yup
Dead simple Object schema validation
Schema validation popular with forms.
When to choose it: Form validation, especially with Formik, or teams already familiar with its object-schema API.
- + Form ecosystem (Formik)
- + Familiar API
- - Less precise inference than Zod
- - Chaining quirks
- Latest version
- 1.7.1
- Monthly downloads
- 46,370,880
- GitHub stars
- 23,678
- Minified + gzip
- 13.1 kB
- Dependencies
- 4
- License
- MIT
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Data from npm, Bundlephobia and GitHub. Last updated 2026-06-02.