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.

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IrfanView
Free Personal • Proprietary
Image Viewer
Image Editor
Image Converter
Windows
PortableApps.com
129 IrfanView alternatives
Fast and compact image viewer/converter trying to be simple for beginners and powerful for professionals. Many supported file formats and features. Features included: multi-language support, Thumbnail option, Painting, slideshow, toolbar skins, fast directory browsing, batch...
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IrfanView Features
1. LightweightIrfanView consumes less device resources compared to similar apps.
2. PortableIrfanView can be used from a USB stick or similar with no prior installation.
3. Extensible by Plugins/ExtensionsIrfanView can be extended with add-ons, plugins and extensions.
4. Command line interfaceIrfanView either have CLI support or is a CLI-only app.
5. Batch Rename FilesIrfanView supports renaming of different types of files or data in large batches.
6. Ad-freeIrfanView doesn't contain any form of external advertising.
Batch conversion
Image Navigation
Intuitive Interface
Convert images to PDF
Image Combining
Customizable
Folders
Lossless Compression
Page labeling
Photo effects
Top 3 alternatives
File Converter
Free • Open Source
Video Converter
Audio Converter
Image Converter
Windows
Windows Explorer
253 File Converter alternatives
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.
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File Converter Features
1. Windows Explorer ExtensionFile Converter can extend Windows Explorer in various ways, for example add context menu options, etc..
2. PortableFile Converter can be used from a USB stick or similar with no prior installation.
3. Works OfflineFile Converter can be used without the need to connect to the internet.
Built-in Media converter
Presets
Shell integration
Built-in Image converter
File conversion
Discontinued
The last version (1.2.3) was released in 2017.
Top 3 alternatives
XnView
Free Personal • Proprietary
Image Viewer
Image Converter
Windows
PortableApps.com
ReactOS
130 XnView alternatives
XnView is a utility for viewing and converting graphic files. XnView is provided as FREEWARE for private non-commercial or educational use (including non-profit organization).
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XnView Features
1. Batch Rename FilesXnView supports renaming of different types of files or data in large batches.
2. Built-in viewerXnView shows you a quick preview of an image, page or file in supported formats.
3. PortableXnView can be used from a USB stick or similar with no prior installation.
Batch conversion
Image resizing
Batch processing
Image Correction
Crop images
Convert PDF to image
Multiple languages
Image Combining
Collage
Top 3 alternatives
ImageMagick
Free • Open Source
Image Optimizer
Image Editor
Image Converter
Mac
Windows
Linux
Android
iPhone
iPad
Xfce
68 ImageMagick alternatives
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.
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ImageMagick Features
1. Command line interfaceImageMagick either have CLI support or is a CLI-only app.
Batch processing
Image Processing
Batch image manipulation
Watermarking
RAM Scraping Protection
Geotagged Photos
Top 3 alternatives
Format Factory
Free • Proprietary
Video Converter
Audio Converter
DVD Ripper
Windows
269 Format Factory alternatives
Format Factory is a multifunctional media converter and DVD ripper. Its features include:
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Format Factory Features
1. Combine PDFCombine, merge and arrange PDF files into one document.
Multiple export options
Blu-ray Support
Multitasking
Rendering
Multiple languages
Bundleware
Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/
Top 3 alternatives
XnConvert
Free Personal • Proprietary
Image Optimizer
Image Converter
Mac
Windows
Linux
79 XnConvert alternatives
XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux.
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XnConvert Features
1. PortableXnConvert can be used from a USB stick or similar with no prior installation.
2. LightweightXnConvert consumes less device resources compared to similar apps.
Batch processing
Image Processing
Watermark images
Top 3 alternatives
SageThumbs
Free • Open Source
Image Viewer
Image Converter
Windows
Windows Explorer
14 SageThumbs alternatives
SageThumbs is a Windows Explorer context menu extension allowing Windows users to preview enormous amounts of image formats directly within Windows Explorer.
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SageThumbs Features
1. Windows Explorer ExtensionSageThumbs can extend Windows Explorer in various ways, for example add context menu options, etc..
2. LightweightSageThumbs consumes less device resources compared to similar apps.
3. No registration requiredYou can use most of the features in SageThumbs without registration.
4. Extensible by Plugins/ExtensionsSageThumbs can be extended with add-ons, plugins and extensions.
5. Ad-freeSageThumbs doesn't contain any form of external advertising.
6. Works OfflineSageThumbs can be used without the need to connect to the internet.
Thumbnail preview
Image Preview
Thumbnails
File preview
Discontinued
The latest version 2.0.0.23 was released on May 9th, 2017.
Top 3 alternatives
gThumb
Free • Open Source
Image Viewer
Image Editor
Photo Manager
Linux
GNOME
110 gThumb alternatives
gThumb is an image viewer and browser for the GNOME Desktop. It also includes an importer tool for transferring photos from cameras.
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gThumb Features
1. Works OfflinegThumb can be used without the need to connect to the internet.
2. Ad-freegThumb doesn't contain any form of external advertising.
3. Privacy focusedgThumb is considered a privacy friendly alternative.
WEBP Support
Edit metadata
Metadata Search
Image browser
Photo selection
In built video player
Slide Show
Thumbnails
Top 3 alternatives
PicView
Free • Open Source
Image Viewer
Image Editor
Image Converter
Windows
44 PicView alternatives
PicView is a fast and efficient image viewer for Windows 10 or 11 that comes equipped with a clean and concise user customizable interface that can be conveniently hidden when not needed.
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PicView Features
1. Color PickerPicView allows you to select and copy a color property from an image, object, or shape.
2. PortablePicView can be used from a USB stick or similar with no prior installation.
3. LightweightPicView consumes less device resources compared to similar apps.
4. Dark ModePicView supports dark mode for comfortable usage in low light conditions.
5. No registration requiredYou can use most of the features in PicView without registration.
6. Privacy focusedPicView is considered a privacy friendly alternative.
7. Ad-freePicView doesn't contain any form of external advertising.
8. Works OfflinePicView can be used without the need to connect to the internet.
9. No TrackingPicView will not track you or use your personal data.
Fullscreen support
Image zoom
Lossless Compression
Customizable
Multiple languages
WEBP Support
Borderless
Batch processing
Top 3 alternatives
Squoosh
Free • Open Source
Image Optimizer
Online
30 Squoosh alternatives
Compress and compare images with different codecs, right in your browser.
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Squoosh Features
PNG Compression
Image Comparison
Progressive Web App
Image resizing
Offline
Top 3 alternatives
FastStone Photo Resizer
Free Personal • Proprietary
Image Optimizer
Image Editor
Windows
91 FastStone Photo Resizer alternatives
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 and border effects

