About Form Builder

Build interactive forms with validation rules, field types, and conditional logic. Part of the DevTools Surf developer suite. Browse more tools in the Web / Frontend collection.

Use Cases

• Prototype lead-capture forms before integrating with a CRM backend.
• Generate accessible input markup with label associations and ARIA attributes already wired.
• Build multi-step wizards with progress indicators for onboarding flows.
• Create survey forms with conditional branching to skip irrelevant sections.

Tips

• Use conditional logic to show/hide fields based on prior answers, keeping forms shorter for users who don't need every field.
• Set field-level validation rules (required, min/max length, regex pattern) before exporting so the generated code already includes them.
• Preview the form in mobile viewport before finalizing — multi-column layouts often need stacking adjustments on small screens.

Fun Facts

• Web forms date to HTML 2.0 in 1995 — the original spec supported only text inputs, checkboxes, radio buttons, and a single submit button.
• Studies from 2021 show that reducing a form from 11 fields to 4 increases conversion rates by up to 120%, making field count the single biggest lever in form UX.
• The HTML5 constraint validation API (2014) let browsers enforce required/pattern/min/max natively without JavaScript — but custom error messages still require JS to override browser defaults.

FAQ

Can I export the form as React or plain HTML?

Both outputs are available. The React export uses controlled components with useState; the plain HTML version uses native constraint validation attributes.

Does it support file upload fields?

Yes — file inputs include accept MIME type filtering and max-size attributes in the generated markup.

How does conditional logic work?

Each field can have show/hide rules tied to another field's value. The export includes the corresponding JS or React state logic to implement it.

Are the forms accessible?

Generated markup follows WCAG 2.1: every input has an associated label, error messages reference inputs via aria-describedby, and focus order matches visual order.