ShareX

ShareX is a free and open source screen capture, screen recording, and file sharing app for Windows. It lets you capture or record any area of the screen with a single key press and then send screenshots, images, text, and other files to chosen destinations.

It supports region capture, scrolling screenshots, OCR, image annotation, GIF recording, color picking, and custom uploader workflows. Command line arguments and keybinds are available, along with actions for automating capture and upload steps.

ShareX is a free, GPL-3.0 licensed desktop app for Windows, installable from its site or the Microsoft Store. After capture, it can run image effects and annotations, then upload to a wide range of destinations including Amazon S3, Google Cloud Storage, and Cloudflare R2. Custom uploaders let you target any service that accepts an HTTP request.