Form Validation
Validate emails, URLs, phone numbers, and more without writing complex regex.
- Email syntax
- Phone formats
- Password strength
- Luhn check
Give your AI agents deterministic tools via Model Context Protocol. Stop hallucinated math and made-up validations.
Claude Code, Cursor, and Windsurf can use TinyFn tools for accurate calculations, conversions, and validations while coding.
Build customer support bots that give accurate answers for calculations, timezone conversions, and data validation.
Autonomous agents need reliable tools. TinyFn provides 500+ deterministic utilities for any workflow.
The #1 reason developers choose TinyFn: zero bundle size impact for size-constrained environments.
Stay under the 3 MB limit. Ship fast Workers without npm package bloat. Zero-dependency utilities that just work.
Edge Runtime compatible utilities. Perfect for Next.js middleware, API routes, and edge-deployed applications.
Reduce INIT billing costs by up to 96%. Smaller bundles mean faster cold starts and lower AWS bills.
Validate emails, URLs, phone numbers, and more without writing complex regex.
Add fun and useful commands to your team chat. Instant morale boost.
Ship your MVP faster by skipping utility function implementations.
Clean and transform data with consistent, tested utilities.
Build command-line utilities that leverage our API. Quick scripts for common tasks.
Build health apps with BMI, BMR, calorie calculations. All formulas tested.
Get your free API key and ship your next feature faster.
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