How do I format JSON online?

Paste your JSON (or upload a .json file) into the editor, choose indentation (2 spaces, 4 spaces, or Tab), then click Format or press Ctrl+Enter. Our free JSON formatter beautifies the data instantly in your browser.

What is the difference between JSON format and JSON formatter?

JSON format refers to the JSON data structure itself. A JSON formatter (beautifier) takes unreadable or minified JSON and rewrites it with clear indentation and line breaks so you can read and debug it easily.

JSON (JavaScript Object Notation) is a lightweight data-interchange format used by APIs and apps. It is easy for humans to read when formatted, and easy for machines to parse and generate.

How do I validate JSON?

Paste JSON and click Validate. The tool uses the browser's native JSON parser and highlights syntax errors with approximate line and column so you can fix invalid JSON quickly.

How do I beautify or pretty-print JSON?

Use Format to pretty-print JSON with your preferred indentation. You can also enable auto-format while typing for continuous JSON formatting.

How do I minify JSON?

Click Minify to remove unnecessary whitespace. Minified JSON is smaller for APIs, storage, and network transfer while keeping the same data.

Is my JSON data uploaded or stored?

No. JSON formatting and validation run locally in your browser. Your JSON is not uploaded to our server for these tools.

Can I format large JSON files?

Yes. Parsing and formatting run in a Web Worker so the UI stays responsive for larger files. Tree view uses virtualized rendering for big objects and arrays.

Which JSON format tools are included?

This site includes a JSON formatter, JSON validator, JSON minifier, JSON viewer (tree view), plus related developer tools like Base64 and JWT decoder.

JSON Format Online — Formatter, Beautifier & Validator

Beautify, validate, and minify JSON in your browser — free & private.

Your JSON is processed locally in your browser and is never uploaded to our server.

IndentAuto-format while typing

Input

103 chars · 6 linesReadyCtrl+Enter to format

Output

103 chars

Free Online JSON Format Tool

Need to format JSON quickly? This free JSON formatter (also called a JSON beautifier) turns compact or messy JSON into clean, readable structure with proper indentation. Use it to format JSON online, validate syntax, minify payloads, and explore data in a tree view — all processed locally in your browser.

How to Format JSON Online (Step by Step)

Paste JSON into the input editor, or drag & drop / upload a .json file.
Choose indentation: 2 spaces, 4 spaces, or Tab.
Click Format (or press Ctrl+Enter) to beautify / pretty-print JSON instantly.
Use Validate if you only need to check whether the JSON format is valid.
Switch to Tree view, search keys/values, then Copy or Download the result.

Why Use This JSON Formatter?

Fast JSON format for API responses, config files, and logs
Clear error messages with line/column when JSON is invalid
Built-in JSON validator, JSON minifier, and JSON viewer
Upload, drag-and-drop, copy, and download support
Privacy-first: JSON is formatted in your browser and never uploaded for processing
Works on desktop and mobile — no install required

Common JSON Format Use Cases

Pretty-print API JSON before debugging in Postman or code
Beautify minified frontend/backend config JSON
Validate JSON before sending it to an API or saving a file
Minify JSON to reduce payload size for production
Browse nested JSON objects and arrays in tree view

Is this JSON format tool free?

Yes. Format, validate, beautify, and minify JSON online for free — no signup and no install.

Is my JSON data safe?

Yes. JSON formatting runs locally in your browser. We do not upload your JSON to our servers for the public tools.

JSON Format FAQ

How do I format JSON online?: Paste your JSON (or upload a .json file) into the editor, choose indentation (2 spaces, 4 spaces, or Tab), then click Format or press Ctrl+Enter. Our free JSON formatter beautifies the data instantly in your browser.
What is the difference between JSON format and JSON formatter?: JSON format refers to the JSON data structure itself. A JSON formatter (beautifier) takes unreadable or minified JSON and rewrites it with clear indentation and line breaks so you can read and debug it easily.
What is JSON?: JSON (JavaScript Object Notation) is a lightweight data-interchange format used by APIs and apps. It is easy for humans to read when formatted, and easy for machines to parse and generate.
How do I validate JSON?: Paste JSON and click Validate. The tool uses the browser's native JSON parser and highlights syntax errors with approximate line and column so you can fix invalid JSON quickly.
How do I beautify or pretty-print JSON?: Use Format to pretty-print JSON with your preferred indentation. You can also enable auto-format while typing for continuous JSON formatting.
How do I minify JSON?: Click Minify to remove unnecessary whitespace. Minified JSON is smaller for APIs, storage, and network transfer while keeping the same data.
Is this JSON formatter free?: Yes. You can format, validate, beautify, and minify JSON online for free — no account required.
Is my JSON data uploaded or stored?: No. JSON formatting and validation run locally in your browser. Your JSON is not uploaded to our server for these tools.
Can I format large JSON files?: Yes. Parsing and formatting run in a Web Worker so the UI stays responsive for larger files. Tree view uses virtualized rendering for big objects and arrays.
Which JSON format tools are included?: This site includes a JSON formatter, JSON validator, JSON minifier, JSON viewer (tree view), plus related developer tools like Base64 and JWT decoder.