Online JSON Tools — Format, Escape, Validate

Free online JSON formatter, JSON string escape, and JSON unescape tools. Beautify, minify, and validate JSON directly in your browser.

JSON (JavaScript Object Notation) is the default format for web APIs. These tools cover the three operations developers perform most often on JSON data.

Formatting / beautifying makes minified API responses human-readable by adding indentation and newlines. Minifying strips all unnecessary whitespace to reduce payload size. JSON string escaping is needed when you embed a raw string inside a JSON value — double quotes and backslashes must be escaped or the outer JSON will fail to parse.

All processing is client-side. Paste your JSON — nothing leaves your browser.

All JSON Tools
JSON Formatter
Beautify or minify JSON. Validates syntax and highlights errors with line numbers.
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JSON String Escape
Escape a string for safe embedding inside a JSON value.
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JSON String Unescape
Unescape JSON string escape sequences back to their literal characters.
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CSV to JSON
Convert CSV files or pasted data to JSON arrays. Auto-detects headers and delimiters.
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JSON to CSV
Convert a JSON array of objects to CSV. Download or copy the result. Handles nested values and custom delimiters.
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YAML to JSON
Convert YAML to JSON or JSON to YAML. Useful for config file migration and API work.
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XML Formatter
Beautify, minify, and validate XML. Reports syntax errors with line numbers.
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TOML to JSON
Convert TOML configuration files to JSON instantly in your browser.
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