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Guides to web scraping.
Practical, vendor-neutral explanations of how web data extraction works — the techniques, the trade-offs, and the law.
What Is Web Scraping? A Practical Guide
Web scraping is the automated extraction of data from websites. Learn how it works, what HTML scraping is, what scraping is used for, the difference between scraping and crawling, and when to use an API instead.
How to Scrape and Crawl JavaScript-Rendered Websites (2026)
JavaScript-heavy sites return empty HTML to naive scrapers. Compare hidden API endpoints, embedded state, headless browsers (Playwright, Puppeteer, Selenium, Scrapy), and managed scraping APIs for extracting data from dynamic pages.
Is Web Scraping Legal? What the Law Actually Says (2026)
Web scraping of public data is generally lawful in the US, EU and UK, but terms of service, copyright, database rights and privacy law draw real boundaries. The leading cases, plus links to country-specific guides.
Puppeteer vs. Selenium vs. Scraping API
Three ways to extract data from modern websites compared: Puppeteer's speed, Selenium's cross-browser reach, and managed scraping APIs — with a decision table for picking one.
Web Scraping Best Practices: 12 Rules for Reliable, Respectful Scrapers
Rate limiting, robots.txt, caching, retries, selector strategy, monitoring, and legal hygiene. The practices that separate a scraper that runs for a year from one that breaks in a week.
Advanced Web Scraping Techniques: Fingerprints, Proxies, CAPTCHAs, and Hidden APIs
Beyond requests and BeautifulSoup: TLS and browser fingerprinting, proxy rotation strategy, CAPTCHA handling, hidden API discovery, and distributed crawling for sites that actively resist scrapers.
JavaScript Rendering API: How It Works and When You Need One
What JavaScript rendering is, how a rendering API executes a page's scripts server-side and returns the final HTML or extracted data, the request parameters that matter, cost, and how it compares to running Puppeteer yourself.
Ecommerce Price Scraping: How to Extract Product Prices at Scale
A technical guide to scraping prices from ecommerce sites: locating price data in HTML and JSON, handling variants and currencies, dealing with anti-bot protection, scheduling, and storing price history.
Build vs. Buy: The Real Cost of In-House Web Scraping
An in-house scraper looks cheap until proxies, anti-bot arms races, and maintenance land. A cost breakdown and decision checklist for build vs. buy in web data extraction.
Is web scraping legal? Country-by-country guides
Statutes, leading cases, and a practical checklist for each jurisdiction. Start with the global overview, then read the guide for the country whose sites you scrape.