Go beyond text. With one API, you can add content, insert images, and fill interactive form fields - giving you full programmatic control over your PDFs.
Generate PDFs, extract structured JSON, and connect PrefillPDF to automation platforms, applications, databases, and spreadsheets.
Explore all integrations
Powerful template editor, simple API, and production-grade reliability. No complexity. No storage headaches. Just PDFs.
Visually map text, tables, and form fields directly on your PDF templates with our intuitive editor—no technical skills needed.
Insert text, tables, and prefill form fields into templates using simple HTTP API calls. Receive binary PDFs instantly.
Easily insert logos, signatures, stamps, or QR codes into templates by passing image URLs through the API at runtime.
Quickly connect your app with ready-to-go HTTP examples. Works seamlessly with cURL, Postman, Zapier, and more.
Apply dynamic text watermarks with full control over position, font, rotation, opacity, and color for branding or security.
Automatically detect and extract all form field names from your uploaded PDF templates via API, simplifying data mapping.
Our pay-as-you-go model means credits never expire. Only pay for the API calls you make, ensuring cost-efficiency.
We only store your templates. All input data and generated files are immediately deleted after API calls, ensuring your data privacy.
Built for performance with 99.8% uptime and a high success rate. Get fast, reliable PDF generation you can trust.
Trusted by thousands of companies generating millions of PDFs
Uptime Guarantee
Avg Generation
Compliance
No credit card required • Free tier includes 500 generations/month
The PrefillPDF Platform
Generate, protect, extract, and structure PDF data from one developer-friendly platform.
PDF Watermark API
Configure reusable watermark settings from your dashboard and automatically apply them to PDFs generated through the API.
Secure API Access
Create separate API keys for production apps, internal automations, and customer portals while monitoring usage from one dashboard.
PDF Text Extraction
Upload a document or provide a PDF URL and receive clean, structured text that can be used in your applications and automated workflows.
AI Extraction Schemas
Build custom extraction schemas visually, describe the fields you need, and receive predictable JSON from invoices, statements, applications, and more.
Generate customized PDFs with a few clicks-no complex setup, no storage needed.
Create a template by uploading your PDF. This is the only thing we store on our end.
Use our in-browser editor to visually map text and table fields onto your template.
Send data via API to insert content into the template. You'll receive a final PDF file instantly.
Monitor your usage, manage templates, and track every API call-all from a single, secure dashboard.
Your data never touches our storage-only your templates stay with us.
🔒 Maximum Privacy by Design
We do not retain or store any API-generated files. Templates are the only assets stored, giving you full control of file delivery and storage on your end.
We never store any data or files from API requests. You have full control of where your documents go.
We only store your uploaded templates for reuse. Generated files are streamed back and never saved.
Generated PDFs are returned immediately via API response. Nothing is retained on our servers.
Our flexible credit system means you only pay for what you use - with no surprises.
Purchase credits and use them for various API calls - no monthly commitment required.
Current rate
$1 = 50 credits
Generate branded, accurate invoice PDFs instantly with PrefillPDF. Eliminate manual edits and save time on billing.
Learn more →Generate consistent purchase order PDFs quickly and securely using your templates and API-driven data.
Learn more →Automate HR PDFs like onboarding, timesheets, and evaluations to reduce admin workload and boost accuracy.
Learn more →Generate prefilled application PDFs for customers or partners with ease, from onboarding to event registrations.
Learn more →Create polished report PDFs with charts, tables, and summaries that are accurate and ready for stakeholders.
Learn more →Generate proposals, brochures, and marketing PDFs at scale with consistent branding using your templates.
Learn more →Generate consistent, client-ready contracts and agreements from templates. Prefill fields via PDF API or no-code workflows-fast and secure.
Learn more →Generate certificates, awards, and completion PDFs from templates automatically. Prefill names, dates, and course details via PDF API or no-code workflows.
Learn more →Add text, tables, form fields, and images to your PDF templates with one secure HTTP request.
curl -X 'POST' \
'https://api.prefillpdf.com/fill-pdf' \
-H 'accept: application/json' \
-H 'Authorization: Bearer YOUR_API_KEY_HERE' \
-H 'Content-Type: application/json' \
-d '{
"template_id": "your-template-id-123",
"data": {
"customerName": "Jane Doe",
"invoiceNumber": "INV-2025-001",
"totalAmount": "$500.00"
},
"form-fields": {
"customer_name_field": "Jane Doe",
"invoice_number_field": "INV-2025-001",
"total_amount_field": "$500.00",
"date_field": "2025-09-21"
},
"images": {
"logo": "https://example.com/logo.png",
"signature": "https://example.com/signature.png"
}
}'Our API delivers fully filled PDFs directly in the response-no temp links or file storage involved. Just send your data and get a binary back instantly.
Start adding text to your PDFs programmatically today.