15 BEST Website Crawler Tools in 2021 [Free & Paid] – Guru99
A web crawler is an internet bot that browses WWW (World Wide Web). It is sometimes called as spiderbot or spider. The main purpose of it is to index web pages.
Web crawlers enable you to boost your SEO ranking visibility as well as conversions. It can find broken links, duplicate content, missing page titles, and recognize major problems involved in SEO. There is a vast range of web crawler tools that are designed to effectively crawl data from any website URLs. These apps help you to improve website structure to make it understandable by search engines and improve rankings.
Following is a handpicked list of Top Web Crawler with their popular features and website links to download web crawler apps. The list contains both open source(free) and commercial(paid) software.
Best Web Crawler Tools & Software
Visualping is a website monitoring tool that crawls the web for changes. Use Visualping in your SEO strategy to monitor changes on SERPs, competitor landing pages and Google algorithm updates.
You can automatically monitor parts of a webpage or entire pages in bulk.
Track your competitors and clients keyword edits on title, meta, H1 and other tags.
Receive notifications via email, Slack, Teams or Discord.
Monitor visual, text and code changes.
Provide complete SEO reports and change audits to your clients.
Use other SEO tools to collect data and Visualping to alert you of the changes.
Semrush is a website crawler tool that analyzed pages & structure of your website in order to identify technical SEO issues. Fixing these issues helps to improve your search performance. Apart from this service, it also offers tools for SEO, market research, SMM and advertising.
It will test for Metadata, HTTP/HTTPS, Directives, Status codes, Duplicate content, Page response time, Internal linking, Image sizes, Structured data, Site structure, etc
Provides easy to use interface
It helps you to analyze log file.
This application has a dashboard that enables you to view website issues with ease.
Enables you to audit your website without any hassle.
is a website SEO checker that helps you to improve SEO ratings. It provides on-page SEO audit report that can be sent to clients.
This web crawler tool can scan internal and external links on your website.
It helps you to test the speed of your site.
You can visualize the structure of a web page with ease.
also allows you to check indexing issues on landings pages.
It enables you to prevent hackers from attack.
ContentKing is an app that enables you to perform real-time SEO monitoring and auditing. This application can be used without installing any software.
It helps you to structure your site with segments.
You can monitor your website changes.
It offers various APIs like Google Search Console and Analytics.
It provides a user-friendly dashboard.
It helps you to collaborate with your clients or colleagues.
Link-Assistant is a website crawler tool that provides website analysis and optimization facilities. It helps you to make your site works seamlessly. This application enables you to find out the most visited pages of your website.
Provides site optimization reports that help you to boost your business productivity.
You can customize this tool according to your desire.
Easy to configure your site settings.
Helps you to make your website search engine friendly.
It can optimize a site in any language.
Hexometer is a web crawling tool that can monitor your website performance. It enables you to share tasks and issues with your team members.
It can check the security problems of your website.
Offers intuitive dashboard.
This application can perform white label SEO.
Hexometer can optimize for SERP (Search Engine Results Page).
This software can be integrated with Telegram, Slack, Chrome, Gmail, etc.
It helps you to keep track of your website changes.
7) Screaming Frog
Screaming Frog is a website crawler that enables you to crawl the URLs. It is one of the best web crawler which helps you to analyze and audit technical and onsite SEO. You can use this tool to crawl upto 500 URLs for free.
It instantly finds broken links and server errors.
This free web crawler tool helps you to analyze page titles and metadata.
You can update and collect data from a web page using XPath (XML Path Language).
Screaming Frog helps you to find duplicate content.
You can generate XML Sitemaps (a list of your website’s URLs).
This list website crawler allows you to integrate with Google Analytics, GSC (Google Search Console) & PSI (PageSpeed Insights).
DeepCrawl is a cloud-based tool that helps you to read and crawl your website content. It enables you to understand and monitor the technical issues of the website to improve SEO performance.
It supports multi-domain monitoring.
This online web crawler provides customized dashboards.
This website crawler tool helps you to index and discover your web pages.
