Dev tools · alternatives · 2026

Recompyle is a JavaScript debugging tool that combines console and debugger functionality for developers who find console.log impractical and traditional debuggers slow. It includes automatic file parsing that logs the… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Recompyle – A JavaScript developer-friendly console / debugger launched in 2023; newer entries below may have overtaken it.

1. 1AW
   A web debugger an ex-Cloudflare team has been working on for 4 years▲886

   Hey HN, I wanted to show you a product a small team and I have been working on for 4 years. https://jam.dev It’s called Jam and it prevents product managers (like I used to be) from being able to create vague and un-reproducible bug tickets (like I used to create). It’s actually really hard as a non-engineer to file useful bug tickets for engineers. Like, sometimes I thought I included a screenshot, but the important information the engineer needed was what was actually right outside the boundary of the screenshot I took. Or I'd write that something "didn't work" but the engineer…

   2024 · its alternatives →

2. 2
   ScrapScript – A tiny functional language for sharable software▲503

   Hi friends, I started casually working on scrapscript in 2015. I built a few compilers over the years to test out various ideas/implementations, and I think I'm finally happy with the overall design. The code is not public yet. Email me at [email protected] if you're interested in joining the core team later this year. Let me know if you have any questions or feedback :)

   2023 · scrapscript.org · its alternatives →

3. 3
   Fast.js – faster reimplementations of native JavaScript functions▲323

   Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

   2014 · github.com · its alternatives →

4. 4
   Uscope, a new Linux debugger written from scratch▲262

   Hi! I've been building a debugger on my nights and weekends because it's fun, and I personally need a better debugger for my work. GDB and LLDB pain me greatly; we can and will do better! As explained in the README, it's still very early-days and it's not ready for use yet, but check back often because it's improving all the time! Check out https://calabro.io/uscope for a more detailed explanation. Thanks for taking a look!

   2025 · github.com · its alternatives →

5. 5
   Sidekick▲263

   Like Chrome DevTools for your backend, now open source

   2022 · github.com · its alternatives →

6. 6
   Debugging-Friendly Tracebacks for Python▲123

   Debugging-friendly exceptions for Python. Contribute to cknd/stackprinter development by creating an account on GitHub.

   2019 · github.com · its alternatives →

7. 7DA
   Debuggify – Advanced error analytics for modern Javascript applications▲33

   2013 · debuggify.net · its alternatives →

8. 8
   Letting LLMs Run a Debugger▲147

   Hey HN, I just built an experimental VSCode extension called LLM Debugger. It’s a proof-of-concept that lets a large language model take charge of debugging. Instead of only looking at the static code, the LLM also gets to see the live runtime state—actual variable values, function calls, branch decisions, and more. The idea is to give it enough context to help diagnose issues faster and even generate synthetic data from running programs. Here’s what it does: * Active Debugging: It integrates with Node.js debug sessions to gather runtime info (like variable states and stack traces). *…

   2025 · github.com · its alternatives →

9. 9
   Debugger that generates video visualizations for algorithm learning▲102

   A simple Python debugger and profiler that generates animated visualizations of program flow, useful for algorithm learning. - CCExtractor/vardbg

   2020 · github.com · its alternatives →

10. 10
    BugStalker - a modern Rust debugger▲115

    Rust debugger for Linux x86-64. Contribute to godzie44/BugStalker development by creating an account on GitHub.

    2025 · github.com · its alternatives →

11. 11
    Twig▲77

    console.logs for cloud development

    2020 · twig.im · its alternatives →

12. 12
    hasty.dev▲146

    A JS Perfomance Tool

    2021 · hasty.dev · its alternatives →

13. 13WM
    We made an MCP server so Cursor can debug Node.js on its own▲139

    2025 · npmjs.com · its alternatives →

14. 14
    Leaping – Debug Python tests instantly with an LLM debugger▲120

    Hi HN! We’re Adrien and Kanav. We met at our previous job, where we spent about a third of our lives combating a constant firehose of bugs. In the hope of reducing this pain for others in the future, we’re working on automating debugging. We’re currently working on a platform that ingests logs and then automatically reproduces, root causes and ultimately fixes production bugs as they happen. You can see some of our work on this here - https://news.ycombinator.com/item?id=39528087 As we were building the root-cause phase of our automated debugger, we realized that we developed…

    2024 · github.com · its alternatives →

15. 15
    Sidekick - Live application debugger is now open source▲77

    Sidekick is a live application debugger that lets you troubleshoot your applications while they keep on running. It allows you to add dynamic logs and put non-breaking breakpoints in your running application without the need of stopping & redeploying. Currently supporting Java, Python & Node.js runtimes. Sidekick Open Source is here to allow self-hosting and make live debugging more accessible. Built for everyone who needs extra information from their running applications.

    2022 · github.com · its alternatives →

16. 16
    JavaScript port of Scientist library for refactoring critical paths▲34

    :microscope: A JavaScript interpretation of the Ruby library Scientist, a library for carefully refactoring critical paths. - bugthesystem/scientist.js

    2016 · github.com · its alternatives →

17. 17AC
    A complete Bash parser in JavaScript transpiled from Go▲89

    2018 · npmjs.com · its alternatives →

18. 18
    FlouState▲99

    I built FlouState because "4 hours of coding" tells you nothing. Was it 4 hours debugging or 4 hours building features? Very different. It's a VS Code extension that automatically categorizes your coding into: Creating (new features), Debugging (fixing issues), Refactoring (improving code), or Exploring (learning codebase). Example: Yesterday I "coded" 6 hours but it was actually 3.5h debugging a race condition, 1.5h refactoring, 0.5h tests, 0.5h exploring. Traditional time trackers just show "6 hours in TypeScript." Technical: Tracks file changes, debug sessions, and edit patterns locally.…

    2025 · floustate.com · its alternatives →

19. 19
    RootCause – Record, Replay and Reproduce JavaScript Errors▲98

    RootCause helps you track and reproduce javascript errors. You can replay user sessions to avoid extensive troubleshooting and fix application issues in no time.

    2018 · therootcause.io · its alternatives →

20. 20WB
    Web-based CoffeeScript REPL/console▲36

    2012 · larryng.github.com · its alternatives →

21. 21
    Refurb – A tool for refurbishing and modernizing Python codebases▲123

    A tool for refurbishing and modernizing Python codebases - dosisod/refurb

    2022 · github.com · its alternatives →

22. 22
    An experimental data-flow analysis tool for JavaScript▲95

    Find the origin of any character in the DOM

    2019 · fromjs.com · its alternatives →

23. 23
    Console Ninja▲24

    JavaScript console.log output and errors next to your code

    2022 · console-ninja.com · its alternatives →

24. 24
    Slowbug▲78

    Debug your code in slow-mo!

    2021 · 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 →