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.
- B Site Status Rank
- 75 834
- 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 |
Boschrexroth.com | Freetechbooks.com | ||||
|---|---|---|---|---|---|
General SEO Report
| Page Title | Page Title tips for freetechbooks.com: Effective title tag creation hinges on balancing SEO best practices with user engagement principles; include specific, long-tail keywords that match user search intent near the start of the title, keep the entire title brief enough to be fully displayed in search snippets (typically under 60 characters), accurately represent the page's content to manage user expectations, and ensure each title is unique and targeted to the specific page's focus. |
|---|---|
| Database of Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes Length: 92 characters | |
| Meta Description | Meta Description tips for freetechbooks.com: Ensure every page has a unique meta description that accurately reflects its content; duplicating descriptions across pages confuses users and search engines alike regarding relevance. |
| 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: SEO experts universally advise against keyword stuffing in the meta keywords tag, as this practice has proven detrimental to rankings and can harm a website's credibility with search engines |
| no meta keywords data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| Page Content | Page Content tips for freetechbooks.com: Thoroughly research and synthesize information from multiple authoritative sources to create comprehensive and trustworthy page content, citing sources appropriately to build credibility and E-A-T. |
| Web Page Content Length: 64999 characters | |
| H1 Heading | H1 Heading tips for freetechbooks.com: Consistent branding through the H1 tag, perhaps by including your main site title, helps reinforce brand identity immediately upon arrival, aiding in building trust and recognition among your online audience quickly. |
| no h1 heading data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| H2 Headings | H2 Headings tips for freetechbooks.com: H2 headers are fundamental for content segmentation on landing pages, allowing you to clearly define different sections that address distinct user intents or answer specific questions related to your primary conversion goal. |
| no h2 headings data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| H3 Headings | H3 Headings tips for freetechbooks.com: When structuring your content, place H3 headers precisely where you introduce new, distinct ideas or detailed explanations, ensuring each one accurately reflects the following content to maintain clarity and authority. |
| no h3 headings data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| H4 Headings | H4 Headings tips for freetechbooks.com: Adapting your content structure with appropriately used h4 headers can improve mobile readability, ensuring a positive user experience on smaller screens, which is a ranking factor that benefits overall site performance. |
| no h4 headings data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| H5-H6 Headings | H5-H6 Headings tips for freetechbooks.com: For websites with a high volume of technical content, H5-H6 tags provide the necessary granularity to organize specifications, parameters, or detailed steps within larger instructional sections. |
| no h5-h6 headings data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| Image ALT Attributes | Image ALT Attributes tips for freetechbooks.com: Don't use generic or vague ALT text like "image" or "picture." Be specific and descriptive, ensuring your ALT attributes accurately explain the image's content and its relevance to the surrounding page text for optimal SEO. |
| 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: When defining crawl restrictions in robots.txt, exercise extreme caution to avoid accidentally blocking important pages or URL patterns that rank highly in search results, which could severely damage your SEO. |
| file robots.txt was found on the website | |
| XML Sitemap | XML Sitemap tips for freetechbooks.com: XML sitemaps play a crucial role in the initial indexing of a new website or after a significant redesign, providing search engines with a clear starting point, which can significantly shorten the time before the website's content becomes visible in search results, accelerating the path to acquisition. |
| no xml sitemap data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| Page Size | Page Size tips for freetechbooks.com: While optimizing for SEO, remember that page size affects core aspects like Core Web Vitals, user engagement metrics, and crawl efficiency, all vital for overall search visibility. |
| page size: 63 kb | |
| Response Time | Response Time tips for freetechbooks.com: Implement lazy loading for images and iframes to load content only when it enters the viewport, reducing initial page load response time and improving Core Web Vitals scores. |
| response time: 0.704 sec | |
| Minify CSS | Minify CSS tips for freetechbooks.com: Enhance your website's performance and user experience by automatically minifying CSS, a process that efficiently trims whitespace, comments, and redundant styles, directly leading to faster load times and improved Core Web Vitals. |
| 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: Reduce JavaScript file sizes through intelligent minification algorithms that remove unused code and optimize variable declarations, leading to faster website parsing and execution for all users, a key technical SEO aspect influencing search rankings |
| 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: Validate your Schema markup using free online tools like Google's Rich Results Test to ensure it adheres correctly to the Schema.org guidelines and JSON-LD formats, preventing potential errors that could lead to invalid structured data being ignored by search engines. |
| no structured data data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| CDN Usage | CDN Usage tips for freetechbooks.com: Consider using a CDN to deliver specialized media formats such as video streams or audio files; configure the CDN to support range requests and appropriate MIME types to efficiently serve large media files in segments, improving playback performance and reducing bandwidth consumption from your origin server. |
| no cdn usage data for freetechbooks.com 2026-08-14T17:08:03+00:00 | |
| SSL certificates | SSL certificates tips for freetechbooks.com: Regularly monitor SSL certificate validity and expiration dates to maintain uninterrupted secure connections and prevent service disruptions, ensuring your website remains accessible and trustworthy to all visitors at all times. |
| SSL is enabled on the website |
Estimated Traffic
| Minimum Daily Unique Visitors: | 5 580 |
| Minimum Daily Visits: | 6 521 |
| Minimum Daily Page Views: | 11 227 |
| Minimum Monthly Unique Visitors: | 167 400 |
| Minimum Monthly Visits: | 195 630 |
| Minimum Monthly Page Views: | 336 810 |
| Minimum Yearly Unique Visitors: | 2 008 800 |
| Minimum Yearly Visits: | 2 347 560 |
| Minimum Yearly Page Views: | 4 041 720 |
| Maximum Daily Unique Visitors: | 7 059 |
| Maximum Daily Visits: | 7 530 |
| Maximum Daily Page Views: | 12 706 |
| Maximum Monthly Unique Visitors: | 211 770 |
| Maximum Monthly Visits: | 225 900 |
| Maximum Monthly Page Views: | 381 180 |
| Maximum Yearly Unique Visitors: | 2 541 240 |
| Maximum Yearly Visits: | 2 710 800 |
| Maximum Yearly Page Views: | 4 574 160 |
Estimated Valuation
| Daily Revenue: | US$ 8 - 18 |
| Monthly Revenue: | US$ 240 - 540 |
| Yearly Revenue: | US$ 2 880 - 6 480 |
Estimated Worth
| Minimum: | US$ 4 320 |
| Maximum: | US$ 19 440 |
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