JSON Beautifier: Format, Minify, and Validate JSON
JSON Beautifier helps you pretty-print, minify, and validate JSON in your browser. Choose spaces or tabs for indentation, sort keys, or use lenient mode to tolerate comments and trailing commas. The native parser checks whether the input is valid and reports the position of syntax errors, so you can locate problems more easily.
JSON Beautifier is a browser-based JSON formatter for developers who need to pretty-print, minify, or validate JSON. Use it to make a compact document easier to read, reduce formatting whitespace, or check whether input parses. The native parser reports the position of syntax errors to help you find where a document needs attention.
The tool offers several formatting choices. Set indentation to spaces or tabs, sort keys for a consistent visible order, or enable lenient mode to tolerate comments and trailing commas. Paste or drop your JSON, choose the operation and options you need, then review the output or any reported parsing issue.
JSON represents structured data using objects, arrays, strings, numbers, booleans, and null. Pretty-printed and minified JSON use the same data format but present it differently: indentation and line breaks make content easier for people to inspect, while minification removes formatting whitespace. Sorting keys changes their displayed order. These options are useful when you are reviewing data, preparing a snippet, or checking JSON before using it elsewhere.
JSON Beautifier runs entirely in your browser. Your input is processed on your device and is not uploaded, stored, or sent to a server. Once the page has loaded, the tool works offline, so you can format and check JSON without an internet connection. It is free to use and can help developers and DevOps engineers prepare, review, and troubleshoot JSON.
Step 1: Paste or drop your JSON into the tool. You can use a complete JSON document or a snippet you want to check.
Step 2: Choose how to format the output. Select spaces or tabs for indentation, and sort keys if you want them arranged consistently.
Step 3: Enable lenient mode if your input contains comments or trailing commas. These are tolerated in lenient mode.
Step 4: Choose whether to pretty-print, minify, or validate the JSON. The tool uses a native parser to check the input.
Step 5: Review and copy the result. If the input has a syntax error, check the reported position to find where parsing failed.
Use case: Make an unreadable, machine-generated JSON file easier to review before committing it. Pretty-printing adds indentation so the structure is clearer.
Use case: Check a JSON document you did not write against the syntax requirements of a project. Validation can help identify a parsing problem before you use the document.
Use case: Produce consistently indented output so a diff is easier to review. Sorting keys can also help keep key order consistent.
Use case: Format a JSON snippet before pasting it into a bug report or code review. Readable indentation makes nested objects and arrays easier to inspect.
Use case: Find the position of a syntax error in JSON that does not parse. The reported position gives you a place to start troubleshooting.
Use case: Minify JSON when you need a more compact representation. Removing formatting whitespace can make the document easier to paste into contexts where space matters.
Use case: Work with JSON that includes comments or trailing commas during editing. Lenient mode tolerates these additions while you use the tool.