How to Capture Full Page Screenshots with an API
Learn how to capture full page screenshots of any website using the len.sh API. Covers scrolling pages, lazy-loaded content, fixed headers, and device emulation with code examples.
HTML to PDF API: Convert Templates to Professional PDFs
Generate PDFs from HTML templates using the len.sh API. Covers invoices, reports, certificates, and dynamic documents with custom headers, footers, and styling.
Building a Website Monitoring Tool with len.sh
Build a complete website monitoring tool with Node.js that captures periodic screenshots, detects visual changes, and sends Slack alerts.
URL to PDF API: The Complete Developer Guide
A comprehensive guide to converting URLs and HTML to PDFs using the len.sh /v1/pdf endpoint. Covers paper sizes, margins, page ranges, headers, footers, and real-world use cases.
How to Generate OG Images Programmatically in 2026
Learn how to generate dynamic Open Graph images for social sharing using the len.sh /v1/og endpoint. Covers all parameters, HTML meta tags, and framework integration.
Signed URLs: Embed Screenshots in Emails Without Exposing API Keys
Learn how to use len.sh signed URLs to safely embed live screenshots in emails, public dashboards, and img tags using HMAC-SHA256 authentication.
Screenshot APIs Explained: A Developer's Guide
Learn what screenshot APIs are, how they work under the hood, and how to capture your first website screenshot with len.sh in under 5 minutes.
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