ImageShack is a subscription-based image hosting website headquartered at Los Gatos, California.

Although ImageShack always had a subscription service, the majority of its revenue was originally produced from advertising related to its free image hosting.

[1] In January 2014, ImageShack announced that it was switching to a subscription based service and would no longer offer free uploads.

Uploaded BMP and TIFF (TIF) images are automatically converted to PNG format.

After receiving feedback from users, Imageshack discontinued "hiding" the direct links and placed them on the top of the page.

[4] ImageShack also provides a standalone open-source application for users to upload images and videos.

[11] Yfrog was a service run by ImageShack designed specifically for uploading photographs and videos to Twitter.