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JSON Highlighter

World's Simplest JSON Tool

Free online JSON syntax highlighter. Just load your JSON in the input field and its syntax will automatically get color-coded in the output field. In the tool options, you can select, which parts of the JSON to highlight and add line numbering to it as well. Created for developers by developers fromteam Browserling.

᠎᠎᠎          Tool Options

Data Display

Display line numbers
before each line.
Display tabs and newlines.

Cursor Highlighting

Highlight matching brackets
if the cursor is near one.
Highlight currently
selected line.

What Is a JSON Highlighter?

This tool highlights the syntax of JavaScript Object Notation (JSON) files. It uses different colors for different elements of the object, making it easier to navigate, understand, and read the code. Specifically, text data in quotes is displayed in one color; numbers, logical values, such as "true" and "false", and the null element "null" use another color; and structural elements, such as brackets "{ }" and "[ ]", commas ",", and colons ":" use a third color. In addition to syntax highlighting, the tool can also identify JSON syntax errors and determine their exact location in the file. For example, if the program finds an unclosed quote on a text line, it will report the error and indicate the line number and position where the error is located. This way you can quickly find and fix all JSON mistakes. To quickly navigate the file, you can enable line numbers in the options. You can also display invisible characters, such as tabs and newlines. To track the JSON structure and nested objects and arrays, you can use the brackets-matching highlighting option, which highlights the opening and closing brackets when the cursor is near them. You can also enable highlighting of the current line where the cursor is located. This helps you focus on the line you are currently working on. The tool currently uses a dark theme, but will soon support more color syntax themes. Json-abulous!


JSON Highlighter Examples

Click to try!

Highlight JSON Structure

In this example, we showcase a simple JSON structure containing various data types. The program highlights strings, numbers, boolean values, arrays, and objects in different colors, making it easy to navigate through the file.

{ "string": "value", "number": 0.30004, "boolean": false, "array": [], "object": {} }
Required options
These options will be used automatically if you select this example.
Display line numbers
before each line.
Display tabs and newlines.
Highlight matching brackets
if the cursor is near one.
Highlight currently
selected line.

JSON Structure With an Error

This example demonstrates a JSON structure with an error. The program quickly identifies the error and prints its exact location. To easily find and fix it in the file, we activate the "Show Line Numbers" checkbox in the options. This allows us to quickly jump to the line containing the error.

[ 1, 2, '3, 4 ]
Required options
These options will be used automatically if you select this example.
Display line numbers
before each line.
Display tabs and newlines.
Highlight matching brackets
if the cursor is near one.
Highlight currently
selected line.

JSON With Varying Indentation

In this example, we load a more complex data structure with nested objects and arrays. In addition to syntax highlighting, we visualize invisible tabs, spaces, and line breaks. This helps us notice that the file sometimes uses spaces for indentation and sometimes tabs. It also contains unnecessary spaces at the end of lines, which is a bad programming style. While such JSON formatting is allowed, it is recommended to use a uniform format with no trailing spaces. Fortunately, this JSON format can be easily fixed in our "Prettify JSON" tool.

{ "name": "John Doe", "age": 30, "active": true, "hobbies": [ "reading", "hiking" ], "address": { "city": "New York" } }
Required options
These options will be used automatically if you select this example.
Display line numbers
before each line.
Display tabs and newlines.
Highlight matching brackets
if the cursor is near one.
Highlight currently
selected line.

Pro tips Master online json tools

You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/json/highlight-json?input=%7B%0A%20%20%20%20%22string%22%3A%20%20%22value%22%2C%0A%20%20%20%20%22number%22%3A%20%200.30004%2C%0A%20%20%20%20%22boolean%22%3A%20false%2C%0A%20%20%20%20%22array%22%3A%20%20%20%5B%5D%2C%0A%20%20%20%20%22object%22%3A%20%20%7B%7D%0A%7D&show-lines=true&show-invisible=true&match-brackets=true&highlight-line=true

All JSON Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly color-code the syntax of a JSON file.
Quickly beautify a JSON data structure.
Quickly compress a JSON file.
Quickly convert JavaScript data to a JSON string.
Quickly convert a JSON string to JavaScript data.
Quickly check JSON for errors and report them.
Quickly escape special JSON characters.
Quickly unescape an escaped JSON string.
Quickly convert a JSON data structure to an XML file.
Quickly convert an XML file to a JSON data structure.
Quickly convert a JSON data structure to a YAML markup.
Quickly convert a YAML markup to a JSON data structure.
Quickly convert a JSON file to a TSV file.
Quickly convert TSV data to a JSON file.
Quickly convert a JSON file to a CSV file.
Quickly convert CSV data to JSON data.
Quickly convert a JSON structure to binary JSON encoding.
Quickly convert JSON to a PNG, GIF, JPG, or BMP image.
Quickly create a screenshot from JSON code.
Quickly encode JSON to base64.
Quickly decode base64 to JSON.
Quickly convert JSON to URL-encoding.
Quickly convert URL-escaped JSON back to JSON.
Quickly convert JSON data to plain text.
Quickly edit a JSON file in a neat JSON editor in your web browser.
Quickly extract keys from objects in JSON data.
Quickly extract values from objects in JSON data.
Quickly reduce the nesting level of an array of arrays.
Quickly create a single-level JSON object from nested JSON objects.
Quickly rewrite JSON strings, keys, and values using escape codes.
Quickly obfuscate a JSON data structure.
Quickly remove certain information from a JSON data structure.
Quickly display detailed information about a JSON data structure.
Quickly convert a JSON file to properties file.
Quickly convert a properties file to a JSON file.

