SageThumbs

SageThumbs is a powerful shell extension allowing to preview enormous amount of image formats directly in Windows Explorer by using Pierre-e Gougelet's GFL library...

Free Open Source Windows Windows Explorer

XnConvert

XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux. It supports more than 400 file formats (jpeg, tiff...

Free Mac Windows Linux

FastStone Photo Resizer

Convert and Rename images in batch mode Support JPEG, BMP, GIF, PNG, TIFF and JPEG2000 Resize, crop, change color depth, apply color effects, add text, watermark...

Free Personal Windows

Image Resizer for Windows

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

Free Open Source Windows Windows Explorer

Image Tuner

Image Tuner is a free software for batch resizing, converting, watermarking and renaming your digital photos and images from more than 20 image formats to JPEG, BMP...

Free Personal Windows

Converseen

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...

• Warning Installation without activation key works showing different dangerous 3rd party softwares (bloatware, spyware, etc.). Avast Antivirus detected at least 3 different kind of viruses (or potentially viruses/dangerous software).

Free Open Source Windows Linux

Pictus

Pictus is a fast, free image viewer that enables Windows to see thumbnails of supported formats, such as PSD. Give it a spin today! Pictus is a fast, free image...

• Discontinued Last updated in 2008. See https://poppeman.se/pictus/

Free Open Source Windows Windows Explorer

PicaView

PicaView is the simple, no-hassle image viewing solution. This is an add-on for viewing images in http://alternativeto .

• Discontinued The product is no longer available on the official website, but you can still download it from OldVersion.com

Free Windows Windows Explorer

FCorp Imaging

Imaging is a Collection of Image Related Tools (Image Viewer, Image Converter, Image Resizer, Image Optimizer, etc). Features : 1. Color Picker 2. Duplicate Image...

• Discontinued The program is no longer developed. Last version, released in July 2016, can be still bought from the official website.

Commercial Windows

Free Image Convert and Resize

Free Image Convert and Resize is a compact yet powerful program for batch mode image processing. The program easily converts separate images as well as file folders...

Free Windows

FastPreview

FastPreview was created in need of a usable PicaView replacement which was discontinued at the time.

Free Windows Windows Explorer

Photo Size Optimizer

A powerful photo resizer and optimizer for Mac, allows you to optimize all your photos by 80% ~ 20% comparing to their originals while keeping their original resolution...

Freemium Mac

FirmTools ShellExtension

FirmTools ShellExtension is a real handy freebie for Windows users. Install this tool and it will add three new options to your menu when you right click on a picture...

• Discontinued Last Release date: Sep 07, 2005. See http://free.firmtools.com/shellextension.php

Free Windows Windows Explorer

Tinuous

An image converter batch-processing multiple files. JPEG lossless transformations are implemented. Options are shrink, rotation, correction, output file name setting...

Free Windows

CoolTweak

Resize, add watermarks and share your pictures with a single click. CoolTweak is a nice tool that expands the use of right-click menus on the OS level with actions...

Free Windows