JSON file guide

Structured data for applications

What it stores

JSON represents objects, arrays, strings, numbers, booleans and null. Property names use double quotes; comments are not part of standard JSON.

When to choose it

Format JSON for inspection, flatten suitable records into a CSV table, or combine JSONL records into a JSON array.

What to check before converting

JavaScript cannot represent every large integer exactly. CSV has no universal type system, so a JSON-to-CSV round trip can change types or nested structure. Keep the source data.

Available JSON tools

CSV · JSON

Convert CSV to JSON

Parse a CSV header and rows into JSON records, choosing the input encoding and delimiter.

JSON · CSV

Convert JSON to CSV

Export an array of JSON objects as CSV rows, with an option to flatten nested fields.

XML · JSON

Convert XML to JSON

Parse safe XML and represent its elements and values as a JSON structure.

JSON · XML

Convert JSON to XML

Write JSON data into an XML document using a root element name you choose.

JSON · JSON

Format and validate JSON

Validate JSON syntax and add readable indentation without changing the intended data structure.

JSON · JSON

Minify JSON

Remove unnecessary whitespace from valid JSON to create a compact text representation.

JSON · JSONL

Convert JSON to JSONL

Write each item in a JSON array as one JSONL record, optionally selecting a nested array path.

JSONL, NDJSON, TXT · JSON

Convert JSONL to JSON Online

Convert line-delimited JSONL or NDJSON records into one valid JSON array.

TXT, MD, JSON, CSV · Base64 (.txt)

Encode text as Base64

Encode UTF-8 text bytes into a Base64 string for data transport or development.