Unit Testing AI Agents in the Browser
Build browser-agent tests that produce useful evidence: deterministic Playwright checks for critical flows, controlled agent exploration, and artifacts that make failures diagnosable.
Blog
Guides for capturing the web
How to take clean screenshots, turn HTML into images and PDFs, run headless browsers, and give AI agents eyes. Written by the team that builds ScreenshotNeo.
How to Add a Watermark to a Screenshot With JavaScript
Add text to an existing screenshot or capture a page element, watermark it on a canvas, and export a downloadable image with JavaScript.
How to Build Optimized Web Scraping Actors in Go
Build a concurrent, resource-bounded Go scraping worker with reusable HTTP connections, measured tuning, profiling, and practical troubleshooting.
Creating a GIF Maker: How to Add Text to GIFs with FFmpeg
Build a GIF caption workflow with FFmpeg drawtext, palette generation, and palette use. Learn how to handle fonts, placement, transparency, looping, and common errors.
How to Scrape Job Postings with an AI Job Board Scraper
Build a job-posting pipeline that starts with permission, parses predictable fields with rules, and uses AI only for supported extraction.
How to Use User Agents for Web Scraping
Learn how to choose a truthful User-Agent, configure it in Python and other clients, follow robots.txt, and troubleshoot blocks without pretending to be a browser.
How to Scrape Amazon PPC Ad Data: Sponsored Products and Placements
Learn the compliant way to collect Amazon Sponsored Products search-term, campaign, and placement data using reports, the Ads API, or browser automation.
How to Add Custom Headers to Website Screenshot Requests
Pass Authorization, API key, and other custom headers to the page a screenshot browser loads. Learn the GET and POST patterns, secure credentials, and fix common failures.
How to Add CSS from a String When Converting HTML to PDF
Inject runtime CSS into HTML before PDF capture with Playwright, Puppeteer, or WeasyPrint. Fix print media, fonts, pagination, assets, and security issues.
How to Add CSS from a String When Converting HTML to PDF in Java
Inject a Java CSS String into HTML, convert it to PDF with iText, resolve assets, troubleshoot ignored styles, and compare a hosted screenshot option.
How AI Agents Can Generate PDFs with Automation Tools
Build a safe agent workflow for generating PDFs: tool design, HTML rendering, Puppeteer and Playwright code, security, troubleshooting, and ScreenshotNeo.
How to Add Custom Toolbar Buttons to an Embedded Editor
Add custom toolbar buttons to TinyMCE, CKEditor 5, or CKEditor 4 with the right extension API, lifecycle, accessibility, and troubleshooting steps.
How to Verify AI Agents in Browser Automation
A practical framework for proving browser agents completed tasks safely, with Playwright checks, evidence bundles, benchmarks, and red-team tests.
How to Add Custom Headers or Footers to PDFs in C#
Add reusable headers, footers, page numbers, first-page variants, and overlays to C# PDFs with Syncfusion, QuestPDF, and iText guidance.
How to Add Inline JavaScript When Converting HTML to PDF with PHP
Learn why PHP PDF libraries ignore inline JavaScript, how to prepare dynamic HTML, and when to use a browser-backed renderer or ScreenshotNeo.
How to Scrape JavaScript-Rendered Tables Across Pages
Use Playwright to wait for rendered rows, extract each page safely, paginate, validate results, and avoid common JavaScript scraping failures.
Generating Video, PDFs, and Images with the Browser Agents MCP Server
Use Browserless MCP to capture webpages as images or PDFs and record browser sessions as WebM, with setup steps, runnable examples, and troubleshooting.
How to Scale Web Scraping with Actor Factories
Scale scraping with Apify Actor factories by batching work, sharing durable storage, and coordinating child runs with retries, rate limits, and cost controls.