JSON Minifier - Compress & Minify JSON Online

A JSON minifier removes spaces, tabs, and line breaks from JSON to reduce its size. It keeps the data identical while making the file smaller for faster transfers and storage. Use it to prep API responses, config files, or bundles for production. Processing runs in your browser, so your data stays private.

1. Paste JSON: Add formatted or unformatted JSON of any size.
2. Minify: Click Minify to strip whitespace.
3. Copy or download: Copy the compact JSON or save it as a .json file.

• Faster delivery: Smaller payloads load quicker over networks.
• Lower storage: Save space in caches, logs, or embedded scripts.
• Local privacy: No JSON leaves your device during minification.

Use case 1: API responses

Minify responses before caching or embedding in client-side bundles.

Use case 2: Config deployment

Ship compact configs to production to reduce transfer time in CI/CD pipelines.

Use case 3: Log storage

Store minified JSON logs to reduce disk usage without losing data.

Basic example

Input:

{
  "name": "Alice",
  "roles": ["admin", "editor"],
  "active": true
}

Output: {"name":"Alice","roles":["admin","editor"],"active":true}

Advanced example

Input: 5 KB formatted analytics payload
Output: A single-line JSON string several KB smaller, ready for transport.

Invalid JSON

Minification fails on syntax errors. Validate with the JSON formatter first.

Comment handling

If comments are present, ensure the tool is set to strip them; standard JSON does not allow comments.

• Format during development with the JSON formatter, then minify before release.
• Compress further with gzip or brotli in your server or CDN.
• For config files, keep a formatted source in repo and minify during build steps.

• Encode data for transport with the Base64 encoder/decoder.
• Beautify XML using the XML formatter when working across formats.

Minification happens locally in your browser. No JSON content is uploaded or stored.