gThumb

{{Short description|Image viewer and browser utility for the GNOME environment}}

{{Infobox software

| logo = GThumb Logo.svg

| screenshot = GThumb 3.8.0 screenshot.png

| caption = gThumb v3.8.0 in EDIT mode

| author = Paolo Bacchilega

| developer = The GNOME Project

| released = {{Start date and age|2001}}

| latest release version = {{wikidata|property|reference|edit|P348|P548=Q2804309}}

| latest release date = {{start date and age | {{wikidata|qualifier|P348|P548=Q2804309|P577}} }}

| latest preview version = {{wikidata|property|preferred|reference|edit|P348|P548=Q51930650}}

| latest preview date = {{start date and age | {{wikidata|qualifier|P348|P548=Q51930650|P577}} }}

| programming language = C (GTK)

| operating system = Unix-like

| language =

| genre = {{Unbulleted list|Image viewer|Image organizer|Post-production tool}}

| license = GPL-2.0-or-later

| website = {{URL|https://wiki.gnome.org/Apps/Gthumb}}

}}

gThumb is a free and open-source image viewer and image organizer with options to edit images."[http://lifehacker.com/5562821/gthumb-brings-better-photo-browsing-and-importing-to-linux gThumb Brings Better Photo Browsing and Importing to Linux]". Lifehacker, 14 June 2010. Accessed 21 March 2017 It is designed to have a clean and simple user interface and follows the GNOME Human Interface Guidelines and integrates well with the GNOME desktop environment.

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 cameras.

gThumb offers a certain range of image editing operations suited for digital photography, 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 removal function. Manipulated images can be saved in the formats JPEG, PNG, TIFF, .tga, avif, heif and WebP.{{cite web

|title=[gthumb-list] gThumb 3.1.1 released

|url=https://mail.gnome.org/archives/gthumb-list/2012-September/msg00000.html

|access-date=2 May 2020}}

gThumb can export web-based photograph albums with various theme templates. These albums can be uploaded to a website, 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, and batch renaming.

Can read and write EXIF, XMP, IPTC metadata.{{Cite web |title=About gThumb |url=https://help.gnome.org/users/gthumb/stable/gthumb-introduction.html.en |access-date=2025-05-21 |website=help.gnome.org}}

Provides a system of extensions (or plug-ins), to allow users to extend the functionality of gThumb,{{Cite web |title=Extending gThumb |url=https://help.gnome.org/users/gthumb/stable/gthumb-extensions.html.en |access-date=2025-05-21 |website=help.gnome.org |quote=Some standard features are implemented as extensions and are supplied with the standard distribution. Users may write (and share) additional extensions}} ability to call external scripts created in any language.{{Cite web |title=Vitaly Zdanevich / upload_to_commons_with_categories_from_iptc · GitLab |url=https://gitlab.com/vitaly-zdanevich/upload-to-commons-with-categories-from-iptc |access-date=2025-05-21 |website=GitLab |language=en}}

= 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'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.{{Cite web|url=http://gthumb.sourceforge.net/news.html|title=GTHUMB}}