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Sparrow Works / Free tools

Small checks.
Fewer loose ends.

Convert UK dates, check an agent response or inspect a webhook before mapping it into your workflow.

Runs in your browser. Nothing you paste is stored or sent.

UK date to ISO
Turn day-first dates into ISO dates, with a clear error for each invalid line.
Agent output validator
Check JSON, required keys, tool-call arguments and possible secret patterns.
Webhook payload checker
Inspect field paths and types before mapping JSON into Airtable.

Need help with the workflow?

Henry Williams is a sole trader in London. For a broken integration or a more reliable agent workflow, explore the services and agreed scopes.

Tool inputs stay in the current page's memory. No account or upload is needed. Theme changes on these pages are temporary.