Smart Formatter is a universal data formatter that detects what you've pasted and formats it correctly — without you having to know which tool to reach for. JSON gets pretty-printed, JWTs get decoded, URLs get parsed, UUIDs get validated, timestamps get converted. One tool, every format.
What is Smart Formatter?
Smart Formatter analyzes any text you paste and identifies the data type automatically. It then applies the appropriate formatting or decoding operation and renders a clean, structured output. Think of it as a universal clipboard formatter — paste anything and it figures out the rest.
Why Use Smart Formatter?
Developers constantly switch between specialized tools: a JSON viewer here, a JWT decoder there, a Base64 decoder somewhere else. Smart Formatter eliminates that friction. Paste the data once and get the right output immediately — no mental overhead of selecting the right tool first.
Supported Data Types
JSON — pretty-printed with syntax highlighting
JWT — header, payload, and signature decoded
cURL — command parsed and formatted
URL — query params broken out into key/value pairs
Smart Formatter detects the type and formats it instantly
Review the formatted output
For complex types (JSON, JWT, CSV), use the 'Send to' button to open the dedicated tool with data pre-filled
Copy the formatted result to clipboard
Example Use Case
You copy a JWT from an Authorization header in your browser DevTools. Paste it into Smart Formatter — it detects the JWT, decodes all three parts (header, payload, signature section), and shows the claims. You can then click 'Send to JWT Toolkit' to open the full JWT tool if you need to inspect signatures or generate a new token.
Tips
Works great as a first-pass formatter — paste anything you copy from logs, API responses, or DevTools
Use 'Send to' for deeper analysis — Smart Formatter routes you to the right specialized tool with data already loaded
Timestamps are detected for both 10-digit (seconds) and 13-digit (milliseconds) Unix values
Minified JSON is auto-pretty-printed — no need to manually format before pasting
Ready to try it?
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Frequently Asked Questions
Yes, completely free with no signup required.
No. All detection and formatting runs locally in your browser. Nothing is transmitted.
Detection is sequential and prioritized — JWT before Base64, for example. Edge cases can fool the detector. For ambiguous data, use the dedicated tool directly (e.g. JSON Viewer for large JSON).
Yes for most types. Very large JSON (many MB) is routed to the JSON Viewer which is optimized for large data browsing.