Tutorials
Everything tagged Tutorials.
67 articles
Topic Tutorials
Tutorial
How to Use NoneCap With Residential Proxies to Solve hCaptcha
NoneCap solves hCaptcha through a proxy you pass with each solve. Give it a sticky residential line, submit the token from that same line within about two minutes, and enterprise sitekeys accept it.
October 22, 2026 · 8 min read
Tutorial
Best language for web scraping: Python, JavaScript, Go and the rest
We ran the same scraper in Python, JavaScript, Go and Java on our server: speed, memory, lines of code, broken HTML, timeouts and proxies, measured.
October 12, 2026 · 15 min read
Tutorial
Best web scraping tools: what each does well and where it gets blocked
The scraping tools you can run yourself, sorted by job, with what our tests measured, and what 16 tool settings got back from eight sites behind bot defenses.
October 12, 2026 · 7 min read
Tutorial
C# web scraping: HttpClient, HtmlAgilityPack, AngleSharp and Playwright, tested
How to scrape websites in C#: HttpClient with HtmlAgilityPack or AngleSharp, Parallel.ForEachAsync for many pages, and Playwright for JavaScript, tested on .NET 10.
October 12, 2026 · 13 min read
Tutorial
Golang web scraping: net/http, goquery, Colly and chromedp, tested
How to scrape websites in Go: net/http and goquery for pages, Colly for whole sites, chromedp for JavaScript, and the defaults we measured on Go 1.27.2.
October 12, 2026 · 15 min read
Tutorial
Java web scraping: jsoup, HttpClient and HtmlUnit, tested
How to scrape websites in Java: jsoup for pages, virtual threads for many pages, HtmlUnit for JavaScript, and the defaults we measured on Java 25.
October 12, 2026 · 12 min read
Tutorial
JavaScript web scraping: fetch, Cheerio and Puppeteer in Node.js
How to scrape with JavaScript in Node.js, tested: fetch and Cheerio for HTML, Puppeteer for script-built pages, garbled text, timeouts and proxies.
October 12, 2026 · 8 min read
Tutorial
Open source web scrapers: what each project is good for
Which open-source web scraper fits which job: 18 projects with their licenses and releases, and 7 crawlers run with their defaults on a test site of our own.
October 12, 2026 · 12 min read
Tutorial
pandas read_html: scrape HTML tables into DataFrames
How to read HTML tables into pandas DataFrames with read_html, tested on pandas 3.0: picking a table, numbers, links, headers, and the errors you will meet.
October 12, 2026 · 6 min read
Tutorial
Parse HTML with regex: when it works and when to use a parser
Can you parse HTML with regex? We ran four regular expressions and two parsers on 13 small HTML inputs and checked every answer against Chrome's own parser.
October 12, 2026 · 7 min read
Tutorial
Parse JSON in Python: json.loads, files and API responses
How to parse JSON in Python, tested: strings, files and API answers, the 'Expecting value' error, NaN and big numbers in other languages, dates and orjson.
October 12, 2026 · 5 min read
Tutorial
Parse XML in Python: ElementTree, lxml and sitemaps
How to parse XML in Python, tested on our own sitemaps: the namespace trap that empties findall(), large files with iterparse, five parsers timed, and safety.
October 12, 2026 · 6 min read
Tutorial
PDF scraping: extract tables and text from PDFs with Python
PDF scraping in Python, tested on a 28-page IRS tax table: which library keeps rows in order, why the table finders failed, what fixed it, and scanned pages.
October 12, 2026 · 5 min read
Tutorial
PHP web scraping: cURL, Guzzle, the DOM parsers and chrome-php, tested
How to scrape websites with PHP: the cURL extension and PHP 8.4's HTML5 parser for pages, Guzzle for many pages, chrome-php for JavaScript, tested on PHP 8.5.
October 12, 2026 · 15 min read
Tutorial
Playwright wait for page load: load states, selectors and network idle
Which Playwright wait to use when a page loads its content with JavaScript: load states, networkidle, locator waits and responses, each timed on test pages of our own.
October 12, 2026 · 8 min read
Tutorial
Python HTTP clients compared: requests, httpx, aiohttp and urllib3
Six Python HTTP clients tested on one server: what each one sends, which follow redirects, which give up on a silent server, how fast they are, and what they install.
October 12, 2026 · 10 min read
Tutorial
Python requests headers: set, read and rotate them
What Python requests really sends as headers, tested on our own server: the five defaults, Sessions, tokens on redirects, rotation, br, and what a proxy sees.
October 12, 2026 · 5 min read
Tutorial
Python requests POST: form data, JSON and files
How to send form data, JSON and files with requests.post, tested against our own server: four calls that send something else, redirects, sessions and proxies.
October 12, 2026 · 5 min read
Tutorial
Python requests retry: retries, backoff and when to switch proxy
How to retry failed requests in Python, timed at our own server: no retries by default, the real backoff waits, Retry-After, POST, timeouts and proxy switching.
October 12, 2026 · 5 min read
Tutorial
Python web scraping libraries compared: what each one is for
The Python web scraping libraries that matter, tested on one job: requests and httpx, BeautifulSoup, lxml, parsel, selectolax, Scrapy, Playwright and Selenium.
October 12, 2026 · 11 min read
Tutorial
Ruby web scraping: HTTParty, Nokogiri and Ferrum, tested
How to scrape websites with Ruby: HTTParty and Nokogiri for pages, threads for many pages, Ferrum for JavaScript, and the defaults we measured on Ruby 4.0.
October 12, 2026 · 14 min read
Tutorial
Selenium find element: locators, waits and the errors you will meet
How to find elements in Selenium with Python, tested on Chrome: the eight locators, find_element or find_elements, waits in seconds, and each error explained.
October 12, 2026 · 14 min read
Tutorial
Selenium headless mode: run Chrome headless, and what sites can detect
How to run Chrome headless in Selenium with Python, tested: which flag works now, the small default window, what a site can see, and how to fix each part.
October 12, 2026 · 10 min read
Tutorial
Web scraping with BeautifulSoup: parse HTML in Python, with examples
How to scrape with BeautifulSoup, tested: find and select, three parsers against Chrome, the tbody trap, r.content over r.text, and what makes it fast.
October 12, 2026 · 12 min read
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