Kahoot AI Solver — Smart Assistant

Get an AI answer suggestion without leaving your Kahoot quiz. Connect your own API account, choose a model, and press a shortcut.

Website and interactive preview · Privacy policy · Install from the Chrome Web Store

The extension sends a screenshot of the visible tab to your selected provider and displays the result on the page. It never clicks or submits answers. Models load from Gemini, OpenAI or your compatible API; choose one that accepts images.

Install

From the Chrome Web Store:

Or load it unpacked:

git clone https://github.com/Ketchio-dev/Kahoot-AI-Solver.git

1. Open chrome://extensions/
2. Enable Developer mode
3. Click Load unpacked and select the cloned folder

Setup

1. Open the extension and click Settings. In the current store release (v1.4.0), use the ··· button instead. Its old “Youtube Ad Blocker” cover is cosmetic; the extension does not block ads.
2. Paste a Gemini API key, an OpenAI API key, or both. For an OpenAI-compatible server, set its API URL including /v1 (the default is https://api.openai.com/v1). Click Save Keys & Reload Models, then grant access to that server when Chrome asks.
   • Custom servers must support /models and /chat/completions with image input. Models with capabilities.vision: false are excluded.
   • Prefer HTTPS. HTTP transmits your API key and screenshots without transport encryption; use it only on a trusted network.
3. The three dropdowns fill with candidate image-capable models fetched live. Official OpenAI model metadata does not guarantee image or Chat Completions support; some listed models may still reject the request.
4. Assign a model to each slot. Your choice is stored locally and used by the matching shortcut.

Get keys from Google AI Studio and the OpenAI platform.

Usage

Shortcut	Action
Alt+Z	Solve with model slot 1
Alt+X	Solve with model slot 2
Alt+C	Solve with model slot 3

You can also press the buttons next to each dropdown in the popup.

Choose Normal or Stealth in the settings' Answer display dropdown. Normal (the default) shows a readable answer panel for 15 seconds. Stealth uses a small corner shape for single-choice answers and a compact text box for richer answers (8 seconds). Compact does not mean invisible: both modes can appear in screenshots or screen sharing. Neither mode clicks or submits answers.

Supported answer formats now include single-color options (including visible true/false options), multiple correct colors, typed text, ordered option labels for puzzles, and numeric answers for sliders. If the question, audio/video content or required context is missing, the model is instructed to report that it cannot determine an answer. Surveys and personal preferences are not factual questions to solve. These are screenshot-based suggestions, not guaranteed coverage of every Kahoot format or correct answers.

In Stealth mode, while a request is running, a faint dot pulses in the bottom-right corner. When the answer arrives, that dot turns into the shape and color of the correct option for eight seconds, and the extension icon flashes the same color:

Color	Kahoot shape	Indicator
Red	Triangle	▲
Blue	Diamond	◆
Yellow	Circle	●
Green	Square	■

In Stealth mode, errors surface as a black ! dot; Normal mode shows the error message in its panel. Errors are also logged to the browser console. The compact single-answer indicator is 14px and click-through.

Holding a shortcut down will not stack requests: while one solve is in flight, further triggers are ignored so you are not billed for duplicate calls.

In the prepared v1.4.1 update, API requests time out after 25 seconds, before Chrome's service-worker fetch deadline. If the worker is interrupted, the page clears its pending state with an error after 30 seconds. Slow models may need another attempt or a faster model; requests are never retried automatically.

Audio and video questions

The extension does not currently record sound or upload video. In settings, paste a transcript, captions or observations into Audio/video context, then click the desired solve button. That text is sent with the screenshot, is not saved to disk/storage, and is discarded when the popup closes. Keyboard shortcuts do not include this context. Do not paste sensitive material you do not want sent to the selected provider.

Direct media support requires more than a model capability flag: the chosen server must also accept the exact audio/video request format. A future explicit tab-recording flow should capture tab audio (not the microphone) with a visible recording indicator, provide stop/cancel controls, and use transcription plus sampled video frames or a verified native multimodal endpoint. Missing media content should not be guessed.

