Convertio - File Conversion in the Cloud
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youconvertit - Youconvertit - Free Online Files Converter, convert any type of file formats, convert media, images, audio, video. All file converted can be shared for free.
Optimage - Advanced image optimization tool
File Converter - Convert & compress everything in 2 clicks!
Kraken.io - Kraken is a robust, ultra-fast image optimizer. Thanks to its vast array of optimization algorithms Kraken is a world ahead of other tools. Want to save bandwidth and improve your website's load times? Look no further and welcome to Kraken!