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About this tool
Build forms with ease.
The Form Builder assembles a form from 16 field types using the browser's native HTML5 drag-and-drop API (dataTransfer), then exports it as plain HTML, a React JSX component, or a JSON schema. Everything runs client-side — the tool makes no network requests at all. Your layout autosaves to localStorage under a single formData key, and the Share button compresses the entire form definition with lz-string and packs it into the link itself as ?data=…, so the form travels in the URL rather than through a server.
Open Form Builder on AltFTool — it loads instantly in your browser.
Pick a template or describe your form, then drag field types in from the Add Field panel.
Click any field to set required, min/max length, or a custom regex pattern, and check it against the live preview.
Export as HTML, React JSX, or JSON — or download the standalone .html file or copy a share link.
Text, email, number, phone, URL, password, textarea, dropdown, radio, checkbox, date, time, date & time, file upload, range slider, and color picker — added by drag or click, reordered by dragging, with undo and redo on every change.
Set required, min length, max length, and a custom regex pattern per field. Email, URL, phone, and number min/max are checked automatically as you type in the preview.
Copy the form as HTML, as a React JSX component, or as a JSON schema — or download a complete standalone .html file that opens straight in a browser.
There is no backend and no upload. Work autosaves to your own browser's localStorage, and share links carry the form inside the URL as lz-string-compressed data.
Yes — this one is free and needs no account. It runs entirely in your browser: the tool makes no network requests, and your form is stored in your own browser's localStorage rather than on a server.
Click Export and choose HTML from the dropdown to copy the markup, or click Download to save a full .html file. The downloaded page is self-contained apart from one Tailwind Play CDN script tag it loads for styling, and its built-in submit handler reads the values with FormData and shows them back as JSON.
No. It builds and exports forms; it does not host them or store submissions. Submitting in preview shows your entered values as JSON, and the downloaded HTML does the same — to actually receive responses, point the exported form at your own endpoint or form service.
Sixteen: text, email, number, phone, URL, password, textarea, dropdown, radio buttons, checkboxes, date, time, date & time, file upload, range slider, and color picker. Any field can be duplicated, dragged to a new position, or deleted.
Click Share. The form definition is compressed with lz-string and appended to the page URL as ?data=…, then copied to your clipboard (or passed to your device's native share sheet). Anyone who opens that link gets the fillable form — the whole form lives in the URL, so it works without any hosting.
Yes. Every edit writes the fields, title, and description to localStorage under the key formData, and the builder restores them on your next visit in that same browser. Clearing site data, using private browsing, or switching browsers or devices loses the saved form.
No — it's keyword matching, not a model. Your description is scanned for terms like job, contact, signup, login, feedback, or survey and the matching starter set of fields is dropped in; anything else gets a default Name, Email, and Message layout. You edit from there.
It's a 0-100 score computed locally from three parts: the share of fields marked required (30 points), the share carrying validation — required, min or max length, a regex pattern, or an email/URL type (40 points), and the share that have both a label and a placeholder (30 points).