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Tools / Developer / JSON Formatter

Developer tool

JSON Formatter

Format and prettify JSON instantly with clean indentation.

Step 1

Paste JSON

Insert JSON payload in the editor.

Step 2

Format

Apply readable indentation and structure.

Step 3

Copy output

Use clean JSON in APIs and apps.

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Average speed

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Input

Output

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About JSON Formatter

Minified or programmatically generated JSON is compact for transmission but impossible to read when debugging API responses, configuration files, or data exports. This JSON formatter parses the raw JSON and re-serializes it with consistent 2-space indentation and proper line breaks, making the hierarchy and every key-value pair immediately readable. Any syntax error in the input is caught during parsing and reported, so the tool doubles as a quick validator. It is used by developers inspecting REST API payloads, en...

Runs locally in your browser. The text you enter is not uploaded to CodeStorms.

→ Paste a minified API response to inspect specific nested fields during debugging. → Format a JSON config file before committing it to version control for readability. → Beautify a data export JSON blob for manual audit before re-importing it. → Use parse error output to locate a syntax issue in a handwritten JSON payload.

Related guides and workflows

Guide

JSON Formatting for Developers (Pretty Print + Validation)

Learn how to format and validate JSON for debugging APIs and configs using CodeStorms Tools.

Guide

How to Use JSON Formatter Online

Learn how to use JSON Formatter online. Format and prettify JSON instantly with clean indentation.

📦 Supported formats 1 file types

JSON

❓ Frequently asked questions 3 answers

JSON formatting (or prettifying) adds consistent indentation and line breaks to minified or hard-to-read JSON so it's easier for humans to read and debug.

The editor accepts pasted JSON text up to its browser-side input limit and rejects oversized input safely.

Your JSON text is processed locally in your browser and is not uploaded to CodeStorms.