File.io vs Gyazo

File.io is an anonymous, one-time file-transfer service: uploaded files get a short-lived link that self-destructs after a configurable number of downloads, with a simple REST API returning JSON for uploads and deletions. A live OPTIONS preflight with an Origin header against the real host, www.file.io, returned a 403 with no Access-Control-Allow-Origin header, resolving cors from unknown to no; no API key is required for basic use, and HTTPS was reconfirmed. A free anonymous tier covers casual transfers, while a paid plan raises file-size limits and adds account-based management.

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.