pdf-autofillr — Node.js SDK

TypeScript/Node.js SDK for AI-powered PDF form filling — extract fields, map data, and fill any PDF form automatically.

Quick Start · Python SDK · Live Platform · CLI

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Status: This SDK is under active development. For production use today, see the Python SDK or the live platform at pdffillr.ai.

What it does

pdf-autofillr extracts form fields from any PDF, maps your data to those fields using an LLM of your choice, and returns a filled PDF — programmatically, at scale.

Blank PDF + your data
        │
        ▼
  embed (once per template)  ← extract fields → LLM map → bake metadata
        │
        ▼
  fill (per submission)      ← inject data → return filled PDF

Installation

npm install pdf-autofillr
# or
yarn add pdf-autofillr

Quick Start

import { PDFAutofillr } from "pdf-autofillr";
import { readFileSync, writeFileSync } from "node:fs";

async function main() {
  const client = new PDFAutofillr({ apiKey: process.env.PDF_AUTOFILLR_API_KEY });

  // Step 1: Embed metadata into a template (once per PDF)
  const embedded = await client.embed({
    pdf: readFileSync("form.pdf"),
    schemaKeys: ["first_name", "last_name", "date_of_birth"],
  });

  // Step 2: Fill the template with data
  const filled = await client.fill({
    pdf: embedded.pdf,
    data: { first_name: "Jane", last_name: "Doe", date_of_birth: "1990-01-15" },
  });

  writeFileSync("filled_form.pdf", filled.pdf);
}

main();

Requires Node.js 18+ (ESM or CJS with async/await support).

Supported LLMs

Works with any LLM via the platform:

Provider	Models
OpenAI	gpt-4o, gpt-4o-mini
Anthropic	claude-3-5-haiku-latest, claude-3-5-sonnet-latest
Google	gemini-1.5-flash, gemini-1.5-pro
Ollama (local)	llama3.1, mistral

Related

Package	Language	Description
pdf-autofillr-python-sdk	Python	Full-featured Python SDK (stable)
pdf-autofillr-cli	CLI	Fill PDFs from your terminal
pdf-autofillr-plugins	Any	Custom extractors and LLM adapters
autofiller-community	Open-source	Community models and domain packs

Contributing

Contributions are welcome! Open an issue or submit a pull request.

License

MIT — see LICENSE