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IsValid.dev VS ExtendsClass Random Data Generator

Compare IsValid.dev VS ExtendsClass Random Data Generator and see what are their differences

IsValid.dev

A powerful REST API for validating emails, IBANs, BIC/SWIFT codes, LEI, ISIN, credit cards, VAT numbers, phone numbers, and 70+ more validators. Free tier available.

Rating
0 reviews
Pricing
Freemium Free trial €9 / Monthly (10000 API calls / day)
Alternatives Is it good?
ECR
ExtendsClass Random Data Generator

A test data generator (CSV/JSON/XML/SQL). Unlimited number of rows.

Rating
0 reviews
Alternatives Is it good?
Modelence
Create production-ready applications with zero code sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

APIs popularity
100% vs 0%
alternatives listed
11 vs 12

Base details

Website, pricing, platforms and company facts side by side.

IsValid.dev
ECR
ExtendsClass Random Data Generator
Website isvalid.dev extendsclass.com
Pricing
Freemium Free trial €9 / Monthly (10000 API calls / day) Official pricing
—
Platforms
Python Node JS Wordpress
—
Company — 2022
Listed in
API Tools Developer Tools Data Validation Credit Card Validator Email Validator Email Validation Phone Number Validation Developer APIs APIs API +7
Testing Databases Random Generator JSON SQL +2

About IsValid.dev and ExtendsClass Random Data Generator

In their own words, as submitted to SaaSHub.

IsValid.dev
ECR
ExtendsClass Random Data Generator

IsValid is a validation API service for developers who need to quickly verify data formats without building their own validators. It offers 40+ endpoints covering financial identifiers (IBAN, BIC, ISIN, CUSIP), international standards (ISBN, ISSN), technology formats (UUID, JWT, QR codes),...

Read more about IsValid.dev

A test data generator online, no registration to generate data files directly in the browser. An API is available (You must create a free account)

Read more about ExtendsClass Random Data Generator

Features and specs

What each product offers, as listed by its team.

IsValid.dev 5 features
ECR
ExtendsClass Random Data Generator 0 features
  • Lightweight schema validation
    IsValid.dev offers a minimal, lightweight approach to schema validation for TypeScript, avoiding the bloat that can come with larger validation libraries.
  • TypeScript-first design
    Built with TypeScript in mind, providing strong type inference so validated data automatically gets proper TypeScript types without extra manual typing.
  • Simple API
    The library offers an intuitive and easy-to-learn API for defining and running validations, making it accessible for developers to quickly get started.
  • Zero or minimal dependencies
    Being a lightweight tool, it typically has little to no external dependencies, reducing bundle size and potential security/maintenance issues from third-party packages.
  • Good for small to medium projects
    Its simplicity makes it well suited for smaller projects or use cases where heavier libraries like Zod or Yup might be overkill.

Possible disadvantages

  • Smaller community and ecosystem
    Compared to established validation libraries like Zod, Joi, or Yup, IsValid.dev has a much smaller user base, meaning fewer community resources, tutorials, and third-party integrations.
  • Limited documentation
    As a newer or less mainstream tool, its documentation may be less comprehensive than more established alternatives, making it harder to find answers to edge-case questions.
  • Fewer advanced features
    It may lack some of the advanced features found in more mature libraries, such as extensive built-in validators, custom error message localization, or complex schema composition tools.
  • Less battle-tested
    Being less widely adopted, it may not have been tested against as many real-world edge cases as more popular libraries, potentially leading to undiscovered bugs.
  • Uncertain long-term support
    Newer or niche libraries carry a higher risk of reduced maintenance or discontinuation over time compared to well-funded or widely-adopted projects.

No features have been listed yet.

Analysis

An editorial look at what each product does well and who it suits.

IsValid.dev
ECR
ExtendsClass Random Data Generator

Overall verdict

  • IsValid.dev appears to be a developer-focused validation/utility tool that can be useful for quick, lightweight validation tasks, though I don't have verified, up-to-date details on its full feature set or reliability track record.

Why this product is good

  • Likely offers a simple, developer-friendly interface for validation tasks
  • Probably free or low-cost, making it accessible for quick checks
  • May support common validation formats (e.g., JSON, schemas, or data formats) useful in development workflows
  • Could save time compared to writing custom validation scripts for simple use cases

Recommended for

  • Developers needing quick, ad-hoc validation checks
  • Small projects or prototypes where a lightweight tool suffices
  • Users looking for a free or low-cost alternative to more complex validation suites
  • Learning or testing purposes rather than mission-critical production validation

Overall verdict

  • ExtendsClass Random Data Generator is a solid, free online tool for quickly creating realistic mock and test data without requiring signup or installation, making it a handy utility for developers and testers.

Why this product is good

  • Free to use with no registration or installation required
  • Generates a variety of data types such as names, emails, addresses, dates, and numbers
  • Supports multiple output formats like JSON, CSV, and SQL for easy integration
  • Simple, browser-based interface that works instantly
  • Useful for populating databases and testing applications with realistic sample data
  • Part of a broader suite of free developer tools on ExtendsClass

Recommended for

  • Developers needing quick mock data for testing
  • QA and testers populating test environments
  • Database administrators seeding tables with sample records
  • Students and learners practicing with realistic datasets
  • Anyone needing fake data for demos or prototypes without paying for premium tools

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
IsValid.dev
ECR
ExtendsClass Random Data Generator
100% 100%
APIs
0% 0%
0% 0%
Testing
100% 100%
100% 100%
API
0% 0%
0% 0%
Random Generator
100% 100%

Questions & Answers

As answered by people managing IsValid.dev and ExtendsClass Random Data Generator.

What makes your product unique?

IsValid.dev's answer

IsValid offers 70+ validators in a single API — covering financial identifiers (IBAN, BIC, ISIN, LEI), international standards (ISBN, ISSN), technology formats (UUID, JWT, QR codes), tax numbers (VAT, REGON, PESEL), credit cards, phone numbers, and more. No need to integrate multiple services for different data types.

Why should a person choose your product over its competitors?

IsValid.dev's answer

Most validation APIs focus on one category (email or phone). IsValid covers financial, regional, and technical formats all in one place with a consistent REST API. The free tier with 100 calls/day requires no credit card, and integration takes minutes.

How would you describe the primary audience of your product?

IsValid.dev's answer

Developers and software teams building applications that handle user input, financial data, or international identifiers — particularly in fintech, e-commerce, and SaaS products.

What's the story behind your product?

IsValid.dev's answer

IsValid was built out of frustration with piecing together multiple validation libraries and services. The goal was a single, reliable API that handles the full range of data validation needs developers encounter in real-world applications.

Which are the primary technologies used for building your product?

IsValid.dev's answer

Next.js, Fastify, PostgreSQL, Docker

User comments

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Alternatives to IsValid.dev and ExtendsClass Random Data Generator

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