Every API tester tool wants you to install an app, create an account, or pay monthly. I built one that needs none of that.
What it does
API Tester Pro is a single HTML file. Open it in any browser and you have a full REST client:
- GET, POST, PUT, DELETE, PATCH support
- Custom headers (JSON format)
- Request body editor
- Response viewer with status codes + timing
- Zero dependencies, zero uploads
Why browser-based matters
- No install — works on any device with a browser
- No CORS issues — requests go directly from your browser
- No data leakage — nothing leaves your machine
- Instant — no loading screens, no updates
Try it free
The free version handles basic requests. No limits, no trial period.
Go PRO for $29
The PRO license unlocks collections, request history, environment variables, auth tokens, and export to cURL/code. One-time payment, lifetime access.
I also built 6 Python CLI tools and 13 other browser tools — all at pyfile-toolkit.github.io.
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