T3 Env
Type-safe environment variable validation for Next.js applications with compile-time safety.
Dev workflow and config npm MIT
Used in agent projects
52
0.4% of 12,697 public repos built with AI coding agents
Rank in dev workflow and config
#34 of 88
by use in those projects
Downloads
3.2M
npm, last 7 days, @t3-oss/env-nextjs
GitHub stars
4,011
last push Apr 1, 2026
How T3 Env is used
T3 Env is a dependency in 52 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.4%), #34 of 88 in dev workflow and config. The most used alternative there is dotenv. Projects that use it most often also use Next.js (100.0%), Zod (98.1%), clsx (75.0%).
Often used with T3 Env
| Next.js | 100.0% of T3 Env projects · 4.4× more than average |
|---|---|
| Zod | 98.1% of T3 Env projects · 5.8× more than average |
| clsx | 75.0% of T3 Env projects · 4.2× more than average |
| Prettier | 73.1% of T3 Env projects · 4.2× more than average |
| Tailwind Merge | 71.2% of T3 Env projects · 4.2× more than average |
| TanStack Query | 67.3% of T3 Env projects · 7.0× more than average |
| Tailwind CSS | 94.2% of T3 Env projects · 2.7× more than average |
| Class Variance Authority | 63.5% of T3 Env projects · 4.5× more than average |
By coding agent
| Claude Code | 0.5% of projects set up for it |
|---|---|
| GitHub Copilot | 0.5% of projects set up for it |
| Cursor | 0.6% of projects set up for it |
| OpenAI Codex | 1.1% of projects set up for it |
Share of public repos configured for each agent that list T3 Env as a dependency.
Install
| Package | npm install @t3-oss/env-nextjs |
|---|---|
| Main stacks | Next.js (50), TypeScript / JavaScript (2) |
| Example projects | ask-the-hive/the-hive, fountain-ink/app, vinhnx/vtchat, JesusFilm/core, databayt/hogwarts |
Alternatives to T3 Env
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| dotenv npm Load environment variables from .env files into process.env. |
2,001 (15.8%) | 189M | 20.5K | BSD-2-Clause |
| python-dotenv pypi Load environment variables from .env files in Python applications. |
828 (6.5%) | 156M | 8,898 | BSD-3-Clause |
| Husky npm Modern Git hooks manager for running tasks on git events. |
797 (6.3%) | 36.2M | 35.3K | MIT |
| lint-staged npm Run linters on git staged files to catch issues before commit. |
591 (4.7%) | 29.5M | 14.7K | MIT |
| concurrently npm Run multiple npm scripts concurrently for efficient development workflows. |
572 (4.5%) | 22.2M | 7,856 | MIT |
| cross-env npm Set environment variables across Windows, Mac and Linux in npm scripts. |
265 (2.1%) | 25.8M | 6,521 | MIT |
| Pydantic Settings pypi Settings management and configuration from environment variables using Pydantic. |
251 (2.0%) | 96.8M | 1,475 | — |
| Rich pypi Python library for rich text and beautiful formatting in terminal output. |
243 (1.9%) | 117M | 57.5K | MIT |