Raw JSON Input
Waiting for JSON content
Start typing on the left or load one of the sample payloads to inspect it instantly.
PrettyJSON
Instantly clean, validate, and inspect web payloads
Sample Payloads
☕Buy me a coffeeRFC 8259 Compliant & 100% Client-Side
JSON Beautifier Online — Beautify & Indent JSON
Instantly beautify JSON and transform minified payloads into clean, readable, indented output. Customize 2-space or 4-space formatting with zero data upload.
Private & Offline Ready
Every tool runs in your browser, so the JSON you paste never leaves your device.
Works Instantly, Even Offline
Formatting, minifying, repairing, and the tree view all run on your device, so there are no uploads to wait on.
Exact Error Line & Column
Syntax errors like unescaped quotes and trailing commas are flagged with their exact line and column.
How a JSON Beautifier Makes Minified and Escaped JSON Readable
Turning single-line API responses and escaped JSON strings back into clean, indented, readable structure.
1. From One Long Line to Readable Structure
APIs and log systems almost always send JSON as a single compact line to save bandwidth. That is efficient for machines but hard on people: a 2 KB response becomes an unbroken wall of text where you cannot tell where one object ends and the next begins. A JSON beautifier reverses that — it parses the compact string and re-prints it with line breaks and indentation so every key sits on its own line and the nesting is obvious at a glance. Paste a minified response from your browser network tab, a curl command, or a log line, and PrettyJSON beautifies it instantly in your browser.
Minified Input vs Beautified Output
// Minified (one line)
{"user":{"id":42,"name":"Alice","roles":["admin","dev"]}}
// Beautified (2-space indent)
{
"user": {
"id": 42,
"name": "Alice",
"roles": [
"admin",
"dev"
]
}
}Explanation: The beautifier parses the compact string and re-prints it with indentation; the data itself is unchanged.
2. Beautifying Escaped or Stringified JSON
A common headache is JSON that has been stored or logged as a string, so every double quote shows up with a backslash in front of it and the whole thing sits on one line. This happens when a JSON value is embedded inside another JSON field, saved to a database column, or written to a log file. Pasted in that state it is hard to read and often will not parse directly. The fix is to unescape it first — turn the escaped quotes back into real quotes — and then beautify the result so the structure is readable again. If you are pasting something full of backslash-quote sequences, that is the tell-tale sign you are looking at escaped JSON.
Technical Highlights
- Escaped, or stringified, JSON has a backslash before every quote and sits on one line.
- It usually comes from JSON embedded in another field, a database column, or a log.
- Unescape it first, then beautify to restore readable structure.
3. Beautify vs Format vs Minify
These terms overlap, so here is the practical difference. Beautifying and formatting do the same job — both add indentation and line breaks to make JSON readable — and people use the words interchangeably. Minifying is the opposite: it strips whitespace to make the payload as small as possible for sending over the network. A typical workflow uses both: minify JSON when you ship it, and beautify it when you need to read or debug it. PrettyJSON keeps a separate tool for each, so you can jump straight to the one you need.
Technical Highlights
- Beautify and format are the same operation — both make JSON readable.
- Minify is the reverse: it removes whitespace to shrink the payload.
- Beautify to debug, minify to ship.
Frequently Asked Questions
Common questions and expert answers regarding this tool.
What is a JSON Beautifier?
A JSON beautifier takes compact or minified JSON and adds line breaks and indentation so it is easy to read. It is the same operation as formatting. PrettyJSON beautifies in your browser, so nothing you paste is uploaded.
What is the difference between a JSON Beautifier and a JSON Formatter?
In practice, none — both add indentation and line breaks to make JSON readable, and the words are used interchangeably. We keep separate Formatter and Beautifier pages because people search for both, but the underlying tool is the same.
Can I beautify minified or escaped JSON from logs?
Yes. Paste a minified API response or curl output and it beautifies right away. If the JSON is escaped (a backslash before every quote, usually from a log or a database field), unescape it first, then beautify the result.