Image Converters

Oftentimes you’ll encounter a situation where a photo or image needs to be smaller to fit into an upload of an assignment or as an attachment for an email. In this case, converting images from lossless formats such as PNG to lossy formats like JPG can be your best bet. Software such as IrfanView and XnConvert will facilitate this.

IrfanView
970 likes
Fast and powerful image viewer, editor, and converter for beginners and pros. Supports various formats, batch processing, and many extensions.
Image Viewer
Free Personal • Proprietary
Windows
PortableApps.com
License model
Free Personal • Proprietary
Application types
Image Viewer
Image Editor
Country of Origin
Bosnia & Herzegovina
Platforms
Windows
PortableApps.com
+33
Properties
Lightweight
Features
Batch conversion
Portable
Image Navigation
Extensible by Plugins/Extensions
Batch Rename Files
Ad-free
Command line interface
Convert images to PDF
No registration required
Works Offline
Dark Mode
Lossless Compression
Best alternatives are XnView MPandnomacs146 alternatives
XnView MP
378 likes
Comprehensive photo management software for viewing, batch converting, editing and resizing images and creating thumbnail sheets.
Image Viewer
Free Personal • Proprietary
Mac
Windows
Linux
License model
Free Personal • Proprietary
Application types
Image Viewer
Photo Manager
Country of Origin
France
EU
Platforms
Mac
Windows
Linux
Top XnView MP Features
Media library
Batch image manipulation
Batch Editing
Thumbnails
Ad-free
File Tagging
Works Offline
Portable
Batch Rename Files
Dark Mode
No Tracking
No registration required
Best alternatives are IrfanView139 alternatives
File Converter
147 likes
File Converter is a very simple tool which allows you to convert and compress one or several file(s) using the context menu in Windows Explorer.
Video Converter
Free • Open Source
Windows
File Explorer
License model
Free • Open Source
Application types
Video Converter
Audio Converter
Platforms
Windows
File Explorer
Properties
Lightweight
Features
Windows Explorer Extension
Built-in Media converter
Presets
Shell integration
Portable
Works Offline
Ad-free
File conversion
Built-in Image converter
Convert video to audio (mp3)
Best alternatives are HandBrakeandFFmpeg269 alternatives
Image Toolbox (Resizer)
42 likes
Image toolbox is the app which based on modern tech stack using Clean Architecture. It has features like filters applying, cropping, EXIF editing, quality and output image type picking and tons of another options.
Image Optimizer
Free • Open Source
Android
F-Droid
License model
Free • Open Source
Application types
Image Optimizer
Image Converter
Platforms
Android
F-Droid
Properties
Lightweight
Privacy focused
Features
Image resizing
Crop images
Works Offline
Ad-free
Image Comparison
Remove EXIF Data
No Tracking
No registration required
Batch processing
Batch Editing
Dark Mode
Remove Image Background
Best alternatives are Caesium Image Compressor64 alternatives
ImageMagick
194 likes
ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
Image Optimizer
Free • Open Source
Mac
Windows
Linux
iPhone
iPad
Xfce
License model
Free • Open Source
Application types
Image Optimizer
Image Converter
Country of Origin
United States
Platforms
Mac
Windows
Linux
iPhone
iPad
Xfce
Top ImageMagick Features
Batch processing
Image Processing
Batch image manipulation
Command line interface
Works Offline
No registration required
No Tracking
Ad-free
Watermarking
Geotagged Photos
Convert heic to png
Best alternatives are File ConverterandJPEGView76 alternatives
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XnView Classic
438 likes
XnView Classic is an efficient image viewer, browser and converter for Windows with built-in support for over 500 image formats.
Image Viewer
Free Personal • Proprietary
Windows
PortableApps.com
ReactOS
License model
Free Personal • Proprietary
Application types
Image Viewer
Image Editor
Country of Origin
France
EU
Platforms
Windows
PortableApps.com
ReactOS
Properties
Lightweight
Features
Batch conversion
Batch Rename Files
Built-in viewer
Image resizing
Portable
Works Offline
No registration required
Batch Editing
RAW Photo Editors
Ad-free
Batch processing
Collage
Best alternatives are XnView MPandIrfanView143 alternatives
PicView
41 likes
PicView is a fast, free and fully customizable image viewer for Windows 10 and 11.
Image Viewer
Free • Open Source
Windows
License model
Free • Open Source
Application types
Image Viewer
Image Editor
Platforms
Windows
+8
Properties
Lightweight
Privacy focused
Features
Fullscreen support
Image zoom
Portable
Dark Mode
Lossless Compression
Multiple languages
WEBP Support
No registration required
Ad-free
Works Offline
Hardware Accelerated
Batch Editing
Best alternatives are IrfanViewandXnView MP55 alternatives
Format Factory
223 likes
Efficiently convert media files with video, audio, and image options. Rips DVDs and CDs, supports diverse formats, and includes a screen recorder.
Video Converter
Free • Proprietary
Windows
License model
Free • Proprietary
Application types
Video Converter
Audio Converter
Country of Origin
China
Platforms
Windows
+4
Warning
Seven antivirus programs have detected it as malware: https://www.virustotal.com/gui/file/2caf3479fe1ec606695e9694bdd09bf3af1be6531743c812b09394d70cf03939
