Yup

What it is

Yup is a powerful object schema validator that provides an easy way to validate objects in JavaScript and TypeScript. It's widely used by developers to ensure data integrity before processing or storing it.

Yup stands out for its comprehensive set of validation methods and seamless integration into JavaScript and TypeScript projects, making it an ideal choice for developers who prioritize data integrity.

When it fits — and when it doesn’t

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

1. 01

   Steep learning curve for new users

   Yup's extensive feature set and complex schema definition can be overwhelming, requiring significant time to master.

2. 02

   Limited documentation and examples

   The official documentation lacks comprehensive guides for advanced use cases and troubleshooting common issues.

3. 03

   Frequent breaking changes between versions

   Upgrading to newer versions of Yup often requires significant code refactoring due to API changes, causing disruptions in development workflows.

4. 04

   Performance overhead for large datasets

   Validation can become slow and resource-intensive when dealing with complex schemas or large volumes of data, impacting application performance.

What it does well

• Extensive validation methods for various data types.

• Supports asynchronous validation and custom error messages.

• Flexible schema definition with support for nested objects.

Pricing

Free tier

YesOpen source — free to use

Paid from

$0

Model

Flat rate

Enterprise plan

No

Pricing not independently confirmed — check the vendor’s page.