How to Automate PDF Generation
Manually creating PDFs for invoices, reports, or certificates doesn't scale. Automating PDF generation through an API lets your application produce documents on demand — triggered by user actions, scheduled jobs, or webhook events. SublimePDF's REST API integrates into any tech stack (Node.js, Python, Ruby, Go, PHP) and generates PDFs from HTML templates, Markdown, or raw URLs.
Follow the step-by-step instructions below, then use the free tool directly — no registration or download required.
Open Tool →How to Automate PDF Generation — Step by Step
Get your API key
Sign up at SublimePDF and generate an API key from the dashboard. Store the key securely in environment variables (SUBLIMEPDF_API_KEY) — never hardcode it in source code or commit it to version control.
Choose your generation method
SublimePDF offers three approaches: HTML-to-PDF (POST /api/v1/html-to-pdf with raw HTML), URL-to-PDF (POST /api/v1/url-to-pdf with a public URL), or Template rendering (POST /api/v1/render with a template ID and JSON data). Pick the one that fits your workflow.
Integrate the API into your backend
Make HTTP POST requests from your server-side code. Use your language's HTTP client — fetch/axios in Node.js, requests in Python, net/http in Go. Set the Authorization header to 'Bearer YOUR_API_KEY' and Content-Type to 'application/json'.
Handle the response
Synchronous requests return the PDF binary directly (Content-Type: application/pdf). Save it to disk, upload to S3, or stream it to the user. For large or slow-rendering documents, use async mode to receive a webhook callback when the PDF is ready.
Add to your application workflow
Trigger PDF generation at the right moment — after an order is placed (invoice), at the end of a billing cycle (statement), when a course is completed (certificate), or when a user clicks 'Download Report.' Wire the API call into your existing business logic.
Pro Tips
- 💡 Use async generation with webhooks for PDFs that take longer than 10 seconds to render — this prevents HTTP timeouts and lets your server handle other requests in the meantime.
- 💡 Cache generated PDFs by storing them in S3 or a CDN with the source data hash as the key — if the data hasn't changed, serve the cached PDF instead of regenerating it.
- 💡 Set up a retry mechanism with exponential backoff for API calls — transient network errors or rate limits shouldn't cause your automation to fail permanently.
- 💡 Log the request ID returned in the X-Request-Id header with every API call — SublimePDF support can use this to diagnose issues quickly.
Privacy & Security
All processing happens directly in your browser. Your files are never uploaded to any server — they remain on your device throughout the entire process. SublimePDF uses WebAssembly technology for fast, secure, client-side processing.
Works Everywhere
This tool works on any modern browser — Chrome, Firefox, Safari, or Edge — on desktop, tablet, or mobile. No software to install. PDF is an open ISO standard supported by all major platforms.
How to Automate PDF Generation — FAQ
Which programming languages are supported?
How fast is PDF generation?
Can I generate PDFs from private/authenticated pages?
Is there a sandbox environment for testing?
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Webhooks let SublimePDF push notifications to your server when asynchronous events complete — a PDF finishes rendering, a batch job completes, or a conversion fails. Instead of polling the API for status, your application receives an HTTP POST callback the moment results are ready, enabling real-time workflows and reducing unnecessary API calls.