Form Validation Generator
Design form fields and simultaneously generate semantic HTML5 markup, typed Zod validation schemas, and accessible Vanilla JS Constraint Validation code.
Private by architecture:
All processing is 100% client-side memory. Your data never leaves this browser tab.
Form Fields
| Field Name & Label | Type | Required | Constraints & Pattern | Custom Error Message | Action |
|---|
About This Tool
Form Validation Generator bridges frontend markup, client-side validation logic, and backend TypeScript schemas. Define form fields once and immediately get accessible HTML5 forms, strict Zod schemas, and vanilla JS event handlers.
Generated forms include WCAG-conscious accessible attributes like aria-required, aria-live error containers, and aria-invalid state toggles. Everything runs in-memory with zero server transmissions.
Key Features
- Triple-Artifact Generation: Exports semantic HTML5 markup, full Zod v3 schemas, and zero-dependency Vanilla JS Constraint Validation scripts in sync.
- Full Field Types Support: Handles text, email, password, number, url, tel, date, select dropdowns, textareas, and required checkbox agreements.
- Built-in Validation Rules: Configure min, max, minlength, maxlength, regex patterns, required flags, and custom localized error strings.
- Real-Time Interactive Editor: Add, remove, and modify fields with instant preview and one-click copy or file export.
Frequently Asked Questions
Why should I use both HTML5 attributes and a JS validation library?
HTML5 constraint attributes give immediate browser feedback and accessible screen reader hints, while Zod or JS validation ensures consistent formatting and enables backend validation parity.
Does the vanilla JS snippet require any framework or bundler?
No. The generated script is completely self-contained and uses standard DOM Constraint Validation APIs (validity.valueMissing, validity.typeMismatch, checkValidity).
How do custom error messages work in the generated code?
Custom messages are serialized as data-custom-error attributes on inputs in HTML5, as errorMap strings in Zod, and are displayed dynamically inside polite aria-live containers by the JS script.
