freetechbooks.com
🖥 Status: error
🕒 Response Time: 0.641 sec
⬅️ Response Code: 501
The number of uptime checks of freetechbooks.com performed over the past 631 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.
- O Site Status Rank
- 132 936
- Search Wikipedia
- freetechbooks.com
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Freetechbooks.com
status check request map as of August 14, 2026
Country report for freetechbooks.com as of August 14, 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 |
Thelondoneconomic.com | Freetechbooks.com | ||||
|---|---|---|---|---|---|
General SEO Report
| Page Title | Page Title tips for freetechbooks.com: Breadcrumb navigation structures on your website often display simplified versions of the full page title, offering users another touchpoint for understanding site hierarchy and content relevance intuitively. |
|---|---|
| Database of Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes Length: 92 characters | |
| Meta Description | Meta Description tips for freetechbooks.com: Formatting considerations, including punctuation and spacing, are important for a polished appearance in SERP snippets and preventing the meta description from being truncated awkwardly by search algorithms. |
| 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: Relying on meta keywords alone severely limits your website's visibility and modern SEO strategy; you must integrate your target keywords strategically throughout the visible HTML content and internal linking structure for better results. |
| no meta keywords data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| Page Content | Page Content tips for freetechbooks.com: Build trust and authority by creating educational page content that goes beyond surface-level information, offering deeper context, historical background, and industry trends. |
| Web Page Content Length: 64999 characters | |
| H1 Heading | H1 Heading tips for freetechbooks.com: Effective H1 tags should be concise yet descriptive, accurately reflecting the content of the subsequent section, guiding the reader towards relevant information and improving overall page relevance. |
| no h1 heading data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| H2 Headings | H2 Headings tips for freetechbooks.com: H2 tags provide an essential anchor point for internal linking strategies, allowing content creators to strategically link to other relevant pages within the website. |
| no h2 headings data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| H3 Headings | H3 Headings tips for freetechbooks.com: Ensure each H3 tag accurately reflects the specific content it introduces below, maintaining a logical and intuitive flow throughout your page layout, which helps users locate relevant information quickly and reinforces the content's topical focus for search engines. |
| no h3 headings data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| H4 Headings | H4 Headings tips for freetechbooks.com: H4 elements are crucial for creating a deeper level of content hierarchy beneath H3 headers, significantly improving readability by clearly organizing specific sub-topics within sections. |
| no h4 headings data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| H5-H6 Headings | H5-H6 Headings tips for freetechbooks.com: Consider using H5 or H6 for internal blog comment sections that are structured into threads or for tagging specific types of user-submitted content on community platforms. |
| no h5-h6 headings data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| Image ALT Attributes | Image ALT Attributes tips for freetechbooks.com: For decorative images or elements serving purely stylistic functions, utilize empty alt attributes (alt="") to signal to screen reader users and search engines that they are not conveying essential content, thus avoiding unnecessary verbosity. |
| 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: Be mindful that blocking access to vital JavaScript or CSS files via robots.txt might inadvertently break your website's layout and user experience for search engine crawlers, negatively impacting how your content is perceived and rendered. |
| file robots.txt was found on the website | |
| XML Sitemap | XML Sitemap tips for freetechbooks.com: For optimal website indexing, regularly update your XML sitemap to include new URLs and remove deprecated ones, submitting changes through Google Search Console whenever possible, because an outdated sitemap hinders search engines from discovering fresh content, potentially impacting your site's ranking and user engagement metrics. |
| no xml sitemap data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| Page Size | Page Size tips for freetechbooks.com: Mobile-first indexing requires fast mobile page speeds; analyze your mobile page sizes carefully and remove any unnecessary bloat to meet Google's speed guidelines effectively. |
| page size: 63 kb | |
| Response Time | Response Time tips for freetechbooks.com: Avoid excessive server-side processing which inflates page response times; instead, leverage client-side JavaScript and pre-rendering strategies for faster initial loads, improving core web vitals and SEO performance simultaneously. |
| response time: 0.704 sec | |
| Minify CSS | Minify CSS tips for freetechbooks.com: Enhancing your website's SEO strategy includes aggressive CSS minification by removing all redundant code, excessive whitespace, and documentation, which directly results in smaller file sizes, quicker page loading speeds that satisfy users and search engines alike (improving Core Web Vitals), and superior overall search rankings. |
| 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: Consider using advanced JavaScript minification tools that also perform tree shaking, removing unused code and dead variables automatically, which not only shrinks file sizes but also leads to more maintainable codebases and cleaner SEO profiles through efficient resource loading. |
| 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: Become more discoverable online by implementing Schema.org vocabulary correctly; detailed Schema Markup provides explicit information to search engines beyond HTML text, helping them understand entities, relationships, and context more effectively for better rankings. |
| no structured data data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| CDN Usage | CDN Usage tips for freetechbooks.com: Configure your CDN to efficiently cache static resources like high-resolution images, minified CSS files, and minified JavaScript files using appropriate TTL values and compression settings to drastically reduce server response times and bandwidth costs. |
| no cdn usage data for freetechbooks.com 2026-08-14T05:12:15+00:00 | |
| SSL certificates | SSL certificates tips for freetechbooks.com: Maintaining a valid SSL certificate is fundamental for securing sensitive data transmission on your website, ensuring user privacy and building trust through visual indicators like the padlock icon in browsers. |
| SSL is enabled on the website |
Estimated Traffic
| Minimum Daily Unique Visitors: | 9 782 |
| Minimum Daily Visits: | 11 432 |
| Minimum Daily Page Views: | 19 683 |
| Minimum Monthly Unique Visitors: | 293 460 |
| Minimum Monthly Visits: | 342 960 |
| Minimum Monthly Page Views: | 590 490 |
| Minimum Yearly Unique Visitors: | 3 521 520 |
| Minimum Yearly Visits: | 4 115 520 |
| Minimum Yearly Page Views: | 7 085 880 |
| Maximum Daily Unique Visitors: | 12 375 |
| Maximum Daily Visits: | 13 200 |
| Maximum Daily Page Views: | 22 276 |
| Maximum Monthly Unique Visitors: | 371 250 |
| Maximum Monthly Visits: | 396 000 |
| Maximum Monthly Page Views: | 668 280 |
| Maximum Yearly Unique Visitors: | 4 455 000 |
| Maximum Yearly Visits: | 4 752 000 |
| Maximum Yearly Page Views: | 8 019 360 |
Estimated Valuation
| Daily Revenue: | US$ 14 - 32 |
| Monthly Revenue: | US$ 420 - 960 |
| Yearly Revenue: | US$ 5 040 - 11 520 |
Estimated Worth
| Minimum: | US$ 7 560 |
| Maximum: | US$ 34 560 |
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