Format, validate, and minify raw JSON quickly in the browser.
Paste large JSON, validate it, then format or minify without uploading.
JSON Formatter uses JSON text and format or minify mode to parse JSON, report syntax errors and return formatted or minified JSON. In the browser, JSON Formatter uses JSON text and format or minify mode to parse JSON, report syntax errors and return formatted or minified JSON. JSON Formatter then places the formatted json in the result panel.
For JSON Formatter, input is parsed with JavaScript JSON.parse, so it must use strict JSON syntax: double-quoted strings, no comments, no trailing commas, and valid JSON numbers.
JSON Formatter example input: JSON text = {"ok":true} JSON Formatter expected result: The expected formatted result represents the same JSON value with indentation; minify mode removes non-semantic whitespace. To verify JSON Formatter, reproduce its worked example and compare the displayed or downloaded formatted json with the stated expected result. When JSON Formatter returns a file, open the download and inspect every affected page or image.
JSON Formatter rejects empty input and reports the JSON.parse syntax error; the formatter also derives a line and column when the browser error includes a character position.
For JSON Formatter, review types, escaping, nested data, nulls, arrays, delimiters, and round-trip behavior before replacing the source data.
JSON Formatter runs the json formatter operation in the current browser session. JSON Formatter reads and processes the supplied values in the current browser and does not submit them to an application endpoint. Browser extensions, device security and any manual sharing or download from JSON Formatter remain outside the tool’s control.
For JSON Formatter, no explicit text-length, file-size or numeric-range cap is enforced by this operation code. With JSON Formatter, empty input can produce an empty result or a validation message; With JSON Formatter, characters, formats or browser features outside those handled by the operation may change or prevent the result.
After using JSON Formatter, you may also find these tools useful: base64-encoder-decoder, jwt-decoder, sql-formatter.
Continue the workflow
JSON Formatter is part of the Developer Tools section. Use the nearby pages below when the same job needs checking, cleanup, conversion, formatting, or a different output before you finish.
