Small tools for stubborn bugs.
A focused developer workbench for inspecting data without pasting it into a remote service.
Inspection input
Inspection output
text
Processed locally — inputs and results stay in this browser tab. Copy and download actions run only when you choose them.
More Signalbench tools
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.
Compare two texts line by line.
Compare two blocks of text line by line and see exactly which lines were added, removed, or unchanged, locally in your browser.
Built for inspection, not trust
Signalbench helps you inspect structure and spot mistakes. Decoding a token is not signature verification, and a formatted payload is not proof that an API will accept it.
- Inputs stay in this browser tab.
- Copy or download every generated result.
- Technical notes state the limits of each tool.
When to use it
Use the workbench while reviewing logs, reproducing API requests, checking scheduled jobs, or preparing a minimal bug report. Remove secrets before sharing any result.
Signalbench
Inspect, transform, and debug data without sending it away.