Does it work on sites other than Canvas?

Yes. The privacy guard works on any website — Blackboard, Moodle, Google Forms, and more. The quiz auto-fill and AI features are Canvas-specific.

How is this different from Canvas Hack or Canvas Cracked?

Canvas Open does everything they do — and more — completely free. No paywalls, no subscriptions. Plus features they don't have like AI answering, quiz auto-fill, and AI trojan protection.

100% Free & Open Source

Stop paying for Canvas privacy.

Canvas Open is a free, open-source extension that blocks all tab-switch and focus detection on Canvas LMS and every other website. Everything others charge for — and more — with zero paywalls.

Add to Chrome — Free Download .zip

No signup. No API key needed for privacy features. v3.1.0

What is Canvas Open?

The free alternative to paid Canvas extensions.

Canvas Open combines the best features of Canvas Hack and Canvas Cracked — tab-switch blocking, focus detection spoofing, quiz tools, and AI answering — into a single free, open-source extension. No subscriptions, no lifetime fees, no paywalls.

Built with Manifest V3, it works on Canvas LMS and any other website that tries to detect when you leave the tab. Lightweight at ~60KB with zero external dependencies and zero data collection.

Forever. No trials.

~60KB

Total size. No bloat.

MV3

Manifest V3. Future-proof.

Data collected. Ever.

Features

Everything you need. Nothing you don't.

Every feature included — no tiers, no upgrades, no upsells.

Privacy Guard

Blocks all focus, visibility, and tab-switch detection. Spoofs document.hidden, visibilityState, hasFocus(), IntersectionObserver, and more.

AI Answering

Send quiz questions to GPT-5.5, Claude, Gemini, or OpenRouter using your own API key. Homework mode or stealth auto-solve. Works on any site.

Quiz Auto-Fill

Fetches your previous quiz submission answers via Canvas API and auto-fills them on hover for retakes.

AI Trojan Protection

Removes hidden instructor-embedded traps from assignment text before AI tools can read them. Prevents wrong or flagged answers.

Status Overlay

Floating "Protected" pill shows all active protections at a glance. Shadow DOM isolated — completely undetectable by page scripts.

Works Everywhere

Privacy guard + AI answering works on Canvas, Blackboard, Moodle, Pearson, Google Forms, and any site. Auto-scrolls and solves every question.

Why switch?

Canvas Open vs. the paid alternatives.

Same features. More features. Zero cost.

Feature	Canvas Hack	Canvas Cracked	Canvas Open
Price	$14.99/mo or $84.99	Paid	Free forever
Open Source	✕	✕	✓
Privacy Guard	✓	✓	✓
Tab-Switch Blocking	✓	✓	✓
Quiz Auto-Fill	✕	✕	✓
AI Answering	✕	✕	✓
AI Trojan Protection	✓	✕	✓
IntersectionObserver Spoof	✕	✓	✓
rAF Heartbeat	✕	✓	✓
Status Overlay	✕	✓	✓
Kiosk Mode	✕	✕	✓
Works on All Sites	✓	✓	✓

Canvas Open combines the best of both — and adds more. For free.

Setup

Up and running in 30 seconds.

Download & Unzip

Click "Download .zip" above and unzip the file. You'll get a CanvasOpen folder.

Load in Chrome

Go to chrome://extensions, turn on Developer mode (top-right toggle), click "Load unpacked", and select the CanvasOpen folder.

Configure & Go

Click the extension icon, pick your AI provider, paste your API key, and toggle on the features you want. Done.

FAQ

Questions?

Yes, 100% free and open source. No subscriptions, no trials, no hidden fees. Every feature is included from day one.

Yes. The privacy guard works on any website — Blackboard, Moodle, Google Forms, Synap, and anything else that tries to detect tab switches or focus changes. The quiz auto-fill and AI features are Canvas-specific.

Only for AI features. Supports OpenAI, Claude, Gemini, and OpenRouter. Privacy guard, quiz auto-fill, and all other features work without any key.

Canvas Open stores everything locally in your browser. No data is sent to any server. The only external calls are to your chosen AI provider (OpenAI, Claude, Gemini, or OpenRouter) when using AI features, with your own API key. No telemetry, no tracking.

Canvas Open does everything they do — and more — completely free. No paywalls, no subscriptions. Plus exclusive features like AI answering, quiz auto-fill, AI trojan protection, and kiosk mode that the paid alternatives don't offer.

Canvas Open's privacy guard blocks the standard detection methods used by Canvas LMS and similar platforms. However, no tool is 100% guaranteed. Use responsibly.