JSON Key Sorter

About JSON Key Sorter Tool

This free online JSON key sorter tool lets you alphabetically sort all keys in a JSON object with a single click. Whether you need consistent key ordering for version control diffs, API response comparison, or code style enforcement, our tool handles nested objects, arrays, and all JSON data types while preserving values exactly. Everything runs 100% in your browser with no data uploaded anywhere.

Why Sort JSON Keys?

Unsorted JSON objects produce noisy diffs in version control when keys appear in different orders across commits. Sorting keys alphabetically makes JSON files deterministic — identical data always produces identical output. This is essential for configuration files (package.json, tsconfig.json), API contract testing, snapshot testing in Jest or Vitest, comparing database records, generating stable hashes, and maintaining readable codebases. Many linters and formatters (ESLint, Prettier, sort-package-json) enforce key ordering for exactly these reasons.

How to Use This JSON Sorter

Paste your JSON into the input panel and click "Sort Keys." The tool parses the JSON, recursively sorts all object keys in alphabetical (A→Z) or reverse (Z→A) order, and outputs the result with your chosen indentation. Toggle "Recursive" to sort only top-level keys, or enable "Sort primitive arrays" to also sort arrays of strings and numbers. The output preserves all values, types, and array element order (unless you enable array sorting). Copy the result with one click.

Key Benefits

• Deterministic output: Same data always produces the same JSON string, perfect for diffs and hashing
• Deep recursive sorting: Sorts keys at every nesting level, not just the top
• Configurable direction: Alphabetical (A→Z) or reverse (Z→A) ordering
• Array sorting option: Optionally sort arrays of primitive values (strings, numbers)
• Value preservation: All values, types, arrays, and nulls remain exactly as they were
• Configurable indentation: Choose 2 spaces, 4 spaces, or tab indentation for output
• Completely private: Your JSON never leaves your browser — safe for secrets and credentials
• No installation: Works instantly in any modern browser without plugins or sign-ups

Common Use Cases

Developers sort JSON keys for clean git diffs in package.json, tsconfig.json, and other config files. QA engineers use sorted JSON to compare API responses deterministically. DevOps teams normalize Terraform state files and Kubernetes manifests. Frontend developers sort component prop types and theme tokens for consistency. Database administrators compare JSON columns across records. Security teams generate stable hashes of JSON payloads for integrity verification. Technical writers maintain consistent documentation examples.

Technical Features

The sorter uses JavaScript's localeCompare for culturally-aware key ordering, handles deeply nested objects and arrays of any depth, preserves null, boolean, number, and string values exactly, supports both standard and minified JSON input, produces clean formatted output with configurable indentation, handles large JSON documents efficiently, and validates input syntax before sorting with clear error messages for malformed JSON.

Privacy and Security

All JSON sorting happens locally in your browser using JavaScript. Your configuration files, API responses, database records, secrets, and any other JSON data never leave your computer. No cookies, no tracking, no server communication. Safe for production data, credentials, and confidential information.