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Insights for developers

Tutorials, guides, and best practices for screenshot APIs, web automation, and building better developer tools.

Tutorials

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.

Mar 8, 2026 9 min read
Comparisons

Screenshot API Pricing Compared: The Real Cost at Every Scale

A deep pricing comparison of screenshot APIs at every scale — 100 to 500K screenshots per month. Includes cost analysis for len.sh, ScreenshotOne, Urlbox, and self-hosted Puppeteer.

Mar 6, 2026 9 min read
Comparisons

Best Screenshot API in 2026: An Honest Comparison

We compare five popular screenshot APIs — len.sh, ScreenshotOne, Urlbox, Screenshotapi.net, and APIFlash — on features, DX, pricing, and performance to help you pick the right one.

Mar 6, 2026 8 min read
Comparisons

ScreenshotOne Alternative: Why Developers Are Switching to len.sh

A direct comparison of len.sh and ScreenshotOne covering API design, pricing, features, and developer experience. See code examples showing how to migrate.

Mar 6, 2026 7 min read
Use Cases

Screenshot API for AI Agents: Give Your LLM Eyes

How to integrate a screenshot API with AI agents and LLMs. Use len.sh to give autonomous agents the ability to see and interact with web pages.

Mar 6, 2026 8 min read
Tutorials

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.

Mar 6, 2026 8 min read
Tutorials

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.

Mar 6, 2026 8 min read
Tutorials

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.

Mar 6, 2026 8 min read
Comparisons

Urlbox Alternative: Simpler Pricing, No Feature Gating

Compare len.sh and Urlbox side by side. See how len.sh delivers the same core screenshot features at a fraction of the cost with no feature gating across plans.

Mar 6, 2026 7 min read
Use Cases

5 Ways to Use Screenshot APIs in Your Application

Discover five practical ways to integrate screenshot APIs into your applications, from generating OG images to building visual regression testing pipelines.

Mar 1, 2026 9 min read
Comparisons

len.sh vs Puppeteer: Which Should You Choose?

A detailed comparison of len.sh's screenshot API and Puppeteer for capturing website screenshots. Compare setup, features, scaling, and costs.

Feb 22, 2026 8 min read
Tutorials

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.

Feb 15, 2026 8 min read

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