API Tester
A postman-like HTTP client to test REST APIs, send requests, and inspect responses.
Enter URL and click Send to get a response
How to Use API Tester
- Select or input your source files/data into the editor workspace above.
- Customize configuration settings, target formats, quality levels, or parameters.
- Inspect instant live previews, comparisons, or validated outputs.
- Click the download or copy button to export your final processed results.
Why Use DevLoom's API Tester?
- 100% Client-Side Privacy: Zero server uploads. Your data stays on your machine.
- Instant Performance: Powered by modern Web APIs and WebAssembly.
- Zero Cost: Forever free, no subscriptions, and no hidden limits.
Frequently Asked Questions
What is the API Tester tool used for?
The API Tester is a free online utility designed to a postman-like http client to test rest apis, send requests, and inspect responses. It processes data fast and runs 100% inside your web browser.
Is my data private and secure when using API Tester?
Yes, 100%. All processing is performed locally on your device via client-side JavaScript. None of your data, images, files, or text are ever uploaded, saved, or logged on external servers.
Is API Tester free to use?
Yes! API Tester on DevLoom is completely free with no usage limits, no trial periods, and no account signup required.