About JSON Beautifier
This JSON beautifier adds line breaks and indentation so that the structure of your JSON is easy to read. Choose 2 spaces, 4 spaces or a tab for each level. It is free, needs no sign-up and runs in your browser, so nothing you enter is uploaded.
Paste a single long line, such as an API response or a log entry, and each key, array item and nested level goes on its own line. The data does not change. Only the whitespace does.
Pick the indent to match your project. Two spaces is the common default for web code, four spaces is typical in Python and Java projects, and a tab suits editors that let each person choose the width. Copy the result, or press Download to save it as data.json.
The input is checked first. If the JSON is invalid you see the line and column of the first error instead of a half-formatted result, and an Auto-fix button for the usual mistakes. A beautified file is also the best form for comparing two versions in a diff tool.
How to use JSON Beautifier
- Paste your JSON into the box. The tool checks it as you type and shows Valid JSON or the error.
- Choose a tab: Format to pretty-print, Minify to remove whitespace, Validate to check only, Sort keys to order the keys, Tree to browse, Escape to make or read a JSON string, or To CSV for a table.
- For Format and Sort keys, choose the indent: 2 spaces, 4 spaces or Tab.
- If you see Invalid JSON at line and column, go to that position. For a common mistake, press Auto-fix and check the result.
- In Tree, open and close branches, and click a key to copy its JSON path, such as $.users[0].name.
- Use Copy to take the output, or Download to save it as a .json file (a .csv file for To CSV).
Features
- Pretty-print with 2 spaces, 4 spaces or tabs.
- Minify to a single line with no extra whitespace.
- Validation that reports the line, the column and a plain-English message for the first error.
- Auto-fix for single quotes, unquoted keys, trailing commas and comments. The button only appears when the repaired text is valid.
- Tree view with collapsible branches, item counts and one-click copy of the JSON path of any key.
- Sort keys alphabetically at every level, without changing array order.
- Escape and unescape a JSON string. Unescape reads Unicode escapes, including emoji pairs.
- JSON to CSV for an array of objects, with the union of all keys as the header.
- Copy and Download of the result.
- All processing happens in your browser tab, with no server round trip.
Worked examples
{"user":{"id":7,"name":"Ada Lovelace","roles":["admin","dev"],"active":true,"manager":null}} gives { "user": { "id": 7, "name": "Ada Lovelace", "roles": [ "admin", "dev" ], "active": true, "manager": null } }
Indent: 2 spaces.
Privacy: how it works
- Your JSON is processed by code in your browser tab. Nothing is sent to Ulkaa or to any other server, which you can confirm in the Network tab of your browser developer tools.
- API responses, config files and database exports often contain tokens, emails and personal data, so a formatter that does not upload them is the safe kind to paste into.
Tips
- Fix the first error only, then look again. Later errors often vanish, because one missing quote can make everything after it look wrong.
- Sort the keys of two JSON files with the same settings before you compare them. A text diff then shows only the real differences.
- Use the Tree view to find a path, then copy it. That is quicker than counting brackets in a long response.
- To put text with quotes and line breaks into a JSON field, paste it in Escape and copy the result between the quotation marks.
Frequently asked questions
Is it really free?
Yes. There is no price, no trial and no credit card. Ulkaa Tool does the work with your own device, so there is no server bill to pass on to you.
Do I need an account?
No. There is no sign-up and no login. Open the page and use it. An Ulkaa account is not needed for anything on this tool.
Does it run in my browser?
Yes. Your JSON are processed by code running in your browser tab, on your own device.
Is my data uploaded?
No. Your JSON are never sent to Ulkaa or to anyone else. You can check this yourself by watching the Network tab in your browser developer tools while you use the tool.
How do I format JSON?
Paste your JSON in and choose Format. The tool re-indents it so each key and nested level is on its own line. Pick the indent from the list.
Which indent should I use?
Use whatever your project uses. Two spaces is the common default in JavaScript projects, four spaces is common elsewhere, and a tab lets each reader choose the width in their editor.
Does beautifying change the order of keys?
No. Keys stay in the order of the source. To order them alphabetically, use the Sort keys tab.
More JSON Formatter and Validator pages
- JSON Formatter and ValidatorFormat, minify and validate JSON, find errors by line and column, browse it as a tree, and fix common mistakes in one click.
- JSON ValidatorCheck that your JSON is valid and find the first error by line and column.
- JSON MinifierRemove the extra whitespace from JSON to make it smaller.
- JSON ViewerExplore JSON as a collapsible tree and copy the path of any value.
- JSON LintLint your JSON, find the error, and fix the usual mistakes.
- JSON Escape and UnescapeEscape quotes, backslashes and line breaks for JSON, or turn an escaped string back into plain text.
- JSON Key SorterSort the keys of every object in your JSON alphabetically.
- JSON to CSV ConverterTurn a JSON array of objects into a CSV table you can open in a spreadsheet.