Stop asking users to fill forms.
Let Fillenza do it for them.

A privacy-first AI widget that transforms unstructured text, documents, and images into structured form data. One script tag. No form rewrites. Works with your existing HTML.

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End-to-end encrypted RSA-OAEP-256 + AES-256-GCM
Seconds, not minutes From input to filled form
Zero dependencies Pure vanilla JS, no frameworks
5+ input formats Text, PDF, DOCX, images, scans

How It Works

From unstructured input to filled form fields in three steps.

1

Paste or Upload

Users paste free text, drag and drop a PDF, DOCX, image, or even a scanned document into the widget input area.

2

AI Extracts & Maps

Context-aware AI understands the content and maps extracted data to the correct form fields. No regex, no brittle rules.

3

Fields Populate

Form fields are filled automatically with confidence scores. Users review, adjust if needed, and submit.

Why Fillenza?

Built for developers who value simplicity, privacy, and control.

Simplicity

One script tag. Minimal configuration. Works out of the box with your existing HTML forms. No rewrites, no migrations.

Intelligence

Context-aware AI that understands intent and meaning. Not regex. Not brittle rules. True semantic understanding of input data.

Privacy

End-to-end encrypted with RSA + AES. Data is processed, never stored. Unique key pairs per request. No model training on your data.

Multimodality

Accepts free text, PDFs (text and scanned), DOCX files, and images. Drag and drop, clipboard paste, or manual upload.

Control

Field-level configuration with data-ai-* attributes. Confidence scoring per field. CSS classes for styling filled and uncertain fields.

Developer Experience

Minimal setup time. Debug mode with detailed logging. Comprehensive documentation. Works with any front-end stack.

Any Input, Structured Output

Fillenza handles the full spectrum of unstructured input formats.

Free Text

Paste unformatted text from any source. AI parses names, addresses, dates, and more from natural language.

PDF Documents

Text-based and scanned PDFs alike. Built-in OCR support extracts data from digitized paper documents.

DOCX Files

Upload Word documents directly. Fillenza reads structured and semi-structured content from .docx files.

Images

Photos of business cards, ID documents, receipts. PNG and JPEG support with AI-powered visual understanding.

Scanned Documents

Paper forms, certificates, and official documents. OCR extraction turns scans into structured form data.

Security & Privacy

Processed, not stored. Every request is encrypted with unique keys.

Client
AES-256-GCM
Server
  • Forward secrecy Unique key pair generated for every single request
  • One-time tokens Short-lived JWT with single-use enforcement
  • Automatic deletion All input data erased immediately after processing
  • No training on your data Your users' data is never used to train AI models
  • TLS 1.2+ transport All communication over encrypted channels

Built for Developers

Works with your existing forms. No rewrite needed.

<!-- 1. Load the script --> <script src="https://cdn.fillenza.com/fillenza.umd.js"></script>   <!-- 2. Initialize --> <script> Fillenza.init({ publishableKey: 'pk_live_...', formSelector: '#my-form' }); </script>
<!-- Fine-tune field mapping with data attributes --> <input type="text" name="fullName" data-ai-type="name" data-ai-semantic="user's full legal name" />   <input type="email" name="email" data-ai-type="email" data-ai-semantic="primary email address" />   <!-- Confidence-based styling --> <!-- .fillenza-filled — successfully mapped --> <!-- .fillenza-low-confidence — needs review -->

Simple, Usage-Based Pricing

Start free. Scale as you grow. No surprises.

FREE

Free

$0 /mo
  • 50 Smart Fills / month
  • 1 test API key
  • Full AI features
No credit card required
DEVELOPER

Developer

from $24 /mo
  • 3,000 - 200,000 Smart Fills
  • Test API keys
  • Rebate program
5 tiers available (D1-D5)
PRODUCTION

Production

from $49 /mo
  • 6,000 - 300,000 Smart Fills
  • Live API keys (domain-bound)
  • Auto-renewal on quota use
5 tiers available (P1-P5)
View All Plans

Developer Rebate Program

Build with Fillenza. Earn back your subscription cost — and more.

How it works

As a Developer tier subscriber, you earn a percentage rebate on the Production tier revenue generated through your widget integrations. The rebate is automatically applied as a discount on your next Developer subscription payment.

Example

A D3 subscriber ($139/mo) manages clients generating $5,000/mo in Production revenue. At 3% rebate, that is $150 back — fully covering the Developer subscription cost.

  • Calculated automatically every month
  • Applied directly to your next invoice
  • Higher tier means higher rebate percentage
  • Can fully offset your Developer subscription cost

Rebate rates by tier

D1 1% $24/mo
D2 2% $59/mo
D3 3% $139/mo
D4 4% $339/mo
D5 5% $1,190/mo

Rebate is calculated on total Production tier revenue from your client integrations. Your best available rate applies automatically.

Frequently Asked Questions

How does Fillenza work?

Fillenza is a JavaScript widget that you embed in your site with a single script tag. When a user pastes text, uploads a document, or drops an image, the widget sends the encrypted input to Fillenza's AI backend. The AI extracts relevant data and maps it to your form fields based on field names, types, and optional semantic hints you provide.

What is a Smart Fill?

A Smart Fill is one AI-powered form completion. When an end user submits text, a document, or an image through the Fillenza widget, and the AI generates form field suggestions, that counts as one Smart Fill.

What file types does the widget support?

The widget accepts free-form text, PDF documents (text-based and scanned via OCR), DOCX files, and images (PNG, JPEG). All input is processed by AI to extract structured form data.

How secure is it?

Every request uses end-to-end encryption with a unique RSA-OAEP-256 key pair for key exchange and AES-256-GCM for payload encryption. Data is processed in memory only and automatically deleted after extraction. We never store user input, and no data is used for AI model training. Transport is secured with TLS 1.2+.

What types of forms does it work with?

Fillenza works with any standard HTML form. Text inputs, textareas, selects, checkboxes, and radio buttons are all supported. You do not need to modify your form structure. Optional data-ai-* attributes let you fine-tune how fields are matched, but they are not required.

Do I need to rewrite my forms?

No. Fillenza is designed to work with your existing HTML forms as-is. Add the script tag, call Fillenza.init() with your API key and form selector, and you are done. The optional data-ai-* attributes provide additional hints but are not mandatory.

Which AI models does Fillenza use?

Fillenza is provider-agnostic. The platform supports multiple AI providers including OpenAI, Anthropic, and local LLMs. This avoids vendor lock-in and allows selecting the best model for each use case. The specific model used is transparent to the integration.

How much does it cost?

There is a free tier with 50 Smart Fills per month and no credit card required. Paid plans start at $24/month for Developer tiers and $49/month for Production tiers, scaling up based on usage. All pricing is usage-based with monthly billing through Paddle.

What's the difference between Developer and Production tiers?

Developer tiers include test API keys (pk_test_...) for development and testing only — they cannot be used in commercial environments. Production tiers include live API keys (pk_live_...) that are domain-bound and intended for production use.

Can I upgrade, downgrade, or cancel anytime?

Yes. You can change or cancel your plan at any time through the Fillenza Portal. When downgrading, the pro-rated difference is added to your Credit Balance and applied to your next payment. After cancellation, you keep full access until the end of your current paid period.

Ready to simplify form filling?

Start with 50 free Smart Fills. No credit card. No commitment.

Get Started Free