Deepcrawl enables you to increase the loading speed of your website.
This app provides a ranking, traffic, and summary data to view the performance of the website.
9) WildShark SEO Spider Tool
WildShark SEO Spider Tool is a URL crawling app that helps you to identify pages with duplicate description tags. You can use it to find missing duplicate titles.
Highlight missing H3 tags, title tags, and ALT tags.
It helps you to improve on-page SEO performance.
You can optimize your web page titles and descriptions.
WildShark SEO Spider tool enables you to boost website conversion rates.
This tool also looks for missing alt tags.
Scraper is a chrome extension that helps you to perform online research and get data into CSV file quickly. This tool enables you to copy data to the clipboard as a tab-separated value.
It can fix the issue with spreadsheet titles ending.
This website crawler tool can capture rows containing TDs (Tabular Data Stream).
Scraper is easy to use tool for the people who are comfortable with XPath query language.
11) Visual SEO Studio
Visual SEO Studio is a web crawling tool that crawls exactly like a search spider. It provides a suite to inspect your website quickly.
It helps you to audit a backlink profile.
Visual SEO Studio can audit XML Sitemaps by web content.
is a tool that helps you to capture data from the search engine and e-commerce website. It provides flexible web data collection features.
Allows you to customize according to your business needs.
This web crawler software can effectively handle all captchas.
This tool can fetch data from complex sites.
is easy to scale without managing IPS (Intrusion Prevention System).
80legs is a crawling web service that enables you to create and run web crawls through SaaS. It is one of the best Free online Web Crawler tools which consists of numerous server that allows you to access the site from different IP addresses.
It helps you to design and run custom web crawls.
This tool enables you to monitor trends online.
You can build your own templates.
Automatically control the crawling speed according to website traffic.
80legs enables you to download results to the local environment or computer.
You can crawl the website just by entering a URL.
14) Dyno Mapper
DYNO Mapper is a web-based crawling software. It helps you to create an interactive visual site map that displays the hierarchy.
This online Website Crawler tool can track the website from tablets, mobile devices, and desktop.
This web crawler software helps you to understand the weakness of your website or application.
Dyno Mapper enables you to crawl private pages of password-protected websites.
You can track keyword results for local and international keyword rankings.
It enables developers to develop search engine friendly websites.
Oncrawl is a simple app that analyzes your website and finds all the factors that block the indexation of your web pages. It helps you to find SEO issues in less amount of time.
You can import HTML, content, and architecture to crawl pages of your website.
This online web crawler can detect duplicate content on any website.
This tool can handle, a file that tells search engines which pages on your site to crawl.
You can choose two crawls to compare and measures the effect of new policies on your website.
It can monitor website performance.
Cocoscan is a software product that analyzes your website and finds the factor that blocks the indexation of your web pages. This crawler tool can find the primary SEO related issues in less time.
It can identify important keyword density.
Cocoscan can check for duplicate written content in any website.
This web crawler app can analyze your website and make your website searchable by a search engine.
This lists crawler app provides you a list of pages with issues that could affect your website.
You can increase Google ranking effortlessly.
This web crawler online offers real time visual image of a responsive website.
HTTrack is an open-source web crawler that allows users to download websites from the internet to a local system. It is one of the best web spidering tools that helps you to build a structure of your website.
This site crawler tool uses web crawlers to download website.
This program provides two versions command line and GUI.
Webharvy is a website crawling tool that helps you to extract HTML, images, text, and URLs from the site. It automatically finds patterns of data occurring in a web page.
This free website crawler can handle form submission, login, etc.
You can extract data from more than one page, keywords, and categories.
Webharvy has built-in VPN (Virtual Private Network) support.
It can detect the pattern of data in web pages.
You can save extracted data in numerous formats.
Crawling multiple pages is possible.
❓ What is a Web Crawler?
A Web Crawler is an Internet bot that browses through WWW (World Wide Web), downloads and indexes content. It is widely used to learn each webpage on the web to retrieve information. It is sometimes called a spider bot or spider. The main purpose of it is to index web pages.
