1
Also covers docker and open source · same kind of open-source project
Palettum recolors images, GIFs, and videos with a custom palette using either a web app or command-line tool.
Alternatives
The Best Extensions Alternatives in 2026
24 alternatives0 free · 23 open source
Looking for something like Extensions? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 23 are open source.
About Extensionsgithub.com/kevmo314/magic-copy
VisitMagic Copy is a Chrome extension that extracts a foreground object from an image and copies it to the clipboard using Meta’s segmentation model.
Top picks at a glance
First suggestionPalettumPalettum recolors images, GIFs, and videos with a custom…Another optionCollaigoCollaigo creates photo collages in a browser with…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Palettum | — | Yes | macOS |
| 2 | Collaigo | — | Not stated | Browser extension, Web |
| 3 | Final2x | — | Yes | Linux, macOS, Windows |
| 4 | Pixel Art Fixer | — | Yes | — |
| 5 | Tiler | — | Yes | — |
| 6 | AI Generation | — | Yes | — |
| 7 | Texture Synthesizer | — | Yes | Windows |
| 8 | Real-ESRGAN | — | Yes | — |
| 9 | Upscayl | — | Yes | Linux, macOS, Windows |
| 10 | Lazpaint | — | Yes | Linux, macOS, Windows |
All Extensions alternatives
2
Collaigo
collaigo.comAlso covers browser extension
Collaigo creates photo collages in a browser with templates, frames, and grids, and exports images up to 4K.
3
Also covers open source · same kind of open-source project
Final2x provides image super-resolution on Windows, macOS, and Linux, with options to use built-in or custom models.
4
Also covers open source · same kind of open-source project
Pixel Art Fixer converts images into grid-aligned pixel art using image processing without requiring a model.
5
Also covers open source · same kind of open-source project
Tiler assembles a composite image from a collection of smaller images used as tiles.
6
Also covers open source · same kind of open-source project
This Krita plugin adds image generation, inpainting, and outpainting to painting and editing workflows, with optional text prompts.
7
Also covers open source · same kind of open-source project
The GIMP Resynthesizer suite adds texture synthesis plugins to the GIMP image editor.
8
Also covers open source · same kind of open-source project
Real-ESRGAN develops algorithms for general image and video restoration.
9
Also covers open source · same kind of open-source project
Upscayl offers free, open-source AI image upscaling software for Linux, macOS, and Windows.
10
Also covers open source · same kind of open-source project
LazPaint offers a cross-platform image editor with raster and vector layers, built with Lazarus and Free Pascal.
11
Also covers open source · same kind of open-source project
RapidRAW is a GPU-accelerated RAW image editor that supports non-destructive editing.
12
Also covers open source · same kind of open-source project
This repository includes waifu2x and tools for converting 2D video into stereo 3D video.
13
Also covers open source · same kind of open-source project
Rembg removes backgrounds from images through a command-line tool and software library.
14
Also covers open source · same kind of open-source project
Tinter generates color variations for images in a small browser-based editing tool.
15
Also covers open source · same kind of open-source project
Rx offers a minimalist pixel editor, with its source code available on GitHub.
16
Also covers open source · same kind of open-source project
Linux designers can use Akira, a native Vala and GTK application for UI and UX design.
17
Also covers open source · same kind of open-source project
Sprite Fusion Pixel Snapper moves pixel art onto a consistent grid to fix messy or uneven pixels.
18
Also covers open source · same kind of open-source project
QualityScaler upscales images and videos with AI, with project documentation covering features and usage.
19
Also covers open source · same kind of open-source project
Pinta provides a GTK paint program, with its project source code and releases hosted on GitHub.
20
Also covers open source · same kind of open-source project
This curated pixel art resource list links to tutorials, inspiration, animation guidance, and community resources for creating pixel art.
21
Also covers open source · same kind of open-source project
Perfect Freehand provides drawing tools for creating pressure-sensitive freehand lines.
22
Also covers open source · same kind of open-source project
Convert animated GIFs into animated SVGs with FrameSVG through its web app, command-line tool, or Python library.
23
Also covers open source · same kind of open-source project
PhotoGIMP adjusts the GIMP 3 layout for people familiar with Photoshop.
24
Also covers open source · same kind of open-source project
mini-img-editor is a WebGL photo editor with effects, filters, and cropping tools.
No alternatives match this filter.
Alternatives to similar tools
Real-ESRGAN24 alternativesSpritefusion Pixel Snapper24 alternativesPerfect Freehand24 alternativesMini Photo Editor24 alternativesAI Generation24 alternativesUpscayl24 alternatives
What is the best alternative to Extensions?
Based on features, tags and platforms, the closest alternatives to Extensions are Palettum, Collaigo, and Final2x.
Are there open-source alternatives to Extensions?
Yes: Palettum, Final2x, Pixel Art Fixer, and Tiler.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative