100% Free · Privacy-First · Offline-Capable
Free API tester built for local-first workflows
Free API tester with a Postman-like workflow. Send REST requests, inspect headers and payloads, and debug endpoints in a privacy-first browser tool. Keep API payloads, tokens, and headers out of third-party request logs while testing locally. Core request authoring and collection workflows are offline-capable, so you can prepare and review tests anywhere.
Why teams use this free tool
Replace upload-heavy utilities with a focused local workflow.
Test APIs with a Postman-like interface.
Keep API payloads, tokens, and headers out of third-party request logs while testing locally.
Core request authoring and collection workflows are offline-capable, so you can prepare and review tests anywhere.
Core Features
REST request builder with methods, params, headers, and body modes
Collection-style request organization for repeat workflows
Response inspection with status, headers, timing, and payload
Local persistence for test requests without cloud lock-in
Alternative Search Intent Coverage
This tool is optimized for users looking for faster alternatives to heavyweight clients. If you are searching for a Postman alternative, Insomnia alternative, or Bruno alternative, this free local workflow gives you request testing essentials without extra account setup.
Frequently Asked Questions
Is this a good Postman alternative for quick tests?
Yes. API Tester covers common request/response workflows and is useful when you want a lighter, browser-native alternative to Postman.
How does API Tester compare with Insomnia and Bruno?
API Tester focuses on fast, local request testing in-browser. It works well for developers who want private, no-install workflows similar to Insomnia and Bruno use cases.
Can I test authenticated APIs?
Yes. You can add auth headers, custom params, and body payloads to validate protected endpoints.