JSON Formatter & Validator
Paste JSON to format, minify, or validate it. Parsing runs in your browser and nothing is sent to NEXNARA.
Privacy-friendly Your data is processed locally in your browser and is not uploaded to our servers.
What is a JSON Formatter?
A JSON formatter checks whether text is valid JSON, then can print it with indentation or as a compact one-line string. This tool uses JSON.parse and JSON.stringify in your browser. It does not use eval.
How to use it
Paste JSON into the box. Format JSON pretty-prints with 2-space indentation. Minify JSON removes extra whitespace without changing the data. Validate JSON reports whether the text is valid and, when the browser provides it, an error position.
Format and minify
Formatting does not change keys, values, or object order beyond what JSON.stringify already does. Minify keeps the same JSON structure and only removes unnecessary whitespace and line breaks.
Common uses
Use this page to read API responses, tidy config files, or catch a missing comma before you paste JSON into another program.
Privacy
Your JSON stays in the browser. It is not uploaded to NEXNARA servers and is not saved in cookies, local storage, or a database.
FAQ
What makes JSON invalid?
Typical issues include trailing commas, single quotes, comments, or unquoted keys. JSON.parse reports those as Invalid JSON.
Does formatting change my JSON?
No. Format and minify keep the same data. They only change whitespace. Object key order follows JSON.stringify.
Is my JSON uploaded?
No. Processing happens locally in your browser and is not uploaded to our servers.
Can I format Unicode JSON?
Yes. Unicode characters in strings are valid JSON and stay intact after format or minify.
Does this tool execute JSON as code?
No. It only parses JSON with JSON.parse. It never uses eval.