Format & minify
Beautify with indentation or compress to a single line. Customizable indent size for reading or production.
Compress JSON into a single line to reduce payload size for production use.
From formatting and validation to conversion and export — 10 essential tools in one page. No install, no sign-up, ready to use.
Beautify with indentation or compress to a single line. Customizable indent size for reading or production.
Detect JSON syntax errors with precise line/column numbers. Catch trailing commas, quote issues, and more.
Side-by-side comparison of two JSON documents with highlighted additions, deletions, and changes.
Browse complex JSON in a collapsible tree. Copy paths to quickly locate nested fields.
JSON ↔ YAML, JSON → XML, JSON → CSV / Excel — for config authoring and data export.
Debug JSONPath expressions online. Extract nested fields with one-click templates.
Built for anyone who works with JSON daily — debugging, configuration, testing, and data export.
Everything runs locally in your browser. Paste JSON and see results instantly — nothing is uploaded.
Pick the feature you need from the top navigation — format, validate, diff, convert, and more.
Paste JSON into the input area, or click Load sample to try each feature instantly.
Results appear in real time on the right. Copy or download — all processing stays local.
The JSON minifier removes all unnecessary whitespace, line breaks, and indentation from your JSON documents. Ideal for reducing API payload size, optimizing config files, and preparing JSON for production environments.
{
"env": "production",
"debug": false,
"timeout": 30
}{
"users": [
{ "id": 1, "name": "Bob" },
{ "id": 2, "name": "Carol" }
]
}A JSON minifier (compressor) strips whitespace and line breaks from JSON, producing the smallest valid representation without changing data values.
Savings depend on indentation. A heavily formatted file with 4-space indents can shrink by 30–50% or more.
No. Minification only removes whitespace. Parsed values, key order, and structure remain identical.
Yes. JSON Toolbox is completely free with no sign-up, no usage limits, and no hidden fees.
Your data never leaves your browser. All parsing, formatting, and conversion runs locally on your device — nothing is sent to any server.
All modern browsers including Chrome, Firefox, Safari, and Edge. No plugins or extensions required.
Files over 2 MB may feel slow; files over 10 MB are blocked. For very large payloads, use a local CLI tool instead.
Only standard JSON (RFC 8259) is supported. JSON5 features like comments and trailing commas are not accepted.