Web scraping is the automated collection of data from web pages into a structured format such as a spreadsheet, CSV file or JSON. Instead of copying and pasting by hand, a program reads the page, picks out the fields you want and saves them in rows and columns.
How web scraping works
- Request the page. The scraper loads a web page the way a browser does.
- Read the content. It parses the page’s HTML to find the elements that hold the data.
- Extract the fields. It collects items such as product names, prices or company names.
- Clean and store. The data is formatted, de-duplicated and saved to Excel, CSV, JSON or a database.
Common tools and methods
- Python libraries: Requests and BeautifulSoup for simple pages, and Selenium for pages that load content with JavaScript.
- Browser-based extensions: useful for small, one-off jobs.
- Official APIs: many platforms offer a way to get data directly and with permission. Use it when it exists.
- Manual research: still the right choice for small lists or sources that do not allow automated collection.
What businesses use web scraping for
- Collecting product details and prices from online stores.
- Gathering public business directory data for prospect research.
- Tracking competitor catalogues and listings.
- Replacing large copy-and-paste jobs with an automated process.
- Keeping a spreadsheet updated on a schedule.
Web scraping and B2B lead generation
Scraped data is raw. Before it is useful for sales it needs to be matched to your ideal customer profile, checked for accuracy and verified. At Lead Nexra we combine automated collection with manual searching and a manual check, then validate emails with a paid tool. You can read more in how to find B2B leads and our email list cleaning guide.
Is web scraping legal?
It depends on what data you collect, how you collect it and which terms apply. Public, non-personal data is treated differently from personal data or content behind a login. Some websites forbid automated collection in their terms of use, and privacy laws such as GDPR can apply when personal data is involved. A responsible scraper checks the site’s terms and robots.txt, does not bypass logins or security measures, and keeps request rates low. This is general information, not legal advice. Talk to a lawyer if you have specific concerns.
Should you build it yourself or hire someone?
A one-time, small job may be easy to do yourself. Hire a specialist when you need large volumes, regular updates, a complicated site or clean, ready-to-use files. Prepare the target sites, the exact fields you need and your preferred output format.