output. Minify JSON to save space. Validate JSON for errors instantly.

Paste your JSON data above. Live validation shows errors as you type.

Share this tool:

JSON Formatter – Format & Validate JSON Online Free

JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. However, JSON data often arrives minified or poorly formatted, making it difficult to read. Our free JSON Formatter instantly transforms messy JSON into beautifully indented, readable output.

  1. Paste your JSON into the input box. The validator immediately checks for syntax errors as you type.
  2. Choose Format, Minify, or Validate. Format adds proper indentation; Minify compresses it; Validate just checks if it's valid.
  3. Copy the output with one click and use it in your project.
What is JSON formatting?
JSON formatting (also called pretty printing) adds indentation and line breaks to minified JSON, making it human-readable. Raw API responses and JSON files are often minified (all on one line) to save bandwidth. A formatter makes them readable for debugging and development.
What is the difference between Format and Minify?
Format adds spaces, newlines, and indentation to make JSON readable by humans. Minify removes all unnecessary whitespace to produce the smallest possible file — ideal for production APIs where bandwidth matters.
Does this tool store my JSON data?
No. Your JSON data is processed on our server solely to format or validate it, and is never stored, logged, or shared. Each request is independent and your data is immediately discarded after processing.

Related Tools

Word CounterBase64 EncoderURL EncoderMeta Tag Generator

Suggest an Improvement

Have an idea to make this tool better? We'd love to hear it.

Thanks! Received.