If you’re a fan of tumblr picture blogs then your more than likely came across the issue of downloading images files that saved as a htm or html instead of jpg depending on your windows operating system. When you browse the folder where the htm/html files are located you cannot view them unless you manually rename them to jpg. I find that to be time consuming, just imaging manually renaming 100+ files. Being frustrated i downloaded numerous file renamer applications and converters from cnet website but none of them did the job i was looking for. With thousands of htm/html files sitting on my hard drive i decided to hire a freelancer to code a desktop application which would complete the task of renaming my html files to .jpg. Below You will find a youtube video tutorial on how to use the Tumblr file renamer, a screen shot of the application in question and also a download link.