API & Webhook Tools

Build REST API endpoint URLs with path parameters, query parameters, and custom headers. Enter a base URL, define path parameters with dynamic segments (/:id), add query parameters, and set custom headers with auto-encoding - all processed locally in your browser. Free online REST API endpoint builder, no signup required.

Mock API responses with custom status codes, headers, and body content. Choose from 19 HTTP status codes, write response bodies in JSON/XML/HTML/text/JavaScript, add custom headers with one-click CORS support, and simulate network latency up to 5 seconds - all processed locally in your browser. Free online API response simulator, no signup required.

Generate XML sitemaps from a list of URLs with custom changefreq, priority, and lastmod settings. Add URLs individually or via bulk import, configure per-URL options, and instantly generate a valid sitemaps.org-compliant XML file with live validation against protocol limits (50K URLs / 50MB). Copy or download - all processing happens locally in your browser. Free online sitemap generator, no signup required.