Ultracite
AI-ready code formatter that helps write and generate code faster.
Used in agent projects
69
0.5% of 12,697 public repos built with AI coding agents
Rank in prompts, structured output and evals
#1 of 4
by use in those projects
Downloads
1.2M
npm, last 7 days, ultracite
GitHub stars
3,317
last push Oct 10, 2026
How Ultracite is used
Ultracite is a dependency in 69 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.5%), #1 of 4 in prompts, structured output and evals. The most used alternative there is tiktoken. Projects that use it most often also use Biome (68.1%), Turborepo (56.5%), Zod (59.4%). It is more common in projects set up for OpenAI Codex (4.5%) than for GitHub Copilot (0.8%).
Often used with Ultracite
| Biome | 68.1% of Ultracite projects · 19.4× more than average |
|---|---|
| Turborepo | 56.5% of Ultracite projects · 18.0× more than average |
| Zod | 59.4% of Ultracite projects · 3.5× more than average |
| TypeScript | 94.2% of Ultracite projects · 1.7× more than average |
| Husky | 31.9% of Ultracite projects · 5.1× more than average |
| dotenv | 42.0% of Ultracite projects · 2.7× more than average |
| Lefthook | 27.5% of Ultracite projects · 27.3× more than average |
| oxfmt | 26.1% of Ultracite projects · 26.5× more than average |
By coding agent
| Claude Code | 1.6% of projects set up for it |
|---|---|
| Cursor | 1.9% of projects set up for it |
| GitHub Copilot | 0.8% of projects set up for it |
| OpenAI Codex | 4.5% of projects set up for it |
| OpenCode | 4.1% of projects set up for it |
| Gemini CLI | 1.4% of projects set up for it |
Share of public repos configured for each agent that list Ultracite as a dependency.
Install
| Package | npm install ultracite |
|---|---|
| Main stacks | TypeScript / JavaScript (53), Next.js (14), PHP (2) |
| Example projects | blockmatic/basilic, xmlking/spectacular, tontoko/fast-playwright-mcp, abbesm0hamed/paydusa, PaulRBerg/prb-effect |
Alternatives to Ultracite
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| tiktoken pypi Fast BPE tokenizer for OpenAI models enabling accurate token counting and text splitting. |
60 (0.5%) | 46.1M | 19.4K | — |
| tokenizers pypi Fast NLP tokenizer library by Hugging Face for text processing. |
32 (0.3%) | 43.7M | 11.2K | — |
| LangSmith pypi Platform client for monitoring, evaluating and debugging LLM applications. |
23 (0.2%) | 19.3M | 1,072 | MIT |