Life & fun · alternatives · 2026

24 alternatives to Validate-asm – an asm.js validator/ linter for high performance JS

:skull: [MERGED UPSTREAM] Like JSLint, but for asm.js - alexanderGugel/validate-asm

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Validate-asm – an asm.js validator/ linter for high performance JS launched in 2015; newer entries below may have overtaken it.

1. 1
   Jaws – a JavaScript to WASM ahead-of-time compiler▲290

   I've open sourced a JavaScript to WASM compiler. It's an experimental tool, but given the semantics I already implemented, I'm fairly certain I am able to eventually cover 100% of JavaScript spec. Any ideas, questions or critique welcomed! If you are interested in WASM, especially with new proposals like WASM GC or exception handling, it might be a good source of seeing these features in action - the project has a few thousand lines of hand written WAT so far.

   2024 · github.com · its alternatives →

2. 2
   Lint for HTTP▲138

   Validator for HTTP. Contribute to vfaronov/httpolice development by creating an account on GitHub.

   2016 · github.com · its alternatives →

3. 3VJ
   validate.js - lightweight JavaScript form validation library▲102

   2011 · rickharrison.github.com · its alternatives →

4. 4
   Faster UTF-8 validator▲122

   A very fast library for validating UTF-8 using AVX2/SSE4 instructions - zwegner/faster-utf8-validator

   2019 · github.com · its alternatives →

5. 5
   markuplint▲62

   Linter that gives peace of mind in your markup

   2021 · markuplint.dev · its alternatives →

6. 6
   A New Python Linter▲69

   A linter to prevent exception handling antipatterns in Python (limited only for those who like dinosaurs). - guilatrova/tryceratops

   2021 · github.com · its alternatives →

7. 7
   octaValidate▲69

   A client-side form validation library

   2022 · github.com · its alternatives →

8. 8
   Jazzle – An Innovative, Fast Transpiler for ECMAScript 2015 and later▲61

   An Innovative, Fast Transpiler for ECMAScript 2015 and later - JazzleWare/jazzle

   2017 · github.com · its alternatives →

9. 9
   Form-validation.js – JavaScript form validation library▲29

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

   2020 · github.com · its alternatives →

10. 10
    Validatum – build fluent validation functions in .NET▲6

    An open-source library for building fluent validation functions for .NET. - bsheldrick/validatum

    2021 · github.com · its alternatives →

11. 11
    Open-source cypress for back end testing▲22

    For the past few months we’ve been building a simple jest/typescript-based high-level language for writing and running integration tests. We're open-sourcing it now and are excited to share it with you: https://github.com/traceloop/jest-opentelemetry Why we built this: - There are many solid frameworks for FE / browser testing, but none with high-level constructs for testing BE flows - We were missing a way to validate side effects for complex backend systems, especially across async queueing systems Our beta version lets you send an API call to a system and…

    2023 · github.com · its alternatives →

12. 12
    Coseq – high order functions for JavaScript async/sync iterators▲9

    high order functions for JavaScript async/sync iterators - GitHub - MiguelCastillo/coseq: high order functions for JavaScript async/sync iterators

    2017 · github.com · its alternatives →

13. 13
    Layerfig Type-safe layered config for JavaScript/TS with any validator▲6

    Type-safe layered configuration. Merge files and environment variables, validate with any schema, and get a runtime-checked object with full TypeScript IntelliSense.

    2025 · layerfig.dev · its alternatives →

14. 14TH
    Tree-hugger-JS: CSS selectors for JavaScript AST analysis and MCP▲7

    I built a library that lets you find code patterns using familiar CSS-like selectors, then connected it to Claude via MCP so AI assistants can understand and refactor codebases. The Approach // Find code patterns with intuitive selectors: const asyncFunctions = tree.findAll('function[async]'); const todoComments = tree.findAll('comment[text="TODO"]'); const reactHooks = tree.hooks(); // Built-in React support // Chain smart transformations: tree.transform() .rename('oldFunction', 'newFunction') .removeUnusedImports() .toString(); Key Features - CSS-like…

    2025 · its alternatives →

15. 15
    Jev-lint – semantic linter with plain English rules▲5

    Lint JavaScript and TypeScript against plain-English project conventions with Jev. - zdenham/jev-lint

    Sep 2026 · github.com · its alternatives →

16. 16
    deno_validate▲3

    A simple validation library for Deno

    2022 · deno.land · its alternatives →

17. 17
    JS-Restructure, a Go-Restructure JavaScript clone▲12

    JavaScript matching REs into objects. Contribute to benjamingr/js-restructure development by creating an account on GitHub.

    2016 · github.com · its alternatives →

18. 18
    Xjs – Elixir syntax, JavaScript semantics (or transpilers made easy)▲8

    elixir syntax, javascript semantics. Contribute to aaron-lebo/xjs development by creating an account on GitHub.

    2016 · github.com · its alternatives →

19. 19
    Jazzer.js – Fuzzing for JavaScript is now effective▲9

    Coverage-guided, in-process fuzzing for Node.js. Contribute to CodeIntelligenceTesting/jazzer.js development by creating an account on GitHub.

    2022 · github.com · its alternatives →

20. 20VJ
    Valib.js - validation library for the browser and Node.js▲7

    2014 · sideralis.org · its alternatives →

21. 21
    Xtypejs – Efficient data-validating pseudo types for JavaScript▲10

    Elegant, highly efficient data validation for JavaScript. - lucono/xtypejs

    2015 · github.com · its alternatives →

22. 22
    Validater – a python tool to validate data by schema▲5

    A simple, fast, extensible python library for data validation. - guyskk/validr

    2016 · github.com · its alternatives →

23. 23
    Smart JSON Linter & Formatter▲6

    Just like jsonlint, but smarter

    2025 · its alternatives →

24. 24
    CodeJS : An Actionscript 3.0-like syntax for Javascript▲6

    CodeJS | Class / Object Description Engine for JavaScript - neuromantic/CodeJS

    2011 · github.com · 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 →