Form Validation Generator

Design validation once and generate framework-neutral code.

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Fields

Choose one to edit.

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Framework-neutral form validation

Form Validation Generator models fields and rules in a portable schema, then produces Vanilla JavaScript, accessible native HTML, JSON Schema, or the schema itself. The generated logic is not tied to React, Vue, or another UI framework.

How to build a validation schema
  1. 1.Load an example or add fields.
  2. 2.Configure code names, field types, and validation rules.
  3. 3.Test the interaction in Preview and resolve Diagnostics.
  4. 4.Choose an output format, then copy, download, or export the portable project schema.
Validation behavior and accessibility

Choose submit, blur, or input validation. The preview separates validity from error visibility, while generated native HTML associates controls and error regions using accessible attributes.

Private and deterministic

Projects are generated and saved locally in this browser. The same schema and output format produce the same code, and no form definition or preview value is uploaded.