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JSON Validator

World's simplest json tool
Free online JSON validator and linter. Just load your JSON in the input field and it will automatically get validated. It can't get any easier than this! Created for developers by developers from team Browserling.
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What is a JSON Validator?

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This tool validates the given JSON (JavaScript Object Notation) object, checks if there are syntax errors in it and if there are, it reports them in the output area. Validating a JSON is also often called linting. As JSON files are often created manually, it often leads to accidental errors such as missing commas, mismatched quotes, or incorrect data types. This tool can detect such errors and precisely indicate their locations. When the program detects an error, it displays a red notification on the screen. If the JSON file is correct and there are no syntax errors, the program displays a green notification on the screen, confirming the given JSON is valid. Json-abulous!

JSON Validator examples

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Valid JSON
In this example, we load a simple JSON file to check its validity. Since the file has correct JSON syntax and structure, the program determines it's a valid JSON and displays a green badge in the output area.
{ "fruits": ["apple", "banana"] }
In this example, we load a simple JSON file to check its validity. Since the file has correct JSON syntax and structure, the program determines it's a valid JSON and displays a green badge in the output area.
Incorrect JSON Quotes
In this example, we run our linter on a JSON data structure containing an error, resulting in a red error badge. The error is located on the second line and involves the use of single quotes instead of double quotes.
{ "fruits": ['apple', 'banana'] }
SyntaxError: JSON.parse: unexpected character at line 2 column 14 of the JSON data
Missing Closing Bracket
In this example, we use our JSON validation program to identify another common error. The closing curly brace "}" is missing on line 9, which should close the "wind" object. This skipped curly brace messes up the JSON structure and it's no longer syntactically valid. Fortunately, this error can be easily corrected once it is identified.
{ "city": "New York", "temperature": 18, "conditions": "Partly Cloudy", "wind": { "speed": 10, "direction": "North" }
SyntaxError: JSON.parse: end of data after property value in object at line 9 column 2 of the JSON data
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/validate-json?input=%7B%0A%20%20%22fruits%22%3A%20%5B%22apple%22%2C%20%22banana%22%5D%0A%7D
All json tools
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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.
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Quickly create a single-level JSON object from nested JSON objects.
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Quickly obfuscate a JSON data structure.
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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.