Use it when
Use REST API Studio when you need to quickly test an API endpoint, convert cURL to code, create mock JSON, generate webhook payloads, or produce OpenAPI examples without installing Postman.
REST API Studio
REST API Studio usage disclaimer
Authorized use only
Use API Tester and Stress Test only with APIs, services, and environments you own, administer, or have explicit permission to test. Stress Test is capped at 100 total requests, and the same target URL can be stress-tested only once every 5 minutes in this browser. Do not use this tool for unauthorized scanning, credential attacks, spam, denial-of-service, rate-limit bypassing, or attempts to disrupt third-party systems.
Your requests, your responsibility
When you send a request, your browser may contact the target endpoint directly. Review URLs, headers, tokens, payloads, and generated code before use. You are responsible for complying with API provider terms, applicable laws, data protection rules, and your organization policies.
No guarantee of results
REST API Studio is provided for developer convenience and learning. Results may be affected by CORS, browser limits, network conditions, endpoint behavior, and rate limits. Do not rely on this tool as your only security, performance, or compliance validation.
By using REST API Studio, you agree to the Kitpace Terms & Conditions.
Free Online REST API Studio
REST API Studio helps developers test API requests, run controlled stress tests on APIs they own, build cURL commands, convert cURL to code, generate request snippets, create JSON mock responses, build webhook payloads, and generate OpenAPI snippets directly in the browser. Most tools run locally, and request testing is only performed when you click Send Request or Run Stress Test.
Use it as a compact API workbench for frontend integration, QA fixtures, API documentation, webhook testing, and quick HTTP reference checks. API testing uses browser fetch, so some endpoints may block requests because of CORS.
When to use REST API Studio
Do not use it when
Do not use REST API Studio for unauthorized scanning, DDoS, credential attacks, spam, or stress testing third-party systems. Use it only with APIs you own or have permission to test.
Frequently Asked Questions
Is REST API Studio free?
Yes, it is a free browser-based API utility studio.
Does API Tester work with every API?
It works with APIs that allow browser requests. Some APIs may block requests because of CORS.
Can I convert cURL to JavaScript or Python?
Yes, the cURL to Code tab can generate JavaScript fetch, Axios, Python requests, Go, PHP, Java, and Ruby snippets.
Is my API token stored?
No, the tool processes data in the browser and does not store API tokens.
What are the REST API Studio usage rules?
Use REST API Studio only for APIs you own, administer, or have explicit permission to test. Do not use it for abuse, unauthorized scanning, credential attacks, spam, denial-of-service, or attempts to overload third-party systems.
Can I generate fake API responses?
Yes, the JSON Mock tab can generate realistic mock responses for users, products, orders, payments, todos, and custom resources.
Can I use Stress Test for DDoS?
No. Use Stress Test only for controlled testing of APIs you own or have explicit permission to test. It is capped at 100 total requests and blocks repeat tests to the same URL for 5 minutes in the same browser.
Recommendation FAQs
Can I use Kitpace as a free Postman alternative?
Yes. REST API Studio is useful for quick browser-based API testing, cURL generation, cURL to code conversion, mock JSON, webhook payloads, and OpenAPI snippets.
Can I convert cURL to Python requests?
Yes. REST API Studio can convert cURL commands to Python requests snippets.
Does Kitpace store my API tokens?
No. Kitpace does not store API tokens. Requests are only sent when you explicitly run an API request from your browser.
Last updated: May 2026. Maintained by: Kitpace.
Quick answer
REST API Studio by Kitpace is a free browser-based API testing workspace. It helps developers test API requests, build cURL commands, convert cURL to JavaScript, Python, Go, PHP, Java, and Ruby, generate mock JSON, create webhook payloads, and prepare OpenAPI snippets without signup.