Learning
Transformer Explainer
Watch a live GPT choose its next word, right in your browser
★ 8.5k
June 2026
MIT
Learning
What we checked ourselves
Not copied from the project's own blurb. These are things we opened and verified, with the date.
- 7 Sept 2026We checked that the link to the project still resolves.
- 14 Aug 2026We read the licence text itself (LICENSE). No unusual restrictions were stated.
- 1 Sept 2026We read the project's own documentation and found no sign that development has stopped.
Where this sits among the 38 tools we list in Learning
- Works without using a terminal30 of 38
- No API key required30 of 38
- Keeps your data on your own machine13 of 38
- Commercial use confirmed as allowed19 of 38
Only 5 of the 38 meet all of the conditions above.
Counted from our own checks: every tool we list is examined against the same criteria.
What it does
An interactive teaching tool from Georgia Tech that runs a real small GPT model in the browser so you can type your own text and watch, step by step, how the internals arrive at a prediction for the next token. It covers the attention and probability machinery visually rather than mathematically, which makes it a good way to build intuition or to explain the idea to someone else. Nothing to install and no account; the interface is English only, and the small English-trained model behaves oddly on Japanese input.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals
Before you start
- Setup difficultyEasy to start
- Command lineNot required
- API keyNot required
- Sends data onlineNo
Judged automatically from the project's own metadata. Always confirm on the official page.
Transformer Explainer FAQ
- Is Transformer Explainer free?
- Yes. It runs on your own machine, so there is no usage-based cost either.
- Do I need to install anything or write code to use Transformer Explainer?
- You install it like a normal desktop app. No command line involved.
- Does Transformer Explainer work on a phone?
- No. It needs a computer.
- Can I use Transformer Explainer commercially?
- The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| Transformer Explainer (this page) | Not needed | Not needed | No | No | Yes |
| primer-llm-embedding | Not needed | Not needed | No | Yes | Yes |
| dinov3-web | Not needed | Not needed | Yes | No | Not verified |
| Mr.-Ranedeer-AI-Tutor | Not needed | Not needed | No | No | Not verified |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.