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ProbiusOfficial

ProbiusOfficial/Hello-CTF

A free, open-source CTF beginner tutorial with matching challenges, plus a competition calendar and tool directory for the capture-the-flag community.

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What is it?

Hello CTF is a Mkdocs-Material based tutorial site for people new to capture-the-flag security competitions. It covers the main CTF categories such as Misc, Web, Crypto, Reverse and Pwn, plus extension topics like AWD, AI and blockchain, with each knowledge point paired with practice challenges.

Beyond the lessons, the project aggregates CTF information: international events are pulled daily from CTFtime RSS and domestic events are maintained by hand, with ICS calendar subscription. It also includes a tool encyclopedia, a knowledge-point tag index with payloads, and guides for deploying the Hello-CTF target ranges.

The site can be previewed locally with mkdocs serve or Docker Compose. The repository is organized into docs content, theme overrides, an event update script run by GitHub Actions, an admin panel and a message collector.

Key features

  • 01Beginner-oriented CTF lessons covering Misc, Web, Crypto, Reverse and Pwn.
  • 02Practice challenges with attachments, source code and Dockerfiles for each topic.
  • 03Daily-updated competition calendar with ICS subscription.
  • 04Tool encyclopedia and knowledge-point index with payloads.
  • 05Built with Mkdocs-Material and runnable locally or via Docker.

Use cases

  • Learning CTF from scratch with guided challenges.
  • Tracking upcoming international and domestic CTF competitions.
  • Running a club or team onboarding program for new security students.
  • Deploying a self-hosted copy of a Mkdocs-based security tutorial site.

Topics

#ctf#network-security#security-education#tutorial#writeups#mkdocs#penetration-testing#quickstart

FAQ

What is Hello-CTF?
A free, open-source CTF beginner tutorial with matching challenges, plus a competition calendar and tool directory for the capture-the-flag community. Hello CTF is a Mkdocs-Material based tutorial site for people new to capture-the-flag security competitions. It covers the main CTF categories such as Misc, Web, Crypto, Reverse and Pwn, plus extension topics like AWD, AI and blockchain, with each knowledge point paired with practice challenges.
Is Hello-CTF free to use? What license does it have?
Hello-CTF is open source under the GPL-3.0 license. Check the license terms before using it in commercial products.
Is Hello-CTF still maintained?
Actively maintained. The last commit to Hello-CTF was on Oct 22, 2026.
What can I use Hello-CTF for?
Learning CTF from scratch with guided challenges. Tracking upcoming international and domestic CTF competitions. Running a club or team onboarding program for new security students. Deploying a self-hosted copy of a Mkdocs-based security tutorial site.
Where can I get Hello-CTF?
The source code and installation instructions are on GitHub: https://github.com/ProbiusOfficial/Hello-CTF

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