JWT Decoder
Decode, sign, and verify JSON Web Tokens.
{}
JSON Formatter
Prettify, minify, and validate JSON.
{
"name": "toco.tools",
"tools": 27,
"ok": true
}
About JSON Formatter
A JSON formatter prettifies minified payloads, compacts whitespace, and flags syntax errors—standard for API debugging and config review.
toco.tools indents with spaces or tabs, minifies, and highlights parse errors entirely in the browser.
Very large documents may slow the tab. Processing is local, but avoid shoulder-surfing on shared machines.
How to use
- Paste JSON into the editor
- Format, minify, or validate
- Copy the output
FAQ
What is a JSON formatter?
A tool that indents JSON for readability and checks for syntax errors.
Does it support Japanese in JSON?
Yes. UTF-8 JSON with Unicode text is handled normally.
Is JSON sent to a server?
No. All processing runs in your browser.