ZumiFiles CORS Helper

Transparently proxies local /api/download?url=... requests for ZumiFiles to enable cross-origin remote file previewing.

ZumiFiles CORS Helper is a single-purpose developer utility companion for ZumiFiles (https://zumilabs.com/tools/zumifiles/). When loading remote files (such as 3D models, PDF documents, or CSV spreadsheets) via public URLs, strict browser Cross-Origin Resource Sharing (CORS) rules often prevent web applications from reading file streams directly. ZumiFiles CORS Helper uses Chrome's native Declarative Net Request engine to add permissive CORS headers (`Access-Control-Allow-Origin: *`) exclusively to HTTP requests initiated by ZumiFiles (`zumilabs.com`, `localhost`, and `127.0.0.1`). Key Features: - Seamless Remote File Previewing: Load remote 3D models (.glb, .obj), PDFs, images, and spreadsheets directly into ZumiFiles. - Scoped Initiator Rules: Header modifications and download redirects only apply to requests initiated by ZumiFiles domains (`zumilabs.com`, `localhost`, `127.0.0.1`). - Zero Data Storage & Tracking: Does not store, track, log, or transmit any user browsing activity or file data. - High Performance: Operates purely via Chrome's native declarative net rules without background service worker overhead. How to Use: 1. Install ZumiFiles CORS Helper. 2. Open ZumiFiles (https://zumilabs.com/tools/zumifiles/). 3. Click "Load Remote URL" and paste any public file link. ZumiFiles will fetch and render the remote file instantly! Privacy Guarantee: ZumiFiles CORS Helper operates completely locally inside your browser. It does not collect, store, or transmit personal data or browsing activity to any external server. Support & Feedback: For technical support or bug reports, contact ZumiLabs at help@zumilabs.com or visit https://zumilabs.com/tools/zumifiles/.