Developer Tools
Code Formatter
Format and beautify JSON, CSS, HTML, and SQL code instantly. Free, in-browser, no upload.
Indent:
{
"name": "Alice",
"age": 30,
"active": true,
"tags": [
"admin",
"user"
]
}All formatting runs in your browser — code never leaves your device. JSON uses native JSON.parse for correctness.
How to Format Code Online: JSON, CSS, HTML, SQL (No Upload, No Login)
Why code formatting matters for readability and diffs, how JSON, CSS, HTML, and SQL formatters work, and which tools process code locally without uploading it.