I Built a Free In-Browser API Tester — No Postman Install Needed

We’ve all been there — you just need to fire a quick API request
to check a response, but your options are:

Boot up Postman (and wait for that Electron app to load 🐢)
Install a VS Code extension just for this
Remember the exact curl syntax you alway…


This content originally appeared on DEV Community and was authored by Puneet Sharma

We've all been there — you just need to fire a quick API request
to check a response, but your options are:

  • Boot up Postman (and wait for that Electron app to load 🐢)
  • Install a VS Code extension just for this
  • Remember the exact curl syntax you always forget

I got tired of it, so I built a lightweight API request
tester that runs entirely in your browser.

What it does

API Request Generator & Tester

  • Choose your HTTP method (GET, POST, PUT, DELETE, PATCH)
  • Set custom headers
  • Pass a request body (JSON, form data)
  • Inspect the response — status, headers, body
  • Zero install. Zero sign-up. Just open and use.

It's essentially a no-friction Postman alternative for when
you just need to poke at an endpoint quickly.

Why browser-based?

The goal was to remove every possible barrier between
"I need to test this" and actually testing it. No app to
install, no account to create, no workspace to configure.
Open the URL, test your API, move on.

There's more

The API tester is part of a growing collection of free
web dev tools I've been building at
tools.webdevpuneet.com —
all free, all in-browser.

Try it out

👉 tools.webdevpuneet.com/api-request-generator-tester

I'd love to hear what features you'd want added —
drop them in the comments below!``


This content originally appeared on DEV Community and was authored by Puneet Sharma


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APA

Puneet Sharma | Sciencx (2026-04-25T06:19:20+00:00) I Built a Free In-Browser API Tester — No Postman Install Needed. Retrieved from https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/

MLA
" » I Built a Free In-Browser API Tester — No Postman Install Needed." Puneet Sharma | Sciencx - Saturday April 25, 2026, https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/
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Puneet Sharma | Sciencx Saturday April 25, 2026 » I Built a Free In-Browser API Tester — No Postman Install Needed., viewed ,<https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/>
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Puneet Sharma | Sciencx - » I Built a Free In-Browser API Tester — No Postman Install Needed. [Internet]. [Accessed ]. Available from: https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/
CHICAGO
" » I Built a Free In-Browser API Tester — No Postman Install Needed." Puneet Sharma | Sciencx - Accessed . https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/
IEEE
" » I Built a Free In-Browser API Tester — No Postman Install Needed." Puneet Sharma | Sciencx [Online]. Available: https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/. [Accessed: ]
rf:citation
» I Built a Free In-Browser API Tester — No Postman Install Needed | Puneet Sharma | Sciencx | https://www.scien.cx/2026/04/25/i-built-a-free-in-browser-api-tester-no-postman-install-needed/ |

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