AI Form Autofill Implementation

AI Form Autofill on Website

Intelligent form field prediction using browser history, cookies, and AI models. Reduces friction for checkout, sign-up, and long forms. Increases conversion by 5–15%.

Implementation

Use OpenAI or Claude to suggest field values based on context:

async function predictFormValues(userId, formType) {
  const userHistory = await getUserHistory(userId);
  const formContext = getFormContext(formType);

  const response = await openai.chat.completions.create({
    model: 'gpt-4o-mini',
    response_format: { type: 'json_object' },
    messages: [{
      role: 'user',
      content: `Predict form values. Type: ${formType}. History: ${JSON.stringify(userHistory)}`
    }],
  });

  return JSON.parse(response.choices[0].message.content);
}

Client-Side Integration

class FormAutofill {
  constructor(formEl) {
    this.form = formEl;
    this.attachListeners();
  }

  attachListeners() {
    const inputs = this.form.querySelectorAll('input, textarea, select');
    inputs.forEach(input => {
      input.addEventListener('focus', (e) => this.suggestValue(e.target));
    });
  }

  async suggestValue(input) {
    const predictions = await fetch('/api/form-predict', {
      method: 'POST',
      body: JSON.stringify({ fieldName: input.name, fieldType: input.type }),
    }).then(r => r.json());

    if (predictions.value) {
      this.showSuggestion(input, predictions.value);
    }
  }

  showSuggestion(input, value) {
    const suggestion = document.createElement('div');
    suggestion.className = 'autofill-suggestion';
    suggestion.textContent = `Did you mean: ${value}?`;
    suggestion.onclick = () => {
      input.value = value;
      suggestion.remove();
    };
    input.parentElement.appendChild(suggestion);
  }
}

Privacy & Performance

• Use browser storage (localStorage) as primary cache
• Only send field names, not sensitive data
• Cache predictions for 30 days
• Don't collect payment data (use Stripe/PayPal autofill)

Timeline

• Basic autofill with browser cache — 2–3 days
• AI prediction integration — 2 days
• Privacy compliance + GDPR — 1 day
• Testing & optimization — 2–3 days