Your data never leaves your browser. All processing happens locally on your device using JavaScript. We do not store or transmit your JSON data to any server.
Built with modern web technologies, JSON Helper handles large files with ease. No server round-trips means instant feedback and formatting.
Install as a PWA (Progressive Web App) and use it without an internet connection. Perfect for coding on the go or in secure environments.
JSON Helper is a powerful, free online tool designed to help developers format, validate, and convert JSON data. Simply paste your JSON into the editor, and apply the selected tool to format the code for readability, or convert it to other popular formats like YAML, TOML, XML, TOON and CSV.
For better efficiency and readability, the tool automatically processes your data during certain operations:
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate.
{
"message": "Hello World",
"escaped": "This has \"quotes\"",
"count": 42,
"items": ["apple", "banana"]
}
YAML is a human-friendly data serialization standard for all programming languages, commonly used for configuration files. It is a superset of JSON, meaning any valid JSON is also valid YAML, but it adds features like comments and a cleaner syntax without braces.
message: Hello World escaped: 'This has "quotes"' count: 42 items: - apple - banana
A configuration file format intended to be easy to read and write due to obvious semantics. Designed to be simpler and less ambiguous than YAML, it is a preferred choice in ecosystems like Rust.
message = "Hello World" escaped = "This has \"quotes\"" count = 42 items = ["apple", "banana"]
XML is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
<root>
<message>Hello World</message>
<escaped>This has "quotes"</escaped>
<count>42</count>
<items>
<item>apple</item>
<item>banana</item>
</items>
</root>
A more readable format that uses indentation and removes unnecessary punctuation, making it cleaner than JSON.
message: "Hello World" escaped: "This has \"quotes\"" count: 42 items: "apple" "banana"
A simple file format used to store tabular data, like spreadsheets or databases.
message,escaped,count,items Hello World,"This has ""quotes""",42,"apple,banana"
No, all processing happens locally in your browser. Your data is never sent to our servers.
JSON (JavaScript Object Notation) is a lightweight format for storing and transporting data. It is easy for humans to read and write, and easy for machines to parse and generate. Think of it as a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages.
JSON is often preferred over XML because it is lighter, faster to parse, and easier to read. Unlike XML, JSON doesn't use end tags, which makes it shorter. It also supports arrays natively, which XML does not.
You can open JSON files with any text editor like Notepad, TextEdit, VS Code, or Sublime Text. However, for better readability and validation, it's best to use a dedicated JSON formatter like this tool.
No, JSON is not a programming language. It is a data interchange format used to store and transfer data. It contains data only, no executable code.
JSON is primarily used to transmit data between a server and a web application. It serves as a common format for APIs and configuration files due to its simplicity and compatibility with many programming languages.
JSON is a data format for representing structured data, often used in NoSQL databases (like MongoDB) or for API responses. SQL (Structured Query Language) is a programming language used to manage and query data in relational databases (like MySQL or PostgreSQL). While SQL is for querying, JSON is for data representation.
Base64 is a way to represent binary data (like images or files) as an ASCII string. It's commonly used to transmit data over text-only media. Our tool allows you to easily encode and decode Base64 strings.
Encoded JSON:
eyJtZXNzYWdlIjoiSGVsbG8gV29ybGQiLCJlc2NhcGVkIjoiVGhpcyBoYXMgXCJxdW90ZXNcIiIsImNvdW50Ijo0MiwiaXRlbXMiOlsiYXBwbGUiLCJiYW5hbmEiXX0=
Encoding (like Base64) is reversible; you can decode it back to the original data. Hashing (like MD5 or SHA-256) is a one-way process; you cannot convert the hash back to the original data. Hashing is used for verifying data integrity.
Input: "Hello World"
MD5:
b10a8db164e0754105b7a99be72e3fe5
SHA-256:
a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e
CRC32:
4a17b156
GZIP is a file format and application used for file compression and decompression. It reduces the size of data, making it faster to transmit over the network. Our tool allows you to compress (encode) and decompress (decode) text using GZIP.
JS Encoding escapes characters so they can be safely included in a JavaScript string (e.g., escaping quotes). URL Encoding converts characters for safe transmission over the Internet (e.g., converting spaces to %20). Use JS Encoding for code and URL Encoding for web addresses.
JS Encoded (quotes escaped):
var str = "This has \"quotes\"";
URL Encoded (spaces to %20):
https://example.com/search?q=hello%20world
JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. Our tool allows you to decode JWTs to view their header and payload claims.
Encoded Token:
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c
JSONPath is a query language for JSON, similar to XPath for XML. It allows you to extract specific data from a JSON structure. Our tool supports JSONPath queries to help you filter and find exactly what you need within your JSON data.
Query for "items" array:
$.items[*]
Result:
["apple", "banana"]