Prettify JSON
Beautify a JSON data structure with your preferred indentation. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Prettify JSON
- 1. Paste your JSON. Drop your raw JSON into the input pane. It can be minified, single-line API output or a whole config file; the formatter parses it the moment it arrives and immediately shows the beautified version on the right.
- 2. Pick an indentation style. Choose two spaces, four spaces or tabs from the Indentation setting. Two spaces matches most JavaScript style guides, four spaces reads better in deeply nested payloads, and tabs let every reader apply their own width.
- 3. Sort keys if you want a stable order. Turn on Sort keys to arrange every object's properties alphabetically at every nesting level. Sorted output makes two versions of the same payload line up in a diff, which is handy before committing fixtures to git.
- 4. Copy the formatted result. Click the copy button on the output pane and paste the pretty-printed JSON into your editor, pull request or documentation. If you keep editing the input, the output reformats live.
When to use Prettify JSON
Prettify JSON is for any moment a machine gave you JSON that a human now has to read. APIs, log pipelines and build tools usually emit JSON minified onto one line to save bytes, which is ideal for transfer and terrible for eyeballs. Re-indenting it restores the structure so you can see which object owns which field.
- Inspecting an API response. You fetched an endpoint with curl or copied a response from the network tab and got a single 3,000-character line. Prettifying it reveals the nesting so you can find the field you actually care about.
- Cleaning up config files. package.json, tsconfig.json or a CI config that different editors have mangled with mixed indentation. One pass through the formatter with your preferred indent makes it consistent again.
- Preparing readable diffs. Before committing a JSON fixture or snapshot, format it with sorted keys. Future changes then show up as small, meaningful diffs instead of a one-line blob that changes entirely every time.
- Sharing examples in docs or tickets. A bug report or API documentation is far easier to follow when the payload is indented. Paste the raw JSON here, copy the formatted version, and drop it into the ticket or markdown file.
Examples
Prettify a compact object
Input
{"name":"Ada","languages":["js","ts"],"active":true}Output
{
"name": "Ada",
"languages": [
"js",
"ts"
],
"active": true
}About the Prettify JSON tool
Prettify JSON does its work locally, right in the browser. Beautify a JSON data structure with your preferred indentation. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the JSON Tools collection on EditSafely, a set of 90 small, focused JSON utilities that share the same instant, private workspace.
You can shape the output with 2 settings, including Indent and Sort keys, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Is Prettify JSON free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.