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Boolean Expression Tester

Evaluate a boolean expression using named true/false variables.

Calculations run in your browser. The tool does not send your inputs to a server.

01Your inputs

Local workspace

Start with the sample below, or enter your own values.

Use valid JSON with double-quoted keys and strings. The example shows the expected structure.

02Your result

Your result will appear here. Choose an action after checking your inputs.

A quick guide

How to use this tool

  1. Check the example and the unit beside each input.
  2. Enter your values and choose Test.
  3. Review the result and assumptions, then copy what you need.

Reset example restores the starting values. Clear removes text and number inputs, returns choices to their first valid option, and removes the result.

Reference guide

Explanation and worked examples

NOT binds before AND, then OR. Use parentheses to make the intended grouping explicit. No supplied code is executed.

Use in day-to-day IT work

Document a scheduled task, integration or repeatable operations workflow.

Checks before applying the result

  • Set an owner, timeout, bounded retry policy and failure notification before enabling a job.
  • Test duplicate input, partial failure and recovery in a non-production environment.
New to the terminology?
Backoff
Waiting progressively longer between retry attempts.
Jitter
Varying delays to avoid many clients retrying together.
Cron
A field-based expression selecting scheduled times.

Keep exploring

Cron Expression BuilderCron Expression ExplainerSchedule VisualiserRetry / Exponential Backoff Calculator

How calculations work and where the models stop →