daytics™
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How to Use This Tool
JSON (JavaScript Object Notation) is the dominant data-interchange format on the web — used by APIs, configuration files, and browser storage. This formatter parses your JSON, reports syntax errors with line and character position, then either pretty-prints it with your chosen indentation or minifies it to a single line. Everything happens locally; your data never leaves this page.
How to Use
- Paste your JSON into the input box.
- Click Format (Pretty) to indent it, or Minify to strip all whitespace.
- When formatting, pick 2 spaces, 4 spaces, or Tab indentation.
- Check the status line below — green means valid, red shows the exact parse error.
Frequently Asked Questions
What is JSON?
JSON is a lightweight text format for structured data: objects (key/value pairs), arrays, strings, numbers, booleans and null. It was originally a subset of JavaScript but is now language-independent.
When should I pretty-print vs minify?
Pretty-print when a human needs to read the JSON — debugging, docs, committing configuration. Minify when a machine transfers it — smaller payloads over the network, less storage.
Why does my JSON fail validation?
Common causes: single quotes instead of double, trailing commas after the last item, comments (JSON doesn't allow them), unescaped control characters, unquoted keys, or NaN/Infinity. The error message shows the exact position.
Is my data sent to a server?
No. Parsing, formatting and minifying all run in your browser via JavaScript's built-in JSON.parse and JSON.stringify. Nothing is uploaded.