SaaSHub helps you find the best software and product alternatives Learn more →
Top 11 TypeScript Data Validation Projects
-
Do you remember how 5-7 years ago everyone used Yup or Ajv and was genuinely happy about it? I have to admit half of the internet is still happy about it 🫡
-
Puter.js
Puter.js - The Backend for AI-Generated Apps. One-shot full-stack apps with your existing AI coding tool. Puter.js gives you Auth, Storage, DB, AI & more, with up to 90% fewer AI tokens than other backend platforms.
-
-
ajv
The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)
Those sizes are measured with tree-shaking. fast-json-stringify is the only one here that corrupts and coerces without telling you - and adding Ajv in front of it fixes that for about 46 bytes, since it already depends on Ajv anyway.
-
OpenMetadata
The Open Context Layer for Data and AI , OpenMetadata is the open platform for building trusted data context and business semantics for humans, AI assistants, and agents.
Project mention: Show HN: Marmot – Single-binary data catalog (no Kafka, no Elasticsearch) | news.ycombinator.com | 2025-12-02Great to see Marmot here and I'm a huge fan of your project. Recently, we deployed a catalog but we went with open-metadata https://open-metadata.org/ another amazing project.
What we missed on marmot was existing integrations with Airflow and other plugins like Tableau, PowerBI etc. We're an enterprise and needed a more mature product. Fingers crossed marmot reaches there soon.
-
Superstruct - Composable way to validate data in JavaScript
-
-
openapi-cop
A proxy that validates responses and requests against an OpenAPI document. https://www.npmjs.com/package/openapi-cop https://hub.docker.com/r/lxlu/openapi-cop
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
-
impler.io
Powerful CSV & Excel Import experience for SaaS 🚀 Save months building data import experience from scratch 💰
-
-
-
express-joi-validations
Express middleware to validate request (headers, params, query, body) using Joi
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
TypeScript Data Validation discussion
TypeScript Data Validation related posts
-
Contract Testing: Catch Breaking API Changes Before Your Consumers Do
-
How to Validate JSON Schema: A Complete Developer Guide
-
Programmers and software developers lost the plot on naming their tools
-
How to validate fetched response
-
Show HN: Token-efficient zod-like schema definition library for LLMs
-
Nuxt3 form validation on client side with Yup
-
React’s Four Horsemen of the Frontendpocalypse
-
A note from our sponsor - SaaSHub
www.saashub.com | 16 Aug 2026
Index
What are some of the best open-source Data Validation projects in TypeScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Yup | 23,674 |
| 2 | react-jsonschema-form | 15,863 |
| 3 | ajv | 14,807 |
| 4 | OpenMetadata | 14,801 |
| 5 | Superstruct | 7,142 |
| 6 | recce | 472 |
| 7 | openapi-cop | 370 |
| 8 | impler.io | 288 |
| 9 | Safen | 38 |
| 10 | structlm | 8 |
| 11 | express-joi-validations | 2 |
Sponsored
Puter.js - The Backend for AI-Generated Apps
One-shot full-stack apps with your existing AI coding tool. Puter.js gives you Auth, Storage, DB, AI & more, with up to 90% fewer AI tokens than other backend platforms.
developer.puter.com