Transformer Explainer

Runs a small GPT-2 model in the page and shows attention and token probabilities as it generates text.

Artifact by Georgia Tech Polo Club of Data Science

IndexedMIT★ 9,070EducationAI-poweredNo sign-up

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Opens poloclub.github.io in a new tab. Nothing to install.

Open Transformer Explainer Source code

You provide: Prompt text and temperature setting
You get: Visualised attention and next-token odds
Account: No sign-up needed
AI: AI-powered; no API key needed
Your input: Not stated: check the tool's privacy notes before using private data
Price: Free to use
Made with: Open-source web app
Source: Open source
Link check: Answered on Oct 31, 2026

About

Transformer Explainer is an open-source web app in the education category (deep learning). It opens in your browser, so there is nothing to install. You provide prompt text and temperature setting and get visualised attention and next-token odds. It needs no account and no API key. It uses an AI model to do its job. The source code is public on GitHub (poloclub/transformer-explainer).

Category: Education · deep learning

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Stars: 9,070

Details

Auth: No auth
License: MIT
Repository: github.com/poloclub/transformer-explainer
Website: poloclub.github.io/transformer-explainer/
First seen: Oct 31, 2026
Last checked: Oct 31, 2026
Source: GitHub