JSON Formatter
Pretty-print JSON.
Private — runs in your browser Instant results
Output
{
"name": "The Daily Tools",
"private": true
}Introduction
Your files and text are processed locally in your browser and are never uploaded.
What is JSON Formatter?
Use JSON Formatter to inspect API responses, configuration files, and logs. It formats valid JSON; it does not repair JavaScript object literals or guess missing syntax.
Definition: JSON Formatter converts valid compact JSON into readable, indented JSON and can also minify it locally in your browser.
Formula
JSON.parse then JSON.stringify with indentation
How it works
- Paste valid JSON into the input area.
- Format it for readable indentation or minify it to remove whitespace.
- If parsing fails, correct the reported JSON syntax error and try again.
- Copy the generated output; your input stays in your browser.
Worked example
Example: Format compact JSON
Inputs: {"name":"The Daily Tools","tools":107}
- Paste JSON into the input field
- Click format or view auto-formatted output
Indented, readable JSON with proper line breaks.
Use cases
- Working through a json question with clear inputs
- Handling a file or text value that you prefer to keep on your device
- Using a focused tool instead of a general spreadsheet or manual calculation
Advantages
- Browser-based processing — entered values and selected files are not sent to our servers
- No account required
- Instant results with a clean, readable interface
- Transparent formula shown on this page
Limitations
- JSON must use double-quoted strings and property names.
- Comments, trailing commas, and JavaScript object syntax are not valid JSON.
- Very large inputs can be limited by available browser memory.
Documentation
Syntax: Valid JSON: objects {}, arrays [], strings, numbers, booleans, null
Input: {"users":[{"id":1,"name":"Ada"}]}Output: Pretty-printed JSON with 2-space indentation
Common errors
- Trailing commas
- Single quotes instead of double quotes
- Comments are not valid JSON
- Duplicate object keys can be accepted differently by different systems
- Invalid escape characters or unquoted property names
Frequently asked questions
- Does this repair invalid JSON?
- No. It formats or minifies valid JSON and reports parsing failures for invalid input.
- Is JSON formatting deterministic?
- Yes. The output is generated locally according to the selected format; it is not an estimate.
- Is the JSON Formatter free to use?
- Yes. JSON Formatter on The Daily Tools is completely free, requires no account, and runs entirely in your browser.
- Does The Daily Tools store my inputs?
- No. Your numbers and text never leave your device. The Daily Tools has no backend database for calculator inputs.
- Who should use the JSON Formatter?
- Anyone who needs to complete a json task locally in a browser.
- How accurate is the JSON Formatter?
- The tool follows the selected format or processing method locally in your browser. It is not an estimate.
- Can I use the JSON Formatter on mobile?
- Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.
- Is my data sent to a server?
- No. Developer tools process text locally in your browser. Do not paste secrets into any website unless you understand its privacy model.
Sources & references
Key points
- JSON Formatter is a free, browser-based developer utility for pretty-print JSON.
- Formula: JSON.parse then JSON.stringify with indentation
- Private, browser-only processing
- Private, browser-based processing