Dev tools · alternatives · 2026

24 alternatives to guppy

The tinker tool for backend Javascript

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. guppy launched in 2021; newer entries below may have overtaken it.

1. 1
   NicheUtils: 40+ Free Dev Tools ▲9

   40+ dev tools that run 100% in your browser - no servers

   2025 · nicheutils.com · its alternatives →

2. 2
   MegaTools▲10

   Essential developer tools

   2025 · megatools.tech · its alternatives →

3. 3
   Free Tools for Developers▲12

   Essential free tools for developers, all in one place

   2024 · its alternatives →

4. 4
   DevTools▲18

   Collection of free online tools to help in web development

   2025 · onlinewebdevtools.com · its alternatives →

5. 5
   DevKit▲13

   27+ free developer tools | json, css, seo & more

   2025 · its alternatives →

6. 6
   ToolHexa – Free Online Tools▲6

   Free, fast & user-friendly tools — no sign up needed

   2025 · toolhexa.vercel.app · its alternatives →

7. 7
   HandyTools▲6

   15 free developer tools with a Windows 95 interface

   Jul 2026 · handytools.dev · its alternatives →

8. 8
   FreeDev Tools Online▲3

   100+ free developer tools — no login, no ads

   Jul 2026 · freedevtoolsonline.com · its alternatives →

9. 9
   ViteTools.dev▲10

   Free online developer tools & utilities

   Nov 2025 · its alternatives →

10. 10
    DevTab▲5

    110+ dev tools. One tab. Zero server calls.

    Jul 2026 · devtab.in · its alternatives →

11. 11
    ToolHover▲12

    Clean, free online utilities for text, QR, JSON & more.

    2025 · toolhover.com · its alternatives →

12. 12
    JavaScript Jabber▲6

    JavaScript, front-end development, community and careers.

    2016 · its alternatives →

13. 13
    Digital Toolpad▲8

    A suite of dev tools (YAML, JSON, Markdown, regex, csv, etc.) that run entirely in-browser – no tracking, all private.

    2025 · digitaltoolpad.com · its alternatives →

14. 14
    DevStack▲8

    Developer Tools

    2025 · devstack.tools · its alternatives →

15. 15
    DevUtils▲3

    25 free dev tools that run in your browser. No signup.

    Apr 2026 · tools.wasta-wocket.fr · its alternatives →

16. 16
    Tool Wizard Hub▲6

    Privacy-first, browser-native developer utilities.

    Dec 2025 · toolwizardhub.com · its alternatives →

17. 17
    JSON Knife▲4

    30 free developer tools. No ads, no signup, no BS.

    Feb 2026 · tools.shanecode.org · its alternatives →

18. 18
    Toolie▲6

    One-stop free online tools – json, text, numbers & more

    2025 · its alternatives →

19. 19
    Monkberry▲6

    A JavaScript library for building web user interfaces

    2016 · monkberry.js.org · its alternatives →

20. 20
    DevToys▲6

    40 essential developer tools in one clean, ad-free bookmark.

    Jul 2026 · devtoys-nu.vercel.app · its alternatives →

21. 21
    NapTools▲3

    28 free browser tools for devs. No login, no limits.

    Jun 2026 · naptools.vercel.app · its alternatives →

22. 22
    DevNestTools▲2

    Fast, free dev tools that run 100% client-side no signup

    Aug 2026 · devnesttools.com · its alternatives →

23. 23
    DevTools ▲3

    9 free dev tools in one tab — JSON, JWT, Regex & more

    Jun 2026 · jsonviewer.live · its alternatives →

24. 24
    ToolsStack▲2

    21 free dev tools, all client-side. No uploads.

    Jun 2026 · toolsstack.org · 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 →