5 Real-World PDF Automation Tasks You Can Solve with fast-convert in Minutes

PDF files are everywhere in production systems — invoices, contracts, reports, medical records. Yet automating anything involving PDFs often feels like pulling teeth.
In this post, I'll walk through 5 practical scenarios developers actually face, and show how fast-convert solves each one cleanly.
🗂️ 1. Auto-generate image previews for uploaded PDFs
When users upload PDFs to your platform, you often need a thumbnail for the UI.
import { convert } from 'fast-convert';

async function generateThumbnail(pdfPath) {
await convert(pdfPath, {
to: 'png',
pages: [1], // first page only
dpi: 120,
output: './thumbnails/',
});
}
Drop this into your file upload handler — done.

1. Extract text from PDFs for search indexing Building a search feature over user-uploaded documents? You need raw text. fast-convert contract.pdf --to txt --output contract.txt Or in a batch loop: for f in ./uploads/*.pdf; do fast-convert "$f" --to txt --output "./indexed/$(basename $f .pdf).txt" done Feed the output into Elasticsearch, Typesense, or any search engine. 📬 3. Split a bulk invoice PDF into individual files Accounting systems often export hundreds of invoices as one giant PDF. You need them separated. // Split every page into its own file await convert('invoices_bulk.pdf', { splitByPage: true, output: './invoices/', namePattern: 'invoice_{page}.pdf', });
2. Compress PDFs before storing in S3 Storage costs add up. Compressing before upload is a no-brainer. await convert('scanned_report.pdf', { compress: true, compressionLevel: 'high', output: './compressed/report.pdf', }); In our tests, high-quality scans went from ~8MB → ~1.2MB with minimal visual loss.
3. Convert PDF forms to editable DOCX for re-use Got a legacy PDF form you need to turn into an editable template? fast-convert form_template.pdf --to docx --preserve-fields --output editable_form.docx The Bottom Line fast-convert isn't just a conversion tool — it's a productivity multiplier for any workflow that touches PDFs. These five patterns cover a huge chunk of what developers need day-to-day, and they all take under 10 lines of code. npm install fast-convert Which of these use cases is most relevant to your work?