Architecture difference
Uniforms takes your existing data schema — a Zod object, a JSON Schema, a GraphQL type — and uses it to auto-generate a form viaAutoForm. The schema adapter pattern means you define your data model once and get a form with validation for free. Uniforms has theme packages for Material UI, Ant Design, Bootstrap, Semantic UI, and Tailwind that map schema field types to appropriate components. This is a great ergonomic shortcut for straightforward CRUD forms.
FormEngine does not derive forms from your data schema. Instead, you write (or generate via Designer) a FormEngine schema that describes the UI explicitly — which components to use, how they’re laid out, what validation rules apply, what happens on events, and how fields interact conditionally. This is more work upfront but gives you full control over behavior that a data schema cannot express: computed display values, complex conditional visibility, cross-field interactions, localization overrides.
The other architectural difference is runtime loading. Uniforms is authored in code at build time. FormEngine’s getForm prop accepts a function — so the schema can come from a database, API, or CMS and change without a redeploy.
Feature comparison
| Feature | Uniforms | FormEngine |
|---|---|---|
| Form definition source | Your data schema (Zod, JSON Schema, etc.) | FormEngine JSON schema |
| Auto-generate form from data schema | Yes (AutoForm) | No |
| Runtime schema loading (from API/DB) | No | Native |
| Conditional field visibility | Limited | Declarative (renderWhen) |
| Computed property values | No | Yes |
| Actions and event handlers | No | Yes |
| Visual drag-and-drop form editor | No | FormEngine Designer |
| MUI support | Yes (theme package) | Yes (native adapter) |
| Ant Design support | Yes (theme package) | Community adapter |
| Tailwind support | Yes (theme package) | Custom adapter |
| Zod validation | Yes (schema adapter) | Yes (built-in) |
| Yup validation | Yes (schema adapter) | Via custom rules |
| Localization / i18n | Partial | Built-in |
| TypeScript support | Yes | Yes |
| License | MIT | MIT (Core); commercial (Designer) |
When Uniforms is the right choice
- Your forms directly mirror a backend data model and you want to derive them from that model automatically
- You’re using SimpleSchema or GraphQL and want out-of-the-box form generation
- Your forms are primarily CRUD operations with standard field types and simple validation
- Your team is comfortable with Uniforms’ schema adapter conventions and has stable, code-owned forms
When FormEngine is stronger
- Your forms need runtime loading — schema comes from a database, API, or CMS
- Your forms have complex conditional logic, computed fields, or cross-field dependencies that go beyond what a data schema can express
- Non-developer teams need to create or edit forms via a visual interface
- You need to manage localization of form labels and messages within the form schema
- You need fine-grained event handling (multi-step submission, conditional API calls, form state reactions)
Migration playbook
Uniforms and FormEngine schemas are not compatible, so migration requires rewriting form definitions. The incremental approach works well:- Keep stable Uniforms
AutoFormimplementations unchanged. - For new forms that need runtime loading, conditional logic, or visual authoring, write them in FormEngine Core.
- Reproduce Zod validation rules in FormEngine’s Validation schema — the Zod rules map closely.
- Move event handling to Actions and events.
- Add FormEngine Designer to let non-developers create form schemas without writing JSON.
FAQ
Can FormEngine auto-generate forms from a Zod schema like Uniforms does?
No. FormEngine requires an explicit UI schema. However, if you use FormEngine Designer or the AI Form Builder, you can generate a FormEngine schema quickly without writing it by hand.Both libraries support Zod — is the validation equivalent?
Both use Zod for validation, but in different ways. Uniforms uses Zod as the data schema that drives form generation. FormEngine uses Zod rules in the validation section of each component’s schema definition. They reach the same validation outcomes through different paths.Does Uniforms support runtime schema loading?
No. Uniforms form definitions are authored in code at build time. FormEngine’sgetForm callback accepts schema from any source, including API responses and database records.
Can both libraries coexist?
Yes. There is no conflict in having Uniforms-powered CRUD forms and FormEngine-powered runtime or visually-authored forms in the same application.Why move from Uniforms at scale?
Teams typically move when forms have outgrown what the data schema pattern can express — complex conditional behavior, per-user form variations stored in a database, or the need for non-developer participation in form creation. Uniforms doesn’t have a visual authoring layer, so any form change requires a developer.What does FormEngine add that Uniforms doesn’t provide?
The three main additions are: (1) runtime JSON loading from any source, (2) declarative conditional logic and computed properties in the schema, and (3) FormEngine Designer — an embeddable visual editor for non-developers.See also
- Customer onboarding forms — schema-per-tenant, plan-tiered fields, ops-editable forms
- Inspection and data collection forms — Repeater, conditional sections, runtime schema
- Dynamic form from JSON tutorial — schema loading patterns
- Conditional fields tutorial — renderWhen patterns beyond data-schema constraints
- Core vs Designer: pricing and licensing
- GitHub repository
- Designer pricing