Software · Photo & graphics

Thumbnails

Thumbnails is an image viewer, available on Linux: format conversion.

Completely free
Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-2.0+ — Open source (copyleft)confirmed by Flathub, Wikidata
Open source: Yes
Commercial use: Yesconfirmed by Flathub, Official plan pages (pricing, licence, terms)
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: not documented
Ads: not documented
Platforms: LinuxEstablished by Linux: Flathub
Publisher: Paolo Bacchilega
Latest version: 4.0.1 (1 November 2026)
Latest activity: 10 November 2026
Source code: gitlab.gnome.org/GNOME/gthumb

Overview

Thumbnails is an image viewer, available on Linux.

Features described in its Flathub listing: format conversion.

File formats mentioned: SVG, PNG, JPEG, WEBP, AVIF, GIF and TIFF.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Image viewer and browser utility for the GNOME environment.” — Wikidata, 11 November 2026
“Format conversion” — Flathub, 11 November 2026

At a glance

All of Thumbnails is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

Image viewer, editor, browser and organizer. View images: PNG, JPEG, WEBP, SVG, JXL, HEIF, AVIF, TIFF, GIF, RAW. Edit images: scale, rotate and crop images, change contrast, brightness and saturation, as well as other color transformations. View and edit embedded metadata: EXIF, IPTC and XMP. File manager operations: copy, move, rename and delete files and folders, execute scripts on the selected files. Image specific tools: JPEG lossless transformations Image resize Format conversion Slideshow Setting an image as desktop background Add comments and other metadata to images, organize images in catalogs and catalogs in libraries, search for images and save the result as a catalog.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 7 November 2026
Facts collected from Wikidata (licence, platforms) — 5 November 2026
Last technical check: 5 November 2026
Description from Flathub — AppStream (Flathub)

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