❗ What is a Web Crawler used for?
A Web crawler is used to boost SEO ranking, visibility as well as conversions. It is also used to find broken links, duplicate content, missing page titles, and recognize major problems involved in SEO. Web crawler tools are designed to effectively crawl data from any website URLs. These apps help you to improve website structure to make it understandable by search engines and improve rankings.
Which are the best Website Crawler tools?
Following are some of the best website crawler tools:
How to choose the best Website Crawler?
You should consider the following factors while choosing the best website crawler:
Easy to use User Interface
A web crawler must detect file and sitemap easily
It should find broken pages and links with ease
It must identify redirect issues, and HTTP/ HTTPS issues
A web crawler should be able to connect with Google Analytics with ease
It must detect mobile elements
It should support multiple file formats
A web crawler must support multiple devices
What is Web Crawling? How it works in 2021 & Examples – Research
Have you ever wondered how search engines such as Google and Bing collect all the data they present in their search results? It is because search engines index all the pages in their archives so that they can return the most relevant results based on queries. Web crawlers enable search engines to handle this process.
This article highlights important aspects of what crawling is, why it matters, how it works, applications & examples.
What is web crawling?
Web crawling is the process of indexing data on web pages by using a program or automated script. These automated scripts or programs are known by multiple names, including web crawler, spider, spider bot, and often shortened to crawler.
Web crawlers copy pages for processing by a search engine, which indexes the downloaded pages so that users can search more efficiently. The goal of a crawler is to learn what webpages are about. This enables users to retrieve any information on one or more pages when it’s needed.
Why is web crawling important?
Thanks to digital revolution, the total amount of data on the web has increased. In 2013, IBM stated that 90% of the world’s data had been created in the previous 2 years alone, and we continue to double the rate of data production every 2 years. Yet, almost 90% of data is unstructured, and web crawling is crucial to index all these unstructured data for search engines to provide relevant results.
According to Google data, interest in the web crawler topic has decreased since 2004. Yet, at the same time period, interest in web scraping has outpaced the interest in web crawling. Various interpretations can be made, some are:
Increasing interest in analytics and data-driven decision making are the main drivers for companies to invest in scraping.
Crawling done by search engines is no longer a topic of increasing interest since they have done this since the early 2000s
Search engine industry is a mature industry dominated by Google and Baidu, so few companies need to build crawlers.
How does a web crawler work?
Web crawlers start their crawling process by downloading the website’s file. The file includes sitemaps that list the URLs that the search engine can crawl. Once web crawlers start crawling a page, they discover new pages via links. These crawlers add newly discovered URLs to the crawl queue so that they can be crawled later. Thanks to these techniques, web crawlers can index every single page that is connected to others.
Since pages change regularly, it is also important to identify how frequently search engines should crawl them. Search engine crawlers use several algorithms to decide factors such as how often an existing page should be re-crawled and how many pages on a site should be indexed.
What are web crawling applications?
Web crawling is commonly used to index pages for search engines. This enables search engines to provide relevant results for queries. Web crawling is also used to describe web scraping, pulling structured data from web pages, and web scraping has numerous applications.
What are the examples of web crawling?
All search engines need to have crawlers, some examples are:
Amazonbot is an Amazon web crawler for web content identification and backlink discovery.
Baiduspider for Baidu
Bingbot for Bing search engine by Microsoft
DuckDuckBot for DuckDuckGo
Exabot for French search engine Exalead
Googlebot for Google
Yahoo! Slurp for Yahoo
Yandex Bot for Yandex
In addition to these, vendors like Bright Data enable companies to set up and scale web crawling operations rapidly with a SaaS model.
