Formatting (pretty-print) takes a valid JSON value and writes it back with indentation and line breaks. The data does not change. Object keys, string contents, numbers, booleans, and null stay as the parser read them. Only insignificant whitespace is added so nested objects and arrays are visible.
This JSON formatter runs in your browser. It does not pretty-print invalid text. If JSON.parse fails, the box is left as you typed it and the status names the first problem. That is deliberate. A formatter that rewrites on failure hides the source you are trying to fix.
Use this page when you cannot see structure: a single-line API response, a minified config, or a log field that is legal JSON but unreadable. If you only need a yes-or-no check, use the JSON Validator instead. This page will still report an error on bad input, but its job is indentation after a successful parse.
Empty or whitespace-only input is not JSON. The tool asks you to paste a value first. Arrays, objects, strings, numbers, true, false, and null are all valid JSON values and will format if the parse succeeds.
A typical API body arrives as one line:
{"name":"Ada","roles":["admin","developer"],"ok":true}Format writes the same value with structure:
{
"name": "Ada",
"roles": [
"admin",
"developer"
],
"ok": true
}Minify on this page returns a compact string again. Key order follows what the browser’s parser produced. Do not treat exotic key order in the original text as something formatting will preserve.
These are different questions. Format asks for readable whitespace. Validate asks whether the string is JSON at all. Minify asks for the smallest valid text. Mixing them on one title makes the search result vague and the page harder to scan.
Validate first when you do not know if the string is legal. Comments, single quotes, and trailing commas are not JSON. The JSON Validator leaves your text alone and reports valid or invalid. Format after the value parses. Minify only when you need a smaller body or a one-line log field, and only after the payload is valid.
// or /* */)The status message is the start of the search, not always the only defect. Fix the first token, then format again. If you still cannot see the break, the same parse error will appear until the string is legal JSON.
Indentation is not a path list or a diff. Use how to work with nested JSON or how to compare two JSON documents when those are the jobs.
Parse, format, and minify run in this browser with the same JSON.parse / JSON.stringify the page already has. The payload is not sent to YallaSolve’s server for this tool. That matters for customer data, tokens, and internal configs. If you paste secrets, they still sit in this tab’s memory until you close or clear the page.
No. After a successful parse it only changes insignificant whitespace. Keys, strings, and numbers stay as parsed.
The box is not rewritten. The status shows the browser parse error so you can fix the first token.
No. An empty box is not a JSON value. Paste an object, array, or other JSON value first.
If you only need a yes-or-no answer, validate. If the string is valid and you cannot read it, format. Do not use format as a substitute for validate when the error is unclear.
No. Format and minify both run in the browser. Nothing is posted to the server for this tool.
The browser keeps enumerable string-key order from the parsed object. Do not rely on exotic ordering from the original text.
