Office utility

JSON Formatter — format, minify, and validate JSON

Paste JSON on the left, format or minify it, then copy or download the cleaned output. This runs locally in your browser (no uploads).

Indentation

Input JSON

Tip: if your JSON came from logs or an API, validate first to locate errors quickly.

Output

Ready.

Common uses

Clean JSON before analysis, convert to CSV, or share readable payloads in reports.

Validate JSON before converting with JSON to CSV.
Fix broken indentation and remove trailing commas introduced by copy/paste.
Minify payloads before submitting to APIs or storing in a database.

How to Format, Minify, and Validate JSON (Without Uploading Anything)

This is a client‑side JSON formatter. Your JSON stays on your device: you paste data into the editor, the browser formats it, and you can copy or download the cleaned output. If you work with APIs, configuration files, or webhooks, a reliable formatter saves time and prevents subtle mistakes from breaking your code.

Quick workflow

Paste JSON into the input box.

Click Validate to confirm it’s valid JSON and locate the first error.

Click Format/Prettify to make it readable with indentation.

Use Minify when you need compact output for shipping or embedding.

Copy the result or download a clean .json file.

Common JSON errors (and fixes)

Trailing commas: remove commas after the last item.

Single quotes: JSON requires double quotes for keys and strings.

Unescaped quotes/newlines: escape inner quotes and line breaks (e.g., \n, \").

NaN/Infinity: not valid JSON—use a number or null.

Comments: JSON doesn’t allow // or /* */ comments.

Related tools

JSON to CSV — convert API exports into a spreadsheet table.

CSV to JSON — turn a sheet into JSON objects for apps/scripts.

Privacy note: runs in your browser. Avoid pasting secrets on shared devices.