If you have questions about web crawling vendors, feel free to check out our sortable, updated, and transparent vendor list or contact us:
Let us find the right vendor for your business
Cem founded AIMultiple in 2017. Throughout his career, he served as a tech consultant, tech buyer and tech entrepreneur. He advised enterprises on their technology decisions at McKinsey & Company and Altman Solon for more than a decade. During his secondment, he led the technology strategy of a regional telco while reporting to the CEO. He has also led commercial growth of AI companies that reached from 0 to 7 figure revenues within months. Cem regularly speaks at international conferences on artificial intelligence and machine learning. He graduated from Bogazici University as a computer engineer and holds an MBA from Columbia Business School.
Is web crawling legal? – Towards Data Science
Photo by Sebastian Pichler on UnsplashWeb crawling, also known as web scraping, data scraping or spider, is a computer program technique used to scrape a huge amount of data from websites where regular-format data can be extracted and processed into easy-to-read structured crawling basically is how the internet functions. For example, SEO needs to create sitemaps and gives their permissions to let Google crawl their sites in order to make higher ranks in the search results. Many consultant companies would hire companies to specialize in web scraping to enrich their database so as to provide professional service to their is really hard to determine the legality of web scraping in the era of the digitized crawling can be used in the malicious purpose for example:Scraping private or classified information. Disregard of the website’s terms and service, scrape without owners’ abusive manner of data requests would lead web server crashes under additionally heavy is important to note that a responsible data service provider would refuse your request if:The data is private which would need a username and passcodesThe TOS (Terms of Service) explicitly prohibits the action of web scrapingThe data is copyrightedViolation of the Computer Fraud and Abuse Act (CFAA). Violation of the Digital Millennium Copyright Act (DMCA)Trespass to “just scraped a website” may cause unexpected consequences if you used it probably heard of the HiQ vs Linkedin case in 2017. HiQ is a data science company that provides scraped data to corporate HR departments. Linkedin then sent desist letter to stop HiQ scraping behavior. HiQ then filed a lawsuit to stop Linkedin from blocking their access. As a result, the court ruled in favor of HiQ. It is because that HiQ scrapes data from the public profiles on Linkedin without logging in. That said, it is perfectly legal to scrape the data which is publicly shared on the ’s take another example to illustrate in what case web scraping can be harmful. The law case eBay v. Bidder’s Edge. If you’re doing web crawling for your own purposes, it is legal as it falls under fair use doctrine. The complications start if you want to use scraped data for others, especially commercial purposes. Quoted from, 100 1058 (N. D. Cal. 2000), was a leading case applying the trespass to chattels doctrine to online activities. In 2000, eBay, an online auction company, successfully used the ‘trespass to chattels’ theory to obtain a preliminary injunction preventing Bidder’s Edge, an auction data aggregation, from using a ‘crawler’ to gather data from eBay’s website. The opinion was a leading case applying ‘trespass to chattels’ to online activities, although its analysis has been criticized in more recent long as you are not crawling at a disruptive rate and the source is public you should be fine. I suggest you check the websites you plan to crawl for any Terms of Service clauses related to scraping their intellectual property. If it says “no scraping or crawling”, you should respect ggestion:Scrape discreetly, check “” before you start scrapingGo conservative. Aggressively asking for data can burden the internet server. An ethical way is to be gentle. No one wants to crash the the data wisely. Don’t duplicate the data. You can generate insight from collected data, and help Your business out to the owner of the website before you start ’t randomly pass scraped data to anyone. If it is valuable data, keep it secure.
Frequently Asked Questions about web crawler app
What is web crawler app?
What are web crawling applications? Web crawling is commonly used to index pages for search engines. This enables search engines to provide relevant results for queries. Web crawling is also used to describe web scraping, pulling structured data from web pages, and web scraping has numerous applications.Dec 15, 2020
Is web crawling legal in US?
If you’re doing web crawling for your own purposes, it is legal as it falls under fair use doctrine. The complications start if you want to use scraped data for others, especially commercial purposes. … As long as you are not crawling at a disruptive rate and the source is public you should be fine.Jul 17, 2019
How do I crawl a website?
The six steps to crawling a website include:Understanding the domain structure.Configuring the URL sources.Running a test crawl.Adding crawl restrictions.Testing your changes.Running your crawl.