Disclosure: LeptonGUI is a tool I've developed. That makes it difficult for me to be unbiased, and so I'll tell you what the program does, but not try to assess how well it does it.
Lepton is an open-sourced Dropbox technology for the lossless compression of JPEGs.
The program can compress JPG files by 20% or more, exporting the results in a LEP format (picture.jpg > picture.lep). Point the program at LEP files later and it restores the original JPG file, byte for byte.
The standard Lepton.exe runs only from the command line, and can behave strangely if you don't run it in just the right way. Experienced users won't have any trouble with it, but we've also put together a very basic front end that might be easier to use.
Operations are much like any other conversion tool. Drag and drop your source files, JPG or LEP, or click Open and choose whatever you need, and click Convert to process them (JPGs become LEP, LEPs are restored to JPG).
The program won't overwrite the destination file. This is intentional, as I don't completely trust Lepton to work in all circumstances, and I don't want there to be any risk of losing data.
When you're done, LeptonGUI displays the individual savings for each file and the overall compression rate.
Verdict:
LeptonGUI is a very basic front end for Lepton, but it doesn't add any other functionality. Try it if you'd like to add drag and drop support, otherwise stick with the command line build.
Your Comments & Opinion
Compress JPGs by 20% or more
Compress images, Office documents, archives, executable files and more with this lossless optimisation tool
A full-featured archive creator/ manager
Compress your JPEGs by up to 20%
Cut JPEG file sizes, without losing image quality
Enjoy digital and internet TV and radio with this one-stop entertainment system
Enjoy digital and internet TV and radio with this one-stop entertainment system
Right images via Windows’ context menu
Audacious is a lightweight audio player that focuses on doing one job well
Audacious is a lightweight audio player that focuses on doing one job well