FileUp vs Gyazo

FileUp is a self-hosted, open-source temporary file-upload and sharing service built on .NET, offering a public REST API for anonymous uploads with configurable expiry times and view limits. A live OPTIONS preflight with an Origin header against the maintainer's own running instance, upload.sinasnp.com/api/public/upload, returned a 204 with no Access-Control-Allow-Origin header, resolving cors from unknown to no; the public upload endpoint requires no auth (only the separate admin panel uses Basic Auth), and HTTPS was reconfirmed. It's a free, open-source project with no paid tier.

Gyazo is a screenshot and screen-capture sharing service whose API lets apps upload images and GIFs and fetch a user's capture history. A live GET against the real gateway, api.gyazo.com/api/images, returned a 401 without a token, reconfirming API-key auth over HTTPS, and a follow-up OPTIONS preflight returned Access-Control-Allow-Origin: *, resolving cors from unknown to yes. The free tier covers everyday screenshot sharing, while a paid Gyazo Pro plan adds unlimited uploads, higher-res captures, and privacy controls.