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

Puneet Sharma — Sat, 25 Apr 2026 06:19:20 +0000

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!``

DEV Community: Puneet Sharma

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

What it does

Why browser-based?

There's more

Try it out