Yup
Simple schema validation library for JavaScript with chainable API and error handling.
Forms, validation and schemas npm MIT
Used in agent projects
48
0.4% of 12,697 public repos built with AI coding agents
Rank in forms, validation and schemas
#10 of 22
by use in those projects
Downloads
12.2M
npm, last 7 days, yup
GitHub stars
23.7K
last push Oct 10, 2026
How Yup is used
Yup is a dependency in 48 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.4%), #10 of 22 in forms, validation and schemas. The most used alternative there is Zod. Projects that use it most often also use Axios (52.1%), Formik (47.9%), React Router (45.8%).
Often used with Yup
| Axios | 52.1% of Yup projects · 5.2× more than average |
|---|---|
| Formik | 47.9% of Yup projects · 156.0× more than average |
| React Router | 45.8% of Yup projects · 6.0× more than average |
| React | 85.4% of Yup projects · 2.0× more than average |
| React Hook Form | 41.7% of Yup projects · 5.2× more than average |
| React Hook Form Resolvers | 39.6% of Yup projects · 5.7× more than average |
| ESLint | 77.1% of Yup projects · 2.0× more than average |
| date-fns | 37.5% of Yup projects · 4.4× more than average |
By coding agent
| GitHub Copilot | 0.4% of projects set up for it |
|---|---|
| Claude Code | 0.3% of projects set up for it |
| Cursor | 0.3% of projects set up for it |
Share of public repos configured for each agent that list Yup as a dependency.
Install
| Package | npm install yup |
|---|---|
| Main stacks | TypeScript / JavaScript (28), Next.js (19), Python (1) |
| Example projects | thepower/PowerDapp, theskeletoncrew/treat-toolbox, Miladxsar23/smartstepper, sigp/siren, JesusFilm/core |
Alternatives to Yup
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| Zod npm TypeScript-first schema validation library with static type inference. |
2,153 (17.0%) | 326M | 44.1K | MIT |
| React Hook Form npm Performant form state library using React Hooks with minimal rerenders. |
1,021 (8.0%) | 54.7M | 44.9K | MIT |
| React Hook Form Resolvers npm Validation resolvers for React Hook Form supporting Zod, Yup, and others. |
885 (7.0%) | 45.1M | 2,264 | MIT |
| Pydantic pypi Data validation and parsing library using Python type hints. |
649 (5.1%) | 222M | 29K | — |
| Ajv npm Fast JSON Schema validator for runtime schema validation and serialization. |
131 (1.0%) | 391M | 14.9K | MIT |
| jsonschema pypi Python implementation of JSON Schema validation for structured data. |
129 (1.0%) | 125M | 4,989 | — |
| Protocol Buffers pypi Serialization format and code generator for structured data. |
75 (0.6%) | 154M | — | 3-Clause BSD License |
| drizzle-zod npm Generate Zod validation schemas automatically from Drizzle ORM database schemas. |
68 (0.5%) | 3.2M | 36K | Apache-2.0 |