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Life & fun · alternatives · 2026

EC

ES-Checker is a feature detection library for ECMAScript that helps developers identify which JavaScript features are supported in their environment. Launched in 2015, it allows users to test for compatibility with… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ES-Checker, a feature detection library for ECMAScript launched in 2015; newer entries below may have overtaken it.

  1. 1

    Open sourcing Ezno's checker and trying out / previewing the JavaScript type checker today

    2023 · github.com · its alternatives →

  2. 2

    Introducing Ezno and the current state of the project.

    2022 · kaleidawave.github.io · its alternatives →

  3. 3

    DeepScan is a cutting-edge static analysis tool for JavaScript. You can inspect all of your JavaScript code comprehensively.

    2017 · deepscan.io · its alternatives →

  4. 4
    is.js▲132

    Micro check library for programmers

    2015 · is.js.org · its alternatives →

  5. 5
    Checker▲124

    Detect fake signups in under 200ms with an easy-to-use API

    2025 · its alternatives →

  6. 6

    Yes, it's open source: https://github.com/lissy93/web-check :) Why I'm building this? There are a lot of tools out there for discovering meta and security data relating to a website, IP or server. But currently, there isn't anything that does everything, all in one place and without a paywall/ user sign up. It's still a WIP, and I'm working on a new version, with some more comprehensive checks, so any feedback would be much appreciated :)

    2024 · v1.web-check.xyz · its alternatives →

  7. 7

    Hello, folks. I'm Jiang, the author of ESInfer. I love writing Javascript because it has a prosperous ecosystem and is quick to get my hands dirty. However, sometimes it's painful when the flow is not fast to follow due to the lack of a type system. To solve this, I wrote ESInfer, a statical inference tool, to automatically type check and generate type annotations for Javascript. It works with pure Javascript without any add-ons to the language or user-space code and supports highly dynamic features, such as the modification of prototypes. It is still in the very early stage, which offers…

    2022 · esinfer.com · its alternatives →

  8. 8

    Keep your clipboard safe from JS injections.

    2021 · chromewebstore.google.com · its alternatives →

  9. 9

    Find the origin of any character in the DOM

    2019 · fromjs.com · its alternatives →

  10. 10PM
  11. 11

    Check your website's SEO, analyze competitors and keywords

    2019 · serpstat.com · its alternatives →

  12. 12

    An open source guide to modern JavaScript features

    2017 · its alternatives →

  13. 13
    Flow▲74

    Static type checker to find errors in JavaScript programs

    2014 · its alternatives →

  14. 14

    VS Code extension for UT in JavaScript, TypeScript & Python

    2021 · circleci.com · its alternatives →

  15. 15

    Olaf - Acoustic fingerprinting on the ESP32 and in the Browser

    2020 · 0110.be · its alternatives →

  16. 16

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

    2017 · github.com · its alternatives →

  17. 17

    Find static code analysis tools and linters for Java, JavaScript, PHP, Python, Ruby, C/C++, C#, Go, Swift, and more. All tools and linters are peer-reviewed by fellow developers to select the best tools available. Avoid bugs in production, outages on weekends, and angry customers.

    2020 · analysis-tools.dev · its alternatives →

  18. 18

    JS Decorators library. Contribute to mako-taco/DecorateThis development by creating an account on GitHub.

    2015 · github.com · its alternatives →

  19. 19

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

    2021 · github.com · its alternatives →

  20. 20

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

    2016 · github.com · its alternatives →

  21. 21EA
  22. 22

    Hi Hacker News! We’re Vadim and Chris from Highlight.io [1]. We do web app monitoring and are working on using LLMs/embeddings to add new functionality to our error monitoring product. Given that there’s a lot of founders/engineers using LLMs in their products, we figured we’d share how we built the new functionality, their impact on our workflows, and how you can try it out. Our goal was to build two features: (1) tagging errors (e.g. deeming an error as “authentication error” or a “database error”); and (2) grouping similar errors together (e.g. two errors that have a different…

    2023 · github.com · its alternatives →

  23. 23

    Instant AI diff for text, code & JSON right in Chrome

    2025 · trust-fish.com · its alternatives →

  24. 24AF

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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 →