Dev tools · alternatives · 2026

JSONP is a developer tool that enables cross-domain requests to JSON APIs using AJAX. Launched in 2012, it addresses the browser's same-origin policy limitation by allowing developers to retrieve data from external… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. JSONP - enable cross-domain requests to any JSON API (w/ AJAX) launched in 2012; newer entries below may have overtaken it.

1. 1TW
   This website is valid JSON▲604

   2020 · webdatarender.com · its alternatives →

2. 2
   JSON Api▲175

   Hosted API's to develop your app for free 🙌

   2020 · jsonapi.co · its alternatives →

3. 3JA
   Jam API, turn any site into a JSON api using CSS selectors▲300

   2016 · jamapi.xyz · its alternatives →

4. 4JI
   JSON.is▲100

   2016 · json.is · its alternatives →

5. 5JB
   JSON Browse – Fetch, filter and manipulate your JSON inside the browser▲138

   2017 · jsonbrowse.com · its alternatives →

6. 6
   JSON Web Container▲176

   Take any HTML and plug it into native app with JSON markup

   2017 · jasonette.com · its alternatives →

7. 7
   jsonbox.io▲200

   A free HTTP based JSON Storage.

   2019 · jsonbox.io · its alternatives →

8. 8
   JSON Query▲154

   I'm working on a tool that will probably involve querying JSON documents and I'm asking myself how to expose that functionality to my users. I like the power of `jq` and the fact that LLMs are proficient at it, but I find it right out impossible to come up with the right `jq` incantations myself. Has anyone here been in a similar situation? Which tool / language did you end up exposing to your users?

   Oct 2025 · jsonquerylang.org · its alternatives →

9. 9
   JSONverify▲92

   A web tool that validates and format JSON objects

   2021 · jsonverify.com · its alternatives →

10. 10
    JSON5 — modern JSON▲64

    JSON5 — JSON for Humans. Contribute to json5/json5 development by creating an account on GitHub.

    2012 · github.com · its alternatives →

11. 11GJ
    Generate JSON mock data for testing/initial app development▲103

    Easily create complex JSON data structures using intuitive templates.

    2023 · jsongenerator.io · its alternatives →

12. 12
    JsonMap▲5

    JSON into interactive graphs and trees

    Feb 2026 · jsonmap.com · its alternatives →

13. 13
    JSON Editor 1.0▲78

    Effortless JSON Editing, Anywhere!

    2023 · chromewebstore.google.com · its alternatives →

14. 14
    a small weekendish project - JSON Blob▲106

    2013 · jsonblob.com · its alternatives →

15. 15JS
    JSON Serve – Your JSON, Your Domain, No Server Required▲8

    Just made a new utility site to simply serve JSON directly from your custom domain without needing a server. This service aims to help developers who need quick and reliable JSON hosting for various use cases. We also support hosting on our subdomains, if you don't yet own a domain. Use Cases: * API Testing: Quickly set up endpoints for testing and debugging, by just changing the domain. * Prototyping: Rapidly iterate and test your ideas. * Mobile App Devs: Serve data without the headache of server management. * Static Sites and Demos: Host JSON for static websites and demonstrations. * Stub…

    2024 · json-serve.com · its alternatives →

16. 16GM
    GetJSON, make ajax requests to anywhere▲7

    GetJSON is a quick weekend hack - a proxy service that fetches whatever you specify and returns it wrapped in a JSONP request. This makes it easy for in-browser JS to fetch data even from services which don't support JSONP or "Access-Control-Allow-Origin: *" header, without running your own proxy service. Link: http://getjson.net/

    2011 · getjson.net · its alternatives →

17. 17
    A simple API to store and retrieve JSON objects▲18

    2015 · openbucket.io · its alternatives →

18. 18JA
    JSONScript – Asynchronous scripting language using JSON format▲49

    2016 · json-script.com · its alternatives →

19. 19
    JSONSift▲10

    Free developer tools that run entirely in your browser

    Jun 2026 · jsonsift.com · its alternatives →

20. 20
    JSON-to-JSON mapping done easily▲14

    2019 · github.com · its alternatives →

21. 21
    Jsonviewer▲9

    JSONNinja – A Next‑Gen JSON Viewer for Developers

    2025 · v2.jsonninja.tools · its alternatives →

22. 22TA
    Turn any website into an API HackMIT 2013▲36

    Select anything on a website. If it is part of a table or a list, you get a URL which you can GET for a JSON representation of that list or table. Basically we are making an API for every website whether they like it or not.

    2013 · ec2-54-211-79-18.compute-1.amazonaws.com · its alternatives →

23. 23
    JSONeer▲8

    a platform for creating and fetching JSONs effortlessly

    2025 · its alternatives →

24. 24
    JSONBason▲15

    I've been at it again, just sharing my simple JSON data inspection tool, love webdev and single page apps, this one took 4 days and was a lot of fun. The code is not obfuscated so you can inspect it and see how it works (very simple, server side is even more simple) Pretty much just do a POST of your JSON data from within your code and it will convert it into a basic table for instant search and sort. Made with love for the fun of it, no ads, no paid anything, it's totally free. Please only send in sanitized/test data only, this is meant to help make webdev a bit easier and more fun.…

    2025 · jsonbason.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 →