Dev tools · alternatives · 2026

24 alternatives to Legalize.js – object validation for node and the browser

JavaScript object validation for browsers + node. Contribute to paypal/legalize.js development by creating an account on GitHub.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Legalize.js – object validation for node and the browser launched in 2015; newer entries below may have overtaken it.

1. 1VJ
   validate.js - lightweight JavaScript form validation library▲102

   2011 · rickharrison.github.com · its alternatives →

2. 2
   Iso20022.js – Create payments in 3 lines of code▲291

   iso20022.js is an open source library to create and manage ISO20022 payment messages

   2024 · iso20022js.com · its alternatives →

3. 3
   I've been making JavaScript sandbox alone for 6 years▲397

   Hi HN! Thanks for your attention to my post. It was a big challenge to run most of Node.js packages in browser, fast moreover. Virtual File system, resolve import/export. I got cold many times, depressions, burned out, yet still alive and finished it. Many guys helped me with an advice. Many users give a lot of positive feedback. There are 200,000 monthly unique users. I work full time now because of the freemium business model. To be honest - I am happy after many years of hard work.

   2022 · playcode.io · its alternatives →

4. 4TW
   This website is valid JSON▲604

   2020 · webdatarender.com · its alternatives →

5. 5
   Form-validation.js – JavaScript form validation library▲29

   The most customizable validation framework for JavaScript. - soc221b/form-validation.js

   2020 · github.com · its alternatives →

6. 6
   Dinero.js▲102

   An immutable JS library for working with monetary values 💰⚒

   2018 · sarahdayan.github.io · its alternatives →

7. 7
   a small jQuery Form Validation library▲47

   Got bored of using other ones, so made my own. Contribute to jackfranklin/jQuery-Form-Validator development by creating an account on GitHub.

   2012 · github.com · its alternatives →

8. 8BB
   Browser based deep fakes in pure JavaScript▲117

   2021 · filter.mot.omg.lol · its alternatives →

9. 9
   Instant API – Build type-safe web APIs with JavaScript▲102

   Hey there HN! I just wrapped up an all-day documentation spree for Instant API, a JavaScript framework for easily building web APIs that implements type safety at the HTTP interface. It uses a function-as-a-service approach combined with a slightly modified JSDoc spec to automatically enforce parameter and schema validation before HTTP requests make it through to your code. You just write comments above your endpoint functions and voila, enforced type safety contracts between your API endpoints and your developers. OpenAPI specifications are generated automatically as a byproduct of simply…

   2023 · github.com · its alternatives →

10. 10
    DirtyShare, Pure JavaScript P2P File Sharing (in Node.js + Socket.io)▲75

    Looking to hire dedicated JavaScript developers? We’ve got you covered with our ultimate hiring guide. Let us help you today!

    2012 · gun.io · its alternatives →

11. 11
    A tamper-proof JavaScript data ledger▲6

    A tamper-proof Javascript data ledger. Contribute to ternent/ledger development by creating an account on GitHub.

    2021 · github.com · its alternatives →

12. 12VJ
    Valib.js - validation library for the browser and Node.js▲7

    2014 · sideralis.org · its alternatives →

13. 13
    status-checks▲74

    Create GitHub status checks using JavaScript Functions

    2019 · status-checks.netlify.com · its alternatives →

14. 14
    octaValidate▲69

    A client-side form validation library

    2022 · github.com · its alternatives →

15. 15IM
    I'm open sourcing Creditly.js, an intuitive credit card form▲34

    2014 · wangjohn.github.io · its alternatives →

16. 16
    JavaScript Quality Guide▲9

    :art: A JavaScript Quality Guide. Contribute to bevacqua/js development by creating an account on GitHub.

    2014 · github.com · its alternatives →

17. 17
    Bless your JavaScript code▲19

    A Node.js package for invoking divine blessings for one's Javascript code. - rudimk/dua.js

    2017 · github.com · its alternatives →

18. 18
    Testing Private Functions in JavaScript▲5

    Contribute to arvindrajnaidu/maineffect development by creating an account on GitHub.

    2020 · github.com · its alternatives →

19. 19
    Write ajax requests with template literals▲10

    the cleanest way to make http requests in js / node - Legitcode/legible

    2016 · github.com · its alternatives →

20. 20
    Janeway – A more mouse-driven, curses-based Node.js console▲25

    🌌 A Node.js console REPL with object inspection and many other features - 11ways/janeway

    2016 · github.com · its alternatives →

21. 21
    Node.js Web CRUD Abstraction for Express and MongoDB▲5

    Web application CRUD Node and Mongoose. Contribute to danielrohers/web-crud development by creating an account on GitHub.

    2015 · github.com · its alternatives →

22. 22
    Deep Type - validate JavaScript objects and arrays using GraphQL▲8

    Validate JS objects and arrays using graphql-esque syntax - bsteephenson/Deep-Type

    2015 · github.com · its alternatives →

23. 23
    Web Services for the JavaScript Developer▲5

    Learn how to develop REST and GraphQL APIs with JavaScript

    2018 · polyglotdev.gumroad.com · its alternatives →

24. 24TR
    TransomJS – Rapidly Develop REST APIS on Node Using TransomJS▲15

    The Rapid API development library.

    2018 · transomjs.github.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →