FastStone Image Viewer is a free, robust image browser, viewer, converter, and editor that supports all major graphic formats.

Mass Image Compressor efficiently compresses and resizes multiple images simultaneously.

Adobe DNG Converter (Digital Negative) allows camera-specific raw files to be converted to a universal DNG raw file.

TweakNow ImageConverter batch-converts image files between various formats, including HEIC/HEIF, AVIF, WEBP, GIF, JPEG, JPEG XL, PNG, and can compile them into a PDF.

Converseen is a powerful and free, cross-platform batch image processing tool that allows users to efficiently manage and manipulate multiple images simultaneously with just a single click. 32-bit is also available.

Converseen is a free cross-platform batch image processor for Windows, Linux, and Mac that allows you to convert, resize, rotate, and flip multiple images with a mouse click. Available for 64-bit.

VOVSOFT Batch Image Upscaler gives you a straightforward AI-powered tool that will enhance and upscale images in bulk.

XnView MP Portable is a multiplatform tool for viewing, converting, organizing, and editing images and videos. Installer, Linux and Mac versions are also available.

VOVSOFT OCR Reader is designed for digitizing image files and scanned documents, all through a lightweight, user-friendly tool.

XnView MP is a cross-platform image viewer used to view, convert, organize, and edit graphical & video files.

VOVSOFT WEBP Converter easily converts images from JPEG, PNG, TIFF, GIF, and BMP formats to WebP or converts WebP files to JPEG, PNG, TIFF, GIF, and BMP formats.

Spills (formerly PhotoSpills) lets you turn your digital photo collection into creative collages, posters, and photo layouts with almost zero effort.

VOVSOFT Batch Image Converter allows speedy batch conversions between graphic formats.

Light Image Resizer gives you the power to resize pictures or convert them into different formats easily and accurately.

Caesium can reduce the size of pictures by up to 90%, preserving the original visual quality.

XnConvert Portable is a tool created by the author of XnView and XnView MP, designed to make image conversion simple. Available as an installer and for Mac and Linux.

XnConvert was developed to be a simple yet powerful tool that allows you to convert images easily. From the author of the popular XnView and XnView MP. Portable version is also available.

PhotoResizerOK permits fast and efficient photo size reduction.

FotoSketcher is a free program that can help you convert your digital photos into art, automatically.

NConvert is batch conversion software for graphics files. From the author of the popular XnView.

VOVSOFT Batch Image Resizer allows batch image resizing through a straightforward interface and process.

Batch HEIC to JPG Converter allows you to easily and quickly convert multiple HEIC or HEIF image files to JPG, PNG, and other popular image formats.

DocuFreezer is a free application that converts your documents and images to PDF, TXT, JPG, TIFF, or PNG formats, "freezing" the look of the input documents and protecting them from any amendments.

SoftOrbits Batch Picture Resizer is designed for quick and easy batch photo resizing and more.

ImBatch is a free image processing tool that can convert, resize, rotate as well as perform other operations on multiple images in a single operation.