How live model loading works

models.js calls:

• GET https://generativelanguage.googleapis.com/v1beta/models — paginated, keeping only models that advertise generateContent
• GET {OpenAI API URL}/models — explicit capabilities.vision metadata takes priority when present; otherwise speech, image-generation, embedding, moderation and legacy completion models are filtered out by id pattern

Results are merged into a single provider-tagged list. Each slot starts with Choose a model… and requires an explicit selection. No model is automatically assigned. Refresh preserves your selection when it is available; if it disappears, choose another model rather than silently switching to a different paid model. Nothing is cached between popup openings — hitting Refresh model list always re-queries the APIs, so newly released models appear without an extension update.

Files

File	Purpose
models.js	Live model discovery for both providers
background.js	Service worker: screenshot capture, model calls, icon feedback
popup.html / popup.js	Settings UI, key storage, slot assignment
content.js / styles.css	Corner indicator for pending, answer and error states
manifest.json	MV3 manifest, permissions, shortcuts

Privacy

API keys and slot selections live in chrome.storage.local on your machine. Screenshots go directly from your browser to the provider you chose. There is no backend server.

Development checks

node --test tests/regression.cjs tests/landing.cjs

tests/landing.cjs statically checks the docs/ site (links, anchors, install URL, shortcuts against the manifest, icon sizes). It needs no network access or API keys. The regression tests cover response validation, custom API routing and model filtering, concurrent solve protection, and indicator timer cleanup. They do not replace testing the unpacked extension in Chrome.

tests/e2e.cjs creates a local Kahoot-style quiz and tests model discovery, explicit selection, refresh persistence, model switching, screenshot capture, real API calls and answer indicators for arithmetic, science, geography, multiple correct answers, typed text, ordering, numeric answers and transcript-assisted answers across both display modes. Install playwright-core in your test environment and run with E2E_API_KEY and E2E_CHROME_PATH (an extension-capable Chrome for Testing binary). It uses the test API at http://100.81.152.90:20128/v1. Credentials are supplied only by environment variable and temporary profiles are removed afterward. The test pre-grants permissions in a temporary extension copy and invokes the solve entry point directly. It was not run for this release preparation.

Manual checks of the prepared v1.4.1 package in Ego Lite on macOS used only local synthetic quizzes and the existing Muse test server. They covered native custom-server permission approval, API-key/settings persistence, explicit model selection, refresh preservation, all three Option shortcuts, the actual toolbar popup solve button, Normal/Stealth display, single-choice, multiple-choice, typed, numeric and ordered answers, missing-model errors and resting product icons after success/error. The first native request left a pending indicator behind; the timeout and pending-state recovery were then added and subsequent sample solves completed. The initial interruption's cause was not confirmed. Timeout recovery is covered by regression tests, not a deliberately stalled native API test. These checks do not establish accuracy on real Kahoot games or compatibility with every provider.

Prepare an extension package

v1.4.1 has been uploaded to the existing Chrome Web Store item and submitted for review. The console currently shows it as pending review; the published store version remains v1.4.0. Automatic publication is disabled, so approval will leave the update staged for a separate publish action. Staged updates expire 30 days after approval.

python3 tools/package-extension.py

This creates store-assets/kahoot-ai-solver-<manifest version>.zip with only the ten extension files at its root. It validates the manifest, ZIP checksums and packaged bytes, and refuses to overwrite an existing package. The v1.4.0 ZIP, description and historical screenshots are preserved. store-assets/description-en-1.4.1.txt contains the prepared listing copy for the new Settings button. Do not use store-assets/source/build.py for a package-only update: that artwork builder has a hardcoded v1.4.0 output filename.

Website and logo

The English landing page is published from docs/ through GitHub Pages (main, /docs). docs/assets/logo.svg is the logo source. tools/build-site.cjs renders icon16.png, icon48.png and icon128.png from it, renders the 1200 × 630 sharing image from docs/assets/social-card.svg, and rebuilds docs/privacy.html from PRIVACY.md. The sharing card uses outlined type, so rendering it does not depend on installed fonts:

npm install --no-save @resvg/resvg-js
node tools/build-site.cjs

The icons ship inside the extension package, so a new logo reaches the Chrome Web Store only with the next uploaded version.

The site loads nothing from third parties. Headlines use Bricolage Grotesque (SIL Open Font License 1.1, docs/assets/fonts/OFL.txt), self-hosted as a 32 KB Latin subset. It was built from the google/fonts variable file with fontTools: pin opsz=60 wdth=100, keep wght=500:800, then pyftsubset to Basic Latin and Latin-1 as WOFF2. Body text uses the system font.

Disclaimer

Built for learning and research. Using it to cheat in a graded or competitive setting is on you.