Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files.


Image Convert Ninja is described as 'Powerful and intuitive online tool for viewing, resizing, cropping, and converting images. It supports all major formats, including AVIF, WebP, HEIC/HEIF, TIFF, and 32-bit HDR/EXR. Enjoy the unique Live Preview feature that lets you see real-time conversion results before downloading!' and is a Image Optimizer in the photos & graphics category. There are more than 50 alternatives to Image Convert Ninja, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and Android apps. The best Image Convert Ninja alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try IrfanView or XnView MP. Other great sites and apps similar to Image Convert Ninja are Image Toolbox, FastStone Image Viewer, XnView Classic and VERT.sh.
Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files.


CloudConvert is a online file conversion tool. more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.


Converseen is a free cross-platform batch image processor for Windows and Linux that allows you to convert, resize, rotate and flip an infinite number of images with a mouse click.



Image Normalizer is a cross-platform command-line batch-processing tool that resizes and compresses images, transforming each image by:

Batch process photos with resizing, cropping, color adjustments, text or watermark overlays, preview changes before saving, automate renaming with custom patterns, support for major formats, folder structures, preset settings, and drag-and-drop management.

Create email-friendly images, resize in batches, convert formats, and compress using high-quality filters. Integrated in Windows Explorer, it offers high-res settings, watermarking, a profiles library, PDF creation, and supports devices like iPad and iPhone.




Easy tool to convert files online. More than 309 different document, image, spreadsheet, ebook, archive, presentation, audio and video formats supported.

YOGA Image Optimizer is a free tool to convert and optimize JPEGs, PNGs and WebP image files. Simply Drag & drop images, click on “Optimize”, and you're done!

Image Resizer for Windows is a utility that lets you resize one or more selected image files directly from Windows Explorer by right-clicking.


Experimental, fast Web PNG/JPG optimizer which offer lossless, visually lossless or lossy compression. it performs image reductions over iterations thanks to recursive multi-processing and multithreading systems.

ReaConverter is time-saving batch image converter software that supports more than 700 source formats and over 60 output formats.



Instantly convert image files and multi-page PDFs to JPEG using a Mac-exclusive app. Features advanced control for resizing, compression, batch processing, and support for multiple formats and workflows, all through an intuitive drag-and-drop Dock interface.


