Thumbnail creation can be easy through some online quick thumbnail creators. If you don’t have a tool installed in your system for thumbnail creation, nothing to worry. You can get your thumbnail instantly.
Similar sites to generate thumbnails:
You can upload your image and select your preferences for the thumbnail size. You can get multiple images in different sizes instantly
Similarly MakeThumbanil.com website is a free thumbnail generator.
Free Watermark thumbnail generator
This is a simple online tool to generate thumbnail images.
Thumbalizr is an online tool to generate screenshots of web pages. You can simply paste URL and can get thumbnails.