Rename images with sequential number

Search and replace texts in the file names

Preview conve.
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FastStone Photo Resizer Features
Image resizing
Batch processing
Watermarking
Top 3 alternatives
CloudConvert
Freemium • Proprietary
Audio Converter
Video Converter
Image Converter
Online
62 CloudConvert alternatives
CloudConvert is a online file conversion tool. more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.
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CloudConvert Features
File conversion
Convert images to PDF
Upload directly to Google Drive
Automatic conversion to multiple formats
Upload directly to Dropbox
Top 3 alternatives
Adobe Media Encoder
Paid • Proprietary
Video Converter
Audio Converter
Image Converter
Mac
Windows
166 Adobe Media Encoder alternatives
Adobe Media Encoder is a standalone application handy for encoding audio and video in multiple formats. Furthermore, it can serve as a companion for other related applications such as Adobe After Effects, Premiere Pro, Audition, Character Animator, and Prelude.
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Adobe Media Encoder Features
FFMPEG support
Crop video
Batch conversion
Split Video
Top 3 alternatives
Remini
Paid • Proprietary
Image Upscaling App
Online
Android
iPhone
41 Remini alternatives
Remini makes old, blurred or low quality photos taken with old cameras or mobile phones to high-definition and clarity.
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Remini Features
1. Ad-freeRemini doesn't contain any form of external advertising.
2. No registration requiredYou can use most of the features in Remini without registration.
3. Works OfflineRemini can be used without the need to connect to the internet.
4. Ebook ConversionConvert your ebooks to various formats (PDF, EPUB, MOBI…) and vice-versa with Remini.
5. OCRExtract the text from a screen capture or file and paste it into another document for edits.
6. LightweightRemini consumes less device resources compared to similar apps.
7. Batch Rename FilesRemini supports renaming of different types of files or data in large batches.
8. Dark ModeRemini supports dark mode for comfortable usage in low light conditions.
9. Windows Explorer ExtensionRemini can extend Windows Explorer in various ways, for example add context menu options, etc..
Image Processing
AI-Powered
Retouch photos
Image Restoration Tools
Top 3 alternatives
XnShell
Free • Proprietary
Image Converter
Windows
Windows Explorer
25 XnShell alternatives
XnShell is a free File Explorer extension that installs a number of image-related tools in the right-click context menu, including a thumbnail preview, image conversion to a wide variety of formats, image resizing, editing image IPTC...
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XnShell Features
1. Windows Explorer ExtensionXnShell can extend Windows Explorer in various ways, for example add context menu options, etc..
Context Menu extension
Top 3 alternatives

IrfanView Features

Top 3 alternatives

File Converter Features

Top 3 alternatives

XnView Features

Top 3 alternatives

ImageMagick Features

Top 3 alternatives

Format Factory Features

Top 3 alternatives

XnConvert Features

Top 3 alternatives

SageThumbs Features

Top 3 alternatives

gThumb Features

Top 3 alternatives

PicView Features

Top 3 alternatives

Squoosh Features

Top 3 alternatives

FastStone Photo Resizer Features

Top 3 alternatives

CloudConvert Features

Top 3 alternatives

Adobe Media Encoder Features

Top 3 alternatives

Remini Features

Top 3 alternatives

XnShell Features

Top 3 alternatives