freetechbooks.com
🖥 Status: error
🕒 Response Time: 0.641 sec
⬅️ Response Code: 501
The number of uptime checks of freetechbooks.com performed over the past 632 days, starting November 20, 2024, stands at 54. Freetechbooks.com returned a code 200 during its most recent uptime on April 29, 2026, and was accessible 48 times during all tests. Freetechbooks.com was offline for 5 out of every assessment that was done, or 9.26% of the total, with the most recent assessment occurring on July 4, 2026. Among the 1 error-containing responses, the most current error, coded as 501, was detected on August 10, 2026. The response received from freetechbooks.com was 0.641 seconds on August 10, 2026, against an 0.704 seconds average.
54
Last Updated: August 10, 2026
Freetechbooks overview
- Domain
- freetechbooks.com
- Title
- Database of Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes
- Description
- This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available.
- R Site Status Rank
- 60 210
- Search Wikipedia
- freetechbooks.com
- Alternatives
- alternatives to freetechbooks.com
- Recently checked
- chugin.co.jp
Freetechbooks.com
status check request map as of August 15, 2026
Country report for freetechbooks.com as of August 15, 2026
| Iran | 100.00% | ||||||||
| 20:17 | |||||||||
| Site | Total Checks | Last Modified |
|---|---|---|
| 21 | December 4, 2021 | |
| 15 | January 19, 2025 | |
| 54 | November 20, 2024 | |
| 11 | January 9, 2025 | |
| 14 | October 27, 2024 |
Furunavi.jp | Freetechbooks.com | ||||
|---|---|---|---|---|---|
General SEO Report
| Page Title | Page Title tips for freetechbooks.com: Going beyond the 60-character website title length might be unavoidable for highly descriptive real estate terms, events, or unique product identifiers, requiring justification to sacrifice brevity for necessary detail during site migration planning or based on market research data, and importantly, accurately reflect the topic addressed on the page to build longstanding trust signals with search engines monitoring page authority metrics. |
|---|---|
| Database of Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes Length: 92 characters | |
| Meta Description | Meta Description tips for freetechbooks.com: Test different meta descriptions for similar pages with proven tracking to see which versions achieve the best CTR and conversion results, refining your approach based on data rather than relying solely on assumptions about user behavior. |
| This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available. Length: 156 characters | |
| Meta Keywords | Meta Keywords tips for freetechbooks.com: The fundamental issue with meta keywords stems from their historical abuse by web developers attempting to manipulate search rankings through irrelevant keyword lists, leading to algorithmic penalties and causing major search engines to completely ignore the meta keyword attribute years ago. |
| no meta keywords data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| Page Content | Page Content tips for freetechbooks.com: Use clear and descriptive anchor text for all internal links included within page content, guiding users (and search engines) to related topics and distributing link equity effectively across your site. |
| Web Page Content Length: 64999 characters | |
| H1 Heading | H1 Heading tips for freetechbooks.com: The H1 header plays a critical role in organizing content hierarchy, signaling the primary topic to crawlers while also guiding the reader's eye towards the core focus of the webpage. |
| no h1 heading data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| H2 Headings | H2 Headings tips for freetechbooks.com: The strategic inclusion of relevant long-tail keywords within well-structured H2 tags can capture niche search volume and improve the semantic relevance of a webpage's content. |
| no h2 headings data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| H3 Headings | H3 Headings tips for freetechbooks.com: Create a visually appealing and user-friendly interface by using H3 headers consistently for subheadings, improving readability and encouraging deeper exploration of your detailed content. |
| no h3 headings data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| H4 Headings | H4 Headings tips for freetechbooks.com: Detailed comparisons or case studies presented under clear H4 sub-headings within an article improve user engagement by making the information more digestible and actionable. |
| no h4 headings data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| H5-H6 Headings | H5-H6 Headings tips for freetechbooks.com: Strategically deploy H5 and H6 headers to create micro-content sections optimized for specific informational queries users might have about your products or services online. |
| no h5-h6 headings data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| Image ALT Attributes | Image ALT Attributes tips for freetechbooks.com: Ensure your alt attribute accurately describes the image for users relying on screen readers, directly translating the visual information into text to maintain content comprehensibility and inclusivity across all access methods. |
