Free Sandbox Beta

Create Fillable PDF Forms Online — Free Form Builder

Transform any PDF into an interactive fillable form. Add text fields, checkboxes, radio buttons, and dropdown menus with full customization — all processed in your browser.

📋 Interactive — Create professional fillable forms

🔒 Private — Forms created locally, no uploads

🆓 Free — Unlimited form fields during beta

Launch Studio 🚀

Why Choose Our PDF Form Builder?

Complete Privacy

Your PDF never leaves your device. Cloud form builders upload files to servers for processing. LocalPDF creates forms entirely in your browser using client-side rendering.

Professional Form Fields

Add text fields, multi-line text areas, checkboxes, radio button groups, and dropdown menus. Each field is fully customizable with validation options.

No Subscription Required

Most PDF form builders charge $10-30/month for form creation. LocalPDF is completely free during beta with no feature restrictions.

Real-Time Preview

See exactly how your form will look while building. Drag, drop, and resize fields with instant visual feedback.

Standards-Compliant

Creates AcroForm fields that work with all PDF readers including Adobe Acrobat, Preview, Chrome, and mobile apps.

Preserve Original Quality

Form fields are added as an interactive layer. Original PDF content remains untouched and at full resolution.

Key Features

✓ Text fields (single-line and multi-line)

✓ Checkboxes with default states

✓ Radio button groups

✓ Dropdown menus with custom options

✓ Drag-and-drop field placement

✓ Resize fields visually

✓ Set required/optional fields

✓ Read-only field support

✓ Field name customization

✓ Multi-page form support

How It Works

Click "Open Tool" button above

Upload the PDF you want to convert to a form

Click field type buttons (Text, Checkbox, Radio, Dropdown)

Drag and position fields on your PDF pages

Customize field properties in the right panel

Set field names, defaults, and validation rules

Download your fillable PDF form

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100% Private Sandbox: Your files never leave your device. All processing happens locally in your browser's secure memory.

Frequently Asked Questions

Are my files uploaded to a server?

Never. All processing happens 100% locally in your browser. Your files stay on your device, ensuring total privacy and security.

Is there a limit on file size?

There are no artificial limits. The only constraint is your device's available memory. Most modern computers and phones can handle large PDF files without issues.

Does it work on mobile devices?

Yes! LocalPDF Sanctuary is fully responsive and works on iOS, Android, and tablets through any modern web browser.

Technical Architecture: How it Works

Zero-Knowledge Architecture

Our system is designed so that your data is never seen by anyone else. Processing happens in the browser's secure memory space.

WebAssembly Performance

We use high-performance WebAssembly modules to achieve desktop-grade PDF processing speeds directly in your web browser.