jeroenjanssens.com
🖥 Status: up
🕒 Response Time: 0.112 sec
⬅️ Response Code: 200
1 jeroenjanssens.com's availability checks had carried out over the past 146 days, starting on March 22, 2026. Out of all tests, jeroenjanssens.com accessibility was confirmed 1 times, with March 22, 2026, being the most recent 200 status response. Jeroenjanssens.com had zero downtime according to all assessments made as of August 15, 2026. No error status code was returned as of August 15, 2026, based on all the responses received. For jeroenjanssens.com, 0.112 seconds was the response time on March 22, 2026, with an average of 0.112 seconds.
1
Last Updated: March 22, 2026
Jeroenjanssens overview
- Domain
- jeroenjanssens.com
- Title
- Jeroen Janssens
- Description
- 📛 I'm Jeroen (pronounced Yuh-ROON). Welcome to my site. 💻 I work at Posit, PBC as Head of Developer Relations. ✍️ Together with Thijs Nieuwdorp I wrote Python Polars: The Definitive Guide. I’m also the author of Data Science at the Command Line. 🐛 Most of my bugs are written in Python, R, JavaScript and Bash. Every now and then I dabble in C and Lua. I should learn Rust. 🇳🇱 I live in Rotterdam, the Netherlands with my wife and two kids. 🗽 My wife and I have lived in New York City for 2,5...
- Main Topic
- 👋 Hoi!
- J Site Status Rank
- 1 171 786
- Search Wikipedia
- jeroenjanssens.com
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Jeroenjanssens.com
status check request map as of August 15, 2026
Country report for jeroenjanssens.com as of August 15, 2026
| United States | 100.00% | ||||||||
| 05:17 | |||||||||
| Site | Total Checks | Last Modified |
|---|---|---|
| 1 | June 14, 2026 | |
| 6 | December 23, 2022 | |
| 1 | March 22, 2026 | |
| 28 | November 29, 2022 | |
| 3 | November 11, 2023 |
Jira.com | Jeroenjanssens.com | ||||
|---|---|---|---|---|---|
General SEO Report
| Page Title | Page Title tips for jeroenjanssens.com: When crafting website titles, it is essential to prioritize clarity and relevance, ensuring the title accurately reflects the specific content offered on the page to maintain user trust and satisfaction, which is crucial for reducing bounce rates and encouraging exploration of the site. |
|---|---|
| Jeroen Janssens Length: 15 characters | |
| Meta Description | Meta Description tips for jeroenjanssens.com: Keyword placement within the meta description is strategic; place your main keyword near the beginning for immediate impact and relevance, and incorporate related terms to capture a wider range of user search queries, all while maintaining a natural flow and avoiding keyword stuffing penalties. |
| 📛 I'm Jeroen (pronounced Yuh-ROON). Welcome to my site. 💻 I work at Posit, PBC as Head of Developer Relations. ✍️ Together with Thijs Nieuwdorp I wrote Python Polars: The Definitive Guide. I’m also the author of Data Science at the Command Line. 🐛 Most of my bugs are written in Python, R, JavaScript and Bash. Every now and then I dabble in C and Lua. I should learn Rust. 🇳🇱 I live in Rotterdam, the Netherlands with my wife and two kids. 🗽 My wife and I have lived in New York City for 2,5... Length: 528 characters | |
| Meta Keywords | Meta Keywords tips for jeroenjanssens.com: Keyword research tools like SEMrush or Ahrefs provide valuable insights into semantic keyword clusters and related phrases that can inform better content strategy and on-page optimization, replacing the outdated need for keyword stuffing in meta tags. |
| no meta keywords data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| Page Content | Page Content tips for jeroenjanssens.com: Ensure all page content is highly readable with appropriate sentence length, paragraph structure, and scannability features like bold text for key terms or phrases, directly improving user experience and reducing bounce rates. |
| Web Page Content Length: 18050 characters | |
| H1 Heading | H1 Heading tips for jeroenjanssens.com: Strategically place the H1 element prominently at the beginning of your page content or within the opening paragraph to immediately capture the reader's attention, establish context, and provide a clear focal point for scanning and navigating the information presented. |
| 👋 Hoi! Count: 1 heading tag | |
| H2 Headings | H2 Headings tips for jeroenjanssens.com: Differentiating your H2 headers based on the importance and depth of information ensures that the most significant subtopics receive appropriate emphasis, guiding user attention effectively throughout the document. |
| Latest articles Selected talks Newslette Count: 3 heading tag | |
| H3 Headings | H3 Headings tips for jeroenjanssens.com: Format h3 headers with clear styling and hierarchy to visually separate content sections, improving readability across devices and contributing to a professional site appearance. |
| no h3 headings data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| H4 Headings | H4 Headings tips for jeroenjanssens.com: Consistent application of H4 heading styles throughout your website contributes not only to a polished aesthetic but also reinforces your content's organizational framework. |
