How do I earn a verified certificate on Erthiox?

Complete 100% of all lessons, interactive coding tasks, and quizzes in any course to automatically receive a verified certificate with a unique credential hash ID.

Where can I view or download my earned certificate?

Navigate to your Profile page (platform/profile.html) under Completed Certifications to view full-screen certificates, download PNG images, or export vector PDFs.

How does public certificate verification (verify.html) work?

Anyone can verify the authenticity of an Erthiox credential 24/7 by visiting erthiox.com/verify.html and entering the unique Certificate Verification ID.

How do I add my Erthiox certificate to LinkedIn?

Click 'Share to LinkedIn' on your certificate modal or add it under LinkedIn Licenses & Certifications with your public verification link (erthiox.com/verify.html?id=YOUR_ID).

What is the LinkedIn Post Builder tool?

The LinkedIn Post Builder (platform/post-builder.html) provides proven post copywriting frameworks, live feed preview, Unicode text formatting, and OAuth direct publishing.

Are all courses and certificates on Erthiox free?

Yes, 100% free forever. All 5,000+ interactive lessons, 3D labs, simulations, career roadmaps, and verified certificates have no subscription fees or paywalls.

How does the in-browser code sandbox runner work?

Programming exercises feature an embedded code runner supporting JavaScript, Python, HTML/CSS, C++, Java, and Rust with real-time browser execution.

How do I sync my progress across multiple devices?

Log in with Google Firebase Auth via the topbar Account icon. Progress, completed courses, and certificates sync seamlessly across all devices.

Platform Guide & Action Center

verified Certificates & Public Verification

To earn an official Erthiox course certificate:

Enroll in any subject on the Courses Catalog.
Complete 100% of all lessons, interactive sandbox coding tasks, and quizzes.
Once completed, your certificate with a unique verification hash ID is issued instantly.

Verification ID: Every credential gets an immutable ID (e.g. ERTH-WDEV-8F92A1) registered in our public registry.

Access your earned credentials anytime from your profile:

Go to Profile & Account Settings.
Scroll down to Completed Certifications.
Click any certificate to view, download high-res PNG images, or export vector PDFs.

Erthiox offers 24/7 online credential authentication:

Visit erthiox.com/verify.html.
Enter the Certificate Verification ID (or scan the QR code).
The system validates recipient name, course title, and completion date.

post_add LinkedIn Post Builder & Crafter

The LinkedIn Post Builder helps you craft engaging LinkedIn posts without generic AI text:

Proven Frameworks: Technical breakdowns, project releases, and learning milestone blueprints.
Unicode Formatting: Format titles in bold, italic, or code typography.
Feed Simulator: Preview exact desktop and mobile feed layouts before posting.

Highlight any text in the editor and click Bold or Italic. The tool converts text into native LinkedIn-compatible Unicode font characters.

Yes! Click Connect LinkedIn in the LinkedIn Post Builder to authenticate via official LinkedIn OAuth and publish directly.

school Courses, Lessons & Sandbox Code Runner

Yes, 100% free! All 5,000+ interactive lessons, 3D labs, simulations, skill roadmaps, and verified certificates are free for everyone with zero paywalls.

Coding lessons feature an embedded browser sandbox supporting Python, JavaScript, HTML/CSS, C++, Java, and Rust with real-time execution.

Lesson progress and quiz scores are stored in browser LocalStorage and synced automatically to Google Firebase cloud when signed in.

science Interactive Labs & Multi-Agent Simulations

Interactive Sandbox Labs offer visual simulation spaces for Aerospace, Physics, Electromagnetism, Chemistry, Finance, and Statistics.

Explore complex systems in Multi-Agent Simulations (Psychology Island, Neural Swarm, Game Theory, and Market Equilibrium).

map Career Paths, Roadmaps & Library

Explore Career Roadmaps to visualize structured learning pathways for tech roles (Software Engineer, Quant, AI Specialist, UI/UX Designer).

Digital Library: Curated technical books.
Publications: Computing research papers.
Talks: Engineering keynote lectures.

person Account, Sync & Arcade Games

Log in with Google Firebase Auth via the topbar Account button to automatically sync progress across all your devices.

Earn XP by completing daily lessons and quizzes. Build activity streaks and test your skills in Constellations Arcade Game!

Erthiox Guide & Action Center

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