About Signalbench
Signalbench is a collection of narrow tools for understanding data before it reaches another system.
More Signalbench tools
Small tools for stubborn bugs.
Format JSON, inspect JWT claims, explain cron expressions, and compare text locally in your browser.
Format and validate JSON without leaving your browser.
Format, indent, and validate JSON locally in your browser, with a clear error message when the syntax is invalid.
Decode a JWT and read its claims.
Decode a JSON Web Token locally to read its header and payload claims — decoding a JWT is not the same as verifying it.
Understand any cron expression at a glance.
Parse a five-field cron expression and see the minute, hour, day, month, and weekday fields explained in plain language.
A local-first workbench
The utilities run in the browser and do not require an account. That keeps the feedback loop short and avoids creating an application database for pasted values.
Deliberate limits
A browser utility cannot replace a production validator, security review, chain node, or standards document. Each tool explains what it checks and what still needs authoritative verification.
Signalbench
Inspect, transform, and debug data without sending it away.