| http://freetechbooks.com/uploads/1742554677-msgp.jpg http://freetechbooks.com/uploads/1742553043-se60.png http://freetechbooks.com/uploads/1742273676-coverLADR4e.png http://freetechbooks.com/uploads/new-dark-grey-background_cr.jpg http://freetechbooks.com/uploads/1673390483-math-college-algebra--fa17-uco.jpg http://freetechbooks.com/uploads/1672997658-discmath-root-b.jpg http://freetechbooks.com/uploads/1672566839-Essentials_Scratch_v1.jpg http://freetechbooks.com/uploads/1672561425-1664663647-cover.png http://freetechbooks.com/uploads/1672561475-1664663253-364204073X.01._SCLZZZZZZZ_SX500_.jpg http://freetechbooks.com/uploads/1672561799-1664588541-FOAGaug2922publici_rs.jpg http://freetechbooks.com/uploads/1672562055-1646924278-unplugged-en-2.jpg http://freetechbooks.com/uploads/1672562105-1646918798-cover-small.jpg http://freetechbooks.com/uploads/1672562195-1641105945-practical_cryptography.png and 7 more... Count: 14 images with ALT attributes | |
| Robots.txt | Robots.txt tips for freetechbooks.com: While the robots.txt standard allows for comments starting with '#', use them sparingly within your directives to keep the file readable and concise for better maintainability. |
| file robots.txt was found on the website | |
| XML Sitemap | XML Sitemap tips for freetechbooks.com: The correct syntax and format of your XML sitemap are paramount; errors can result in pages not being crawled, indexed, or appearing correctly in search results, potentially harming your site's overall search visibility and performance. |
| no xml sitemap data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| Page Size | Page Size tips for freetechbooks.com: Large page sizes consume significant bandwidth, particularly affecting users with limited data plans or those accessing your site from regions with slower internet infrastructure. |
| page size: 63 kb | |
| Response Time | Response Time tips for freetechbooks.com: The average user expects websites to load visually within seconds; prioritize backend optimizations like database indexing and server hardware upgrades to drastically reduce server response time and Time To First Interactive (TTFI), crucial factors recognized by SEO best practices for maintaining visitor attention. |
| response time: 0.704 sec | |
| Minify CSS | Minify CSS tips for freetechbooks.com: Deliver faster, more responsive websites and positively influence SEO performance scores by configuring your build tools to inline small CSS files or serve minified CSS asynchronously through specific HTML script tags structured correctly for speed. |
| Minified: /css/bootstrap.min.yeti.css /bower_components/font-awesome/css/font-awesome.min.css Unminified: /css/custom.css /css/bbcode.css /css/seqola.css included in the page | |
| Minify JavaScript | Minify JavaScript tips for freetechbooks.com: Integrate automatic JavaScript minification into your website's deployment pipeline to ensure every version of your code is served in its most compact form, boosting performance metrics and improving SEO ranking factors related to site speed |
| Minified: /js/respond.min.js /bower_components/jquery/dist/jquery.min.js /bower_components/bootstrap/dist/js/bootstrap.min.js //freetechbooks-1.disqus.com/count.js Unminified: /js/seqola.js http://tags.expo9.exponential.com/tags/FreeTechBooks/ROS/tags.js detected during site scan | |
| Structured Data | Structured Data tips for freetechbooks.com: While Schema Markup itself doesn't directly guarantee higher rankings, it provides search engines with clear content context and enhances visibility via rich results, indirectly supporting improved search rankings for relevant user queries. |
| no structured data data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| CDN Usage | CDN Usage tips for freetechbooks.com: Minimize the risk of downtime during high-traffic events for your e-commerce or news website by distributing incoming traffic across multiple servers via a Content Delivery Network, ensuring consistent availability and quick content delivery |
| no cdn usage data for freetechbooks.com 2026-08-15T13:13:46+00:00 | |
| SSL certificates | SSL certificates tips for freetechbooks.com: Maintain your SSL certificate's validity by renewing it before expiration to avoid service disruptions, certificate errors, and potential loss of search engine ranking points associated with security warnings displayed to users accessing outdated or invalid HTTPS connections. |
| SSL is enabled on the website |
Estimated Traffic
| Minimum Daily Unique Visitors: | 4 431 |
| Minimum Daily Visits: | 5 178 |
| Minimum Daily Page Views: | 8 914 |
| Minimum Monthly Unique Visitors: | 132 930 |
| Minimum Monthly Visits: | 155 340 |
| Minimum Monthly Page Views: | 267 420 |
| Minimum Yearly Unique Visitors: | 1 595 160 |
| Minimum Yearly Visits: | 1 864 080 |
| Minimum Yearly Page Views: | 3 209 040 |
| Maximum Daily Unique Visitors: | 5 605 |
| Maximum Daily Visits: | 5 979 |
| Maximum Daily Page Views: | 10 089 |
| Maximum Monthly Unique Visitors: | 168 150 |
| Maximum Monthly Visits: | 179 370 |
| Maximum Monthly Page Views: | 302 670 |
| Maximum Yearly Unique Visitors: | 2 017 800 |
| Maximum Yearly Visits: | 2 152 440 |
| Maximum Yearly Page Views: | 3 632 040 |
Estimated Valuation
| Daily Revenue: | US$ 6 - 14 |
| Monthly Revenue: | US$ 180 - 420 |
| Yearly Revenue: | US$ 2 160 - 5 040 |
Estimated Worth
| Minimum: | US$ 3 240 |
| Maximum: | US$ 15 120 |
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