Technology history for pdf4pro.com
Stack size over time
From 8 detected technologies in Apr 2019 to 6 in Aug 2026 (peak 9).
Currently detected
- Bootstrap since Apr 2019
- Google Font API since Apr 2019
- jQuery since Apr 2019
- Nginx since Jun 2020
- Open Graph since Sep 2022
- Cloudflare since May 2024
Previously used
- HSTS Feb 2024 to Jun 2026 · 2 yrs
- Stimulus Nov 2024 to May 2025 · 6 mo
- Cloudflare Browser Insights May 2024 to Oct 2024 · 5 mo
- HTTP/3 May 2024 to Oct 2024 · 5 mo
- C Feb 2023 to Feb 2023 · 1 mo
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- PHP Apr 2019 to Jan 2021 · 1 yr
- Yii Apr 2019 to Jan 2021 · 1 yr
- Apache HTTP Server Apr 2019 to May 2020 · 1 yr
- CentOS Apr 2019 to May 2020 · 1 yr
- OpenSSL Apr 2019 to May 2020 · 1 yr
Timeline
2026 1 dropped
- dropped HSTS Aug 2026 · Security
2025 1 dropped
- dropped Stimulus Jul 2025 · JavaScript frameworks
2024 6 added · 3 dropped
- dropped Cloudflare Browser Insights Dec 2024 · Analytics
- dropped HTTP/3 Dec 2024 · Miscellaneous
- added Nginx Nov 2024 · Web servers
- added Stimulus Nov 2024 · JavaScript frameworks
- dropped Nginx Jun 2024 · Web servers
- added Cloudflare May 2024 · CDN
- added Cloudflare Browser Insights May 2024 · Analytics
- added HTTP/3 May 2024 · Miscellaneous
- added HSTS Feb 2024 · Security
2023 1 added · 1 dropped
2022 1 added
- added Open Graph Sep 2022 · Miscellaneous
2021 1 added · 3 dropped
- dropped Wheelio Dec 2021 · Widgets
- added Wheelio Sep 2021 · Widgets
- dropped PHP Mar 2021 · Programming languages
- dropped Yii Mar 2021 · Web frameworks
2020 1 added · 3 dropped
- dropped Apache HTTP Server Jul 2020 · Web servers
- dropped CentOS Jul 2020 · Operating systems
- dropped OpenSSL Jul 2020 · Web server extensions
- added Nginx Jun 2020 · Reverse proxies