diff --git a/docs/awesome/free-for-dev.md b/docs/awesome/free-for-dev.md
index 0c29d80294..546e3d55b3 100644
--- a/docs/awesome/free-for-dev.md
+++ b/docs/awesome/free-for-dev.md
@@ -1838,6 +1838,7 @@ Update Time, five active automations, webhooks.
   * [GitHub Education](https://education.github.com/pack) — Collection of free services for students. Registration required.
   * [Markdown Tools](https://markdowntools.com) - Tools for converting HTML, CSVs, PDFs, JSON, and Excel files to and from Markdown
   * [Microsoft 365 Developer Program](https://developer.microsoft.com/microsoft-365/dev-program) — Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform. The subscription is a 90-day [Microsoft 365 E5 Subscription](https://www.microsoft.com/microsoft-365/enterprise/e5) (Windows excluded) which is renewable. It is renewed if you're active in development(measured using telemetry data & algorithms).
+  * [Pyrexp](https://pythonium.net/regex) — Test and debug regular expressions. It offers a regex visualizer to display patterns.  
   * [RedHat for Developers](https://developers.redhat.com) — Free access to Red Hat products including RHEL, OpenShift, CodeReady, etc. exclusively for developers. Individual plan only. Free e-books are also offered for reference.
   * [smsreceivefree.com](https://smsreceivefree.com/) — Provides free temporary and disposable phone numbers.
   * [sandbox.httpsms.com](https://sandbox.httpsms.com) — Send and receive test SMS messages for free.