Coming Soon

These JSON tools are on the way!
Find JSON Keys/Values

Find keys and/or values that interest you in a JSON file.

Convert JSON to a List

Create a text list from a JSON array or object.

Convert a List to JSON

Create a JSON array from a text list.

Convert JSON to Form Data

Generate HTTP form data from a JSON object.

Convert Form Data to JSON

Generate JSON object from HTTP form data.

Convert JSON to HTML

Create a HTML table from keys and values of a JSON object.

Convert JSON to CSON

Convert a JSON file to a CSON file.

Convert CSON to JSON

Convert a CSON file to a JSON file.

Convert JSON to TOML

Convert a JSON config to a TOML config.

Convert TOML to JSON

Convert a TOML file to a JSON file.

Convert JSON to Bencode

Convert a JSON data structure to Bencode encoding.

Convert Bencode to JSON

Convert Bencode data to JSON data.

Convert JSON to JSONL

Convert a JSON file to a JSONL file.

Convert JSONL to JSON

Convert a JSONL file to a JSON file.

Convert BSON to JSON

Convert binary JSON data structure (BSON) to JSON.

Convert JSON to UBJSON

Convert a JSON file to a universal binary JSON (UBJSON).

Convert UBJSON to JSON

Convert universal binary JSON (UBJSON) to regular JSON.

Convert JSON to Message Pack

Serialize JSON data to binary MessagePack format.

Convert Message Pack to JSON

Unserialize binary MessagePack to a JSON struct.

Convert JSON to Protobuf

Serialize JSON data to binary Protobuf format.

Convert Protobuf to JSON

Unserialize binary Protobuf to a JSON struct.

Convert JSON to a LaTeX Table

Generate a LaTeX table from a JSON object.

Convert JSON to INI

Convert a JSON data file to an INI configuration file.

Convert INI to JSON

Convert an INI configuration file to JSON data file.

Truncate JSON

Loop over JSON structure and truncate all values or keys.

Find JSON Depth

Find the nesting depth of a JSON data structure.

Convert JSON to a Data URI

Convert a JSON data structure to a data URL.

Convert JSON to a PHP Array

Create a PHP data structure from a JSON data structure.

Convert a PHP array to JSON

Create a JSON data structure from a PHP data structure.

Compare Two JSON Files

Diff JSON files and show differences visually.

Sort JSON Object Keys

Lexicographically sort the order of JSON object keys.

Swap JSON Keys with Values

Exchange keys with values in a JSON file.

Create a Random JSON Array

Create a JSON array with random values.

Create a Random JSON Object

Create a JSON object with random keys and values.

Randomize a JSON Array

Randomly change the positions of array elements.

Randomize a JSON Object

Randomly change the order of key, value pairs.

Add Spacing to JSON

Add random spaces and newlines in a JSON file.

Tokenize JSON

Tokenize a JSON data structure.

Remove JSON Syntax

Remove all JSON syntax and leave just the values.

Change JSON Syntax

Change curly braces, commas, and quotes to other symbols.

Fix Quotes in JSON

Fix incorrectly quoted (usually single quote) keys and values.

Use Single Quotes in JSON

Make all keys and values in a JSON to be single-quoted.

Use Double Quotes in JSON

Make all keys and values in a JSON to be double-quoted.

Generate FakeSON

Create JSON that looks real but is fake (FakeSON).

Run jq

Execute a jq query on a JSON data structure.

Filter JSON

Filter keys and values that match a pattern.

Split a String into a JSON Array

Create a JSON array from a string.

Group a JSON Array

Create groups of JSON array items.

Merge JSON Arrays

Merge two or more JSON arrays together.

Compare JSON Arrays

Find differences in two or more JSON arrays.

Merge JSON Objects

Merge two or more JSON objects together.

Damage JSON

Introduce errors in a JSON data structure.

Fix JSON

Try to fix a damaged JSON to the best of our ability.

Create JSON Art

Convert images to valid JSON strings that look like ASCII art.

Visualize a JSON Structure

Create an abstract visualization of JSON's complexity.


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