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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.
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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?

learn more about this tool
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 use
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": {} }
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.
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 ]
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.
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" } }
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.
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://onlinejsontools.com/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
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Highlight JSON Syntax
Quickly color-code the syntax of a JSON file.
Prettify JSON
Quickly beautify a JSON data structure.
Minify JSON
Quickly compress a JSON file.
Stringify JSON
Quickly convert JavaScript data to a JSON string.
Unstringify JSON
Quickly convert a JSON string to JavaScript data.
Validate JSON
Quickly check JSON for errors and report them.
Escape JSON
Quickly escape special JSON characters.
Unescape JSON
Quickly unescape an escaped JSON string.
Convert JSON to XML
Quickly convert a JSON data structure to an XML file.
Convert XML to JSON
Quickly convert an XML file to a JSON data structure.
Convert JSON to YAML
Quickly convert a JSON data structure to a YAML markup.
Convert YAML to JSON
Quickly convert a YAML markup to a JSON data structure.
Convert JSON to TSV
Quickly convert a JSON file to a TSV file.
Convert TSV to JSON
Quickly convert TSV data to a JSON file.
Convert JSON to CSV
Quickly convert a JSON file to a CSV file.
Convert CSV to JSON
Quickly convert CSV data to JSON data.
Convert JSON to BSON
Quickly convert a JSON structure to binary JSON encoding.
Convert JSON to an Image
Quickly convert JSON to a PNG, GIF, JPG, or BMP image.
Convert JSON to Base64
Quickly encode JSON to base64.
Convert Base64 to JSON
Quickly decode base64 to JSON.
URL-encode JSON
Quickly convert JSON to URL-encoding.
URL-decode JSON
Quickly convert URL-escaped JSON back to JSON.
Convert JSON to Plain Text
Quickly convert JSON data to plain text.
Edit and View JSON
Quickly edit a JSON file in a neat JSON editor in your web browser.
Coming soon These json tools are on the way
Display JSON Statistics
Display detailed information about a JSON data structure.
Flatten JSON
Extract all values or keys from a JSON object as a flat list.
Extract JSON Keys
Extract all keys from all key-value JSON pairs.
Extract JSON Values
Extract all values from all key-value JSON pairs.
Find JSON Keys/Values
Find keys and/or values that interest you in a JSON file.
Obfuscate JSON
Obfuscate a JSON data structure.
Censor JSON Data
Remove certain information from a JSON data structure.
Hide JSON Strings
Rewrite JSON strings using escape codes and make it hard to read.
Convert JSON to a Screenshot
Create a screenshot from JSON code.
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 Properties
Convert a JSON file to properties file.
Convert Properties to JSON
Convert properties data to JSON data.
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 JSON to BSON
Convert a JSON data structure to binary BSON data.
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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Online json tools was created by Browserling — world's first cloud-based cross-browser testing service. Our mission at Browserling is to make make browsers do wonders and to make developers' lives easier. That's why we created this collection of online json utilities. Unlike many other tools websites, we made our tools free, without ads, and with a very simple user interface. Our online json tools are actually powered by our programming tools that we created over the last couple of years. Check them out!
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All conversions and calculations are done in your browser using JavaScript. We don't send a single bit about your input data to our servers. There is no server-side processing at all. We use Google Analytics and StatCounter for site usage analytics. Your IP address is saved on our web server, but it's not associated with any personally identifiable information. We don't use cookies and don't store session information in cookies. We use your browser's local storage to save tools' input. It stays on your computer.
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