gThumb is a

free and open-source Free and open-source software (FOSS) is software available under a Software license, license that grants users the right to use, modify, and distribute the software modified or not to everyone free of charge. FOSS is an inclusive umbrella term ...

image viewer and image organizer with options to edit images. It is designed to have a clean and simple

user interface In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine fro ...

and follows the GNOME Human Interface Guidelines and integrates well with the

GNOME A gnome () is a mythological creature and diminutive spirit in Renaissance magic and alchemy, introduced by Paracelsus in the 16th century and widely adopted by authors, including those of modern fantasy literature. They are typically depict ...

desktop environment In computing, a desktop environment (DE) is an implementation of the desktop metaphor made of a bundle of programs running on top of a computer operating system that share a common graphical user interface (GUI), sometimes described as a graphi ...

Features

gThumb allows the filesystem to be browsed for images. They can be organized into catalogs, or viewed as a slideshow. Folders and catalogs can be bookmarked, and comments can be added to images. Via gPhoto it can also acquire data directly from

digital camera A digital camera, also called a digicam, is a camera that captures photographs in Digital data storage, digital memory. Most cameras produced today are digital, largely replacing those that capture images on photographic film or film stock. Dig ...

s. gThumb offers a certain range of

image editing Image editing encompasses the processes of altering images, whether they are Digital photography, digital photographs, traditional Photographic processing, photo-chemical photographs, or illustrations. Traditional analog image editing is known ...

operations suited for

digital photography Digital photography uses cameras containing arrays of electronic photodetectors interfaced to an analog-to-digital converter (ADC) to produce images focused by a lens, as opposed to an exposure on photographic film. The digitized image is ...

, such as the change of image hue, saturation, lightness, contrast or the adjustment of colors and sharpness. It can also crop, scale and rotate images by 90° or custom angles, and it features a

red-eye effect The red-eye effect in photography is the common appearance of red pupils in color photographs of eyes. It occurs when using a photographic flash at low lighting or at night. When a flash passes through the eyes and rebounds at the back of the ...

removal function. Manipulated images can be saved in the formats JPEG, PNG,

TIFF Tag Image File Format or Tagged Image File Format, commonly known by the abbreviations TIFF or TIF, is an image file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers. TIFF is w ...

, .tga, avif, heif and

WebP WebP is a raster graphics file format developed by Google intended as a replacement for JPEG, PNG, and GIF file formats. It supports both lossy and lossless compression, as well as animation and alpha transparency. Google announced the WebP ...

. gThumb can export web-based photograph albums with various theme templates. These albums can be uploaded to a

website A website (also written as a web site) is any web page whose content is identified by a common domain name and is published on at least one web server. Websites are typically dedicated to a particular topic or purpose, such as news, educatio ...

, providing a very simple mechanism for publishing collections of photos on the web. gThumb also includes many basic features such as copying, moving, deleting or duplicating images, printing, zooming, format

transcoding Transcoding is the direct digital-to-digital conversion of one encoding to another, such as for video data files, audio files (e.g., MP3, WAV), or character encoding (e.g., UTF-8, ISO/IEC 8859). This is usually done in cases where a target ...

, and batch renaming. Can read and write

EXIF Exchangeable image file format (officially Exif, according to JEIDA/JEITA/CIPA specifications) is a standard that specifies formats for images, sound, and ancillary tags used by digital cameras (including smartphones), scanners and other system ...

, XMP, IPTC metadata. Provides a system of extensions (or plug-ins), to allow users to extend the functionality of gThumb, ability to call external scripts created in any language.

Dependencies

gThumb only requires glib (>= 2.36.0), gtk (>= 3.16), gthread, gmodule and gio-unix. Libraries that are not mandatory but possible include exiv2, libjpeg, LibTIFF, LibRaw, and

JPEG XL The JPEG XL Image Coding System is a royalty-free open standard for a image compression, compressed Raster graphics, raster image format. It defines a graphics file format and the abstract device for coding JPEG XL bitstreams. It is developed by t ...

's libjxl.

History

The first public version was 0.2 in 2001. It was originally based on GQView. Starting from version 2.12.0 gThumb allows users to export images to various websites. Version 3.0.0 is based on GTK version 3, and supports high quality SVG zoom.

Gallery

File:GThumb-3.4.0.png , gThumb v3.4.0 File:GThumb v3.4--Edit mode.png , gThumb v3.4--Edit mode File:GThumb v3.4--Special effects.png , gThumb v3.4--Special effects File:GThumb v3.4--Adjust Colors.png , gThumb v3.4--Adjust Colors File:GThumb v3.4--Adjust sharpness.png , gThumb v3.4--Adjust sharpness

References

External links

* {{DEFAULTSORT:Gthumb Free image organizers Free image viewers Free photo software Free software programmed in C GNOME Applications Graphics software that uses GTK Linux image viewers Photo software for Linux