Encoding issues are the number one source of corrupted scraped data, producing everything from replacement characters to garbled text. You fetch a page, parse the HTML, and everything looks fine – ...
You are scraping a page or reading a file, and the output is peppered with diamonds: �. Or maybe your logs print a warning like “some characters could not be decoded, and were replaced with replace...
Some web forms accept images or files through clipboard paste events or data URI inputs rather than traditional file upload dialogs. This is common in rich text editors, image annotation tools, and...
Web forms come in many shapes, and each type requires a different automation strategy. For a broader overview of form automation techniques, see our complete guide to automating web form filling. A...
Understanding how form submission works under the hood is essential for anyone who wants to automate it. When you click a submit button on a web page, a chain of events fires off – the browser coll...
The robots.txt protocol has been the de facto standard for communicating with web crawlers since 1994. For over thirty years, this simple text file has served as the handshake between websites and ...
Before you pick a scraping tool, sign up for a data extraction service, or assign your team to build something custom, stop and ask yourself a set of questions. The answers will narrow the field fr...
A web scraper is just a program that does what your browser does – but automatically and at scale. When you visit a website, your browser sends a request, receives HTML, renders it visually, and di...
The web is not a single flat layer of pages waiting to be scraped. It is more like a series of concentric rings, each with different access requirements, different levels of structure, and differen...
A web crawler is a program that systematically visits web pages and follows links to discover new ones – like a spider traversing its web. Every search engine you have ever used depends on crawlers...