JSON Schema & GraphQL Form Builder

Build forms visually with drag-and-drop, then export as JSON Schema. No account needed, no data collected, works fully offline.

JSON Form Builder is a free, visual form builder that lives entirely in your browser. Add fields, configure validation, and instantly get clean JSON Schema output — with no account, no internet connection, and no data leaving your machine. Build forms visually Drag and drop field types from the sidebar onto the canvas. Reorder them at any time by dragging. Click any field to open its editor and configure the label, field name, placeholder text, required state, and type-specific options like min/max values or dropdown choices. 20+ field types supported Text, Email, Password, Number, Checkbox, Dropdown (single and multi-select), Radio Buttons, Textarea, Date Picker, Phone, URL, Search, File Upload, Time, DateTime, Range Slider, Color Picker, Month, Week, and Hidden fields. Live form preview See your form rendered in real time as you build it. Interact with inputs, check checkboxes, and select options — all before exporting a single line of code. Export in 4 formats Once your form is ready, click "View Code" to export it as: - React — functional component with useState - Vue 3 — single-file component using the Composition API - HTML — standalone HTML form with no dependencies - CSS — the stylesheet to match the dark preview theme JSON Schema output Every form generates a valid JSON Schema (draft 2020-12) in the sidebar. Copy it to the clipboard, download it as a .json file, or import an existing schema to continue editing. Form templates Start from a pre-built template (Contact Form, Login Form, Registration Form, and more) to hit the ground running. Undo / reset Full undo history — press undo to step back through any change. Reset clears the canvas in one click. Privacy first No data is collected. No network requests are made. No browser storage is used. Everything you build exists only in memory for the duration of your session. The extension requires zero permissions.