| no h4 headings data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| H5-H6 Headings | H5-H6 Headings tips for jeroenjanssens.com: Mobile responsiveness is still paramount even when using H5 headers; ensure the styling doesn't cause layout shifts that could negatively impact user experience on smaller screens. |
| no h5-h6 headings data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| Image ALT Attributes | Image ALT Attributes tips for jeroenjanssens.com: Ensure ALT attributes are unique and descriptive enough for visually impaired users to comprehend the visual element and its importance within the webpage context |
| no image alt attributes data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| Robots.txt | Robots.txt tips for jeroenjanssens.com: Incorporate precise User-agent directives in your robots.txt configuration to selectively apply blocking rules only to specific web crawlers like Googlebot or Bingbot, ensuring you don't inadvertently restrict access for major search engines while perhaps allowing other bots to crawl less important content. |
| file robots.txt was found on the website | |
| XML Sitemap | XML Sitemap tips for jeroenjanssens.com: Failure to submit an XML sitemap can lead search engines to miss substantial portions of your website's valuable content; actively uploading this sitemap via tools like Google Search Console ensures comprehensive discovery of all important pages, from critical homepage and contact points to niche, specialized content sections, enhancing online visibility. |
| no xml sitemap data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| Page Size | Page Size tips for jeroenjanssens.com: Avoid unnecessary scripts or heavy pop-ups that inject additional content and increase the overall page size, negatively impacting load time and potentially frustrating users. |
| page size: 18 kb | |
| Response Time | Response Time tips for jeroenjanssens.com: Faster server response times not only enhance user satisfaction and SEO rankings but also contribute positively to crawl efficiency, allowing search engines to better understand and index the content on your website. |
| response time: 0.112 sec | |
| Minify CSS | Minify CSS tips for jeroenjanssens.com: Minifying CSS is an essential technique for web performance optimization that reduces file transfer size by stripping out redundant or unnecessary code elements such as whitespace, empty lines, and non-essential comments, directly contributing to faster page loads. |
| Minified: /static/css/style.css included in the page | |
| Minify JavaScript | Minify JavaScript tips for jeroenjanssens.com: JavaScript minification offers a low-effort method with high returns, significantly cutting down file sizes and load times, making it an essential component for achieving high marks in Core Web Vitals and improved SEO. |
| Minified: /cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js https://f.convertkit.com/ckjs/ck.5.js /static/js/alpinejs.3.3.2.min.js https://static.cloudflareinsights.com/beacon.min.js https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015 detected during site scan | |
| Structured Data | Structured Data tips for jeroenjanssens.com: Correctly mark up your core schema types, such as Article or Product, provides essential context for crawlers, enhancing ranking potential and increasing the likelihood of rich result appearances in Google. |
| no structured data data for jeroenjanssens.com 2026-08-15T09:57:03+00:00 | |
| CDN Usage | CDN Usage tips for jeroenjanssens.com: Improve user experience and SEO rankings by ensuring your website exclusively uses a CDN for distributing static assets, maintaining a single origin point (your own server for dynamic content), which simplifies content delivery management and improves overall website speed. |
| content is delivered via CDN | |
| SSL certificates | SSL certificates tips for jeroenjanssens.com: The fundamental shift to HTTPS via SSL is crucial not just for security, but for SEO, as it provides a clear technical signal of website quality and safety to search engines, contributing to higher search result rankings and click-through rates (CTRs). |
| SSL is enabled on the website |
Estimated Traffic
| Minimum Daily Unique Visitors: | 1 088 |
| Minimum Daily Visits: | 1 272 |
| Minimum Daily Page Views: | 2 189 |
| Minimum Monthly Unique Visitors: | 32 640 |
| Minimum Monthly Visits: | 38 160 |
| Minimum Monthly Page Views: | 65 670 |
| Minimum Yearly Unique Visitors: | 391 680 |
| Minimum Yearly Visits: | 457 920 |
| Minimum Yearly Page Views: | 788 040 |
| Maximum Daily Unique Visitors: | 1 377 |
| Maximum Daily Visits: | 1 468 |
| Maximum Daily Page Views: | 2 478 |
| Maximum Monthly Unique Visitors: | 41 310 |
| Maximum Monthly Visits: | 44 040 |
| Maximum Monthly Page Views: | 74 340 |
| Maximum Yearly Unique Visitors: | 495 720 |
| Maximum Yearly Visits: | 528 480 |
| Maximum Yearly Page Views: | 892 080 |
Estimated Valuation
| Daily Revenue: | US$ 2 - 4 |
| Monthly Revenue: | US$ 60 - 120 |
| Yearly Revenue: | US$ 720 - 1 440 |
Estimated Worth
| Minimum: | US$ 1 080 |
| Maximum: | US$ 4 320 |
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