AI Developer Toolbox is a collection of free online tools for developers and AI enthusiasts. No sign-up, no paywalls — open the page and use it. Everything runs locally in your browser.
What we build
The site started with a single tool: the Token Stream Simulator, which simulates how LLMs emit text token by token — great for demos, screen recordings and teaching. Around it we added:
- Token Stream Simulator — adjustable 1–5000 tok/s with live Markdown rendering
- Token Counter — count tokens and estimate API costs
- CPU Benchmark Search — search, compare and match 6,715 PassMark CPU scores
- GPU AI Compute — AI score and tok/s for 102 GPUs running local LLMs
- Plus everyday dev tools: JSON formatter, Base64, timestamp, regex tester and more
Where the data comes from
CPU scores come from public PassMark rankings (August 2026 snapshot). GPU AI scores are aggregated from gpubattle.com/ai measurements. Treat all numbers as reference only and verify before making purchase decisions.
Technical notes
This is a fully static site — no backend, no database, no framework. All assets are served locally (no external CDN). Data you type into tools never leaves your browser and disappears on refresh.
Articles
The articles section features benchmark roundups, hardware tests and explainers I put together myself, paired with the tools. Sources and methodology are noted in each post.
Contact
Bug reports, tool ideas or just feedback — email [email protected].