1. Optimizilla is an online image optimizer uses a smart combination of best optimization and lossy compression algorithms in order to shrink JPEG and PNG pictures to the minimum possible size while keeping the required level of quality.

  2. Convert multiple images, photos, and pictures between 30+ formats: JPG, PNG, GIF, TIFF, BMP, JP2, J2K, TGA, PSD, RAW, DDS, PNM, WMF, ICO, SGI, HDR, LBM

  3. PearlMountain JPG to PDF Converter is an easy to use Image to PDF Converter, which can easily batch convert your images to PDF files.

  4. Apowersoft Free HEIC Converter is a web-based application that helps to convert HEIF (.