Format Factory Features
Combine PDF
Multiple export options
Multiple languages
Rendering
Blu-ray Support
Multitasking
Best alternatives are HandBrakeandFFmpeg275 alternatives
XnConvert
75 likes
XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux.
Image Optimizer
Free Personal • Proprietary
Mac
Windows
Linux
License model
Free Personal • Proprietary
Application types
Image Optimizer
Image Converter
Country of Origin
France
EU
Platforms
Mac
Windows
Linux
Properties
Lightweight
Features
Batch processing
Image Processing
Portable
Watermark images
Best alternatives are ImageMagick88 alternatives
Squoosh
33 likes
Compress and compare images with different codecs, right in your browser.
Image Optimizer
Free • Open Source
Online
License model
Free • Open Source
Application types
Image Optimizer
Image Converter
Country of Origin
United States
Platforms
Online
Squoosh Features
PNG Compression
Image Comparison
Progressive Web App
Offline
Image resizing
Ad-free
No registration required
Works Offline
Best alternatives are Caesium Image Compressor46 alternatives
gThumb
104 likes
gThumb is an image viewer and browser for the GNOME Desktop. It also includes an importer tool for transferring photos from cameras.
Image Editor
Free • Open Source
Linux
Flathub
GNOME
License model
Free • Open Source
Application types
Image Editor
Image Viewer
Country of Origin
United States
Platforms
Linux
Flathub
GNOME
+2
Properties
Privacy focused
Features
Ad-free
Works Offline
WEBP Support
In built video player
Search metadata
Photo selection
Slide Show
Image browser
Thumbnails
Best alternatives are IrfanViewandXnView MP118 alternatives
SageThumbs
60 likes
SageThumbs is a Windows Explorer context menu extension allowing Windows users to preview enormous amounts of image formats directly within Windows Explorer.
Image Converter
Free • Open Source
Windows
Windows Explorer
License model
Free • Open Source
Application types
Image Converter
Image Viewer
Country of Origin
Russia
Platforms
Windows
Windows Explorer
Discontinued
The latest version 2.0.0.23 was released on May 9th, 2017.
Properties
Lightweight
Features
Windows Explorer Extension
No registration required
Extensible by Plugins/Extensions
Ad-free
Works Offline
Thumbnail preview
Image Preview
Thumbnails
File preview
Best alternatives are IcarosandSmart SVG Viewer18 alternatives
Converseen
19 likes
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 Converter
Free • Open Source
Windows
Linux
License model
Free • Open Source
Application type
Image Converter
Country of Origin
Italy
EU
Platforms
Windows
Linux
Properties
Lightweight
Privacy focused
Features
Works Offline
No registration required
Support for Batch Mode
Batch conversion
Portable
No Tracking
Built-in viewer
Batch Editing
Dark Mode
Best alternatives are File Converter84 alternatives
CloudConvert
65 likes
CloudConvert is a online file conversion tool. more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.
Audio Converter
Freemium • Proprietary
Online
License model
Freemium • Proprietary
Application types
Audio Converter
Video Converter
Country of Origin
United Kingdom
Platforms
Online
CloudConvert Features
File conversion
Automatic conversion to multiple formats
Upload directly to Dropbox
Convert images to PDF
Upload directly to Google Drive
Export to PDF
Best alternatives are File Converter80 alternatives
VERT.sh
6 likes
VERT.sh is an online file converter that processes files on your device instead of the cloud. It's blazingly fast, ad-free, and open source.
Audio Converter
Free • Open Source
Online
Self-Hosted
Software as a Service (SaaS)
License model
Free • Open Source
Application types
Audio Converter
Video Converter
Platforms
Online
Self-Hosted
Software as a Service (SaaS)
+1
Properties
Lightweight
Privacy focused
Features
No registration required
Batch Editing
Dark Mode
No Tracking
Ad-free
Hardware Accelerated
Lossless Audio
File conversion
Best alternatives are File Converter48 alternatives

IrfanView

License model

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Country of Origin

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Features

XnView MP

License model

Application types

Country of Origin

Platforms

Top XnView MP Features

File Converter

License model

Application types

Platforms

Properties

Features

Image Toolbox (Resizer)

License model

Application types

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Properties

Features

ImageMagick

License model

Application types

Country of Origin

Platforms

Top ImageMagick Features

XnView Classic

License model

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Platforms

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Features

PicView

License model

Application types

Platforms

Properties

Features

Format Factory

License model

Application types

Country of Origin

Platforms

Format Factory Features

XnConvert

License model

Application types

Country of Origin

Platforms

Properties

Features

Squoosh

License model

Application types

Country of Origin

Platforms

Squoosh Features

gThumb

License model

Application types

Country of Origin

Platforms

Properties

Features

SageThumbs

License model

Application types

Country of Origin

Platforms

Properties

Features

Converseen

License model

Application type