Generally website owners and bloggers use the free image hosting websites for uploading their images. The Process of Uploading any image is very simple. You have just to visit the image hosting website, select and browse to find an image from you pc or labtop that you want to upload and click upload. Then automatically image will be uploaded and the hosting website will generate a linking image URL which you can use anywhere to post that image.That url can be used in blogs, forums, message boards, emails, websites etc.I also use such image hosting websites for uploading my images.

These are some popular Image Hosting Sites ::

• ImageShack — In my opinion, ImageShack is best free image hosting provider. I also use its service for many of my websites and blogs. Each image you upload to ImageShack must be less than 1.5 MB in size. Images greater in size are resized automatically. Allowed Extensions :: .jpg, .jpeg, .gif, .bmp, .tif, .swf (flash) and .png. bmp, tif, and tiff images will be converted to .png automatically. Imageshack provides unlimited amount of space for storing your images. Direct linking to the image is allowed. No signup or registration required. For more features you have to register. Images that have not been accessed in over a year will be deleted. ImageShack allows each image 100 megabytes of transfer per hour. If the transfer exceed this limit, then image will become inaccessible.
• PhotoBucket — Upto 20 pictures are allowed at a time. Pictures can be categorized, given titles and deleted. Direct linking or Hot Linking is also allowed. Photos larger than 512 KB are automatically scaled down. Image uploads by mobile camera phone or via email message attachments are also possible. Allowed Extensions :: .jpg, .gif, .bmp, .tiff, .swf (flash) and .png image types. The uploader automatically converts bmp and tif formats to jpg
  Limitations: 50 MB storage space; 2500 MB/month bandwidth; 512 KB file size limit
• VillagePhotoes — Through free account you can upload maximum 25 images. Image can be uploaded directly from harddisk or through FTP. There is facility of giving photos titles and captions, resizing or compressing images. For this Free signup is required. GIF or JPG file formats supported. Limitations: File size limit 250KB; Monthly Transfer 600 MB; 90-days inactivity limit. It’s image hosting service is compatible with WebTV, eBay,MySpace, Yahoo Auctions and Stores, other auction sites, EZBoard etc.
• ImgPlace — Image Types Allowed: jpeg, jpg, gif, bmp, png, tif, tiff. Maximum file size: 1.5MB. Unlimited storage hosting period. Unlimited bandwidth. No registration required.
• ImgSpot– Photo Size limit is 650 KB. No signup is required. Unlimited photoes can be uploaded. Hotlinking is also allowed. Allowed Extensions:: .jpg, .png, .gif files. Unlimited Bandwidth and no expiry for images.
• ImageVenue — Users are allowed to upload up to 10 pictures at a time. Hotlinking is allowed. No registration is required. Allowed Extensions :: jpg, jpeg. Unlimited bandwidth and unlimited storage period. , Photo size limit is 1.5 MB; Hosted images which are not accessed for one year will be deleted.
• FreeImageHosting — They provide free image hosting service running on several dedicated linux web servers. Registration is not required, but creating an account lets you manage your pictures and use other extra features of the site. Adult rated images are not allowed and will be removed. Filename extensions allowed: gif, jpg, bmp, png. Filesize limit: 3,000KB