This repository includes waifu2x and tools for converting 2D video into stereo 3D video.
The Best Quarkdown Alternatives in 2026
Looking for something like Quarkdown? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 24 are open source.
Quarkdown converts Markdown into papers, presentations, websites, books, and knowledge bases.
Top picks at a glance
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Waifu2x | — | Yes | Windows, macOS, Linux |
| 2 | Frame Svg | — | Yes | — |
| 3 | Pixel Art Fixer | — | Yes | — |
| 4 | Spritefusion Pixel Snapper | — | Yes | — |
| 5 | Mini Photo Editor | — | Yes | macOS |
| 6 | Tiler | — | Yes | — |
| 7 | Rembg | — | Yes | — |
| 8 | Tinter | — | Yes | — |
| 9 | Rx | — | Yes | — |
| 10 | AI Generation | — | Yes | — |
All Quarkdown alternatives
Convert animated GIFs into animated SVGs with FrameSVG through its web app, command-line tool, or Python library.
Pixel Art Fixer converts images into grid-aligned pixel art using image processing without requiring a model.
Sprite Fusion Pixel Snapper moves pixel art onto a consistent grid to fix messy or uneven pixels.
mini-img-editor is a WebGL photo editor with effects, filters, and cropping tools.
Tiler assembles a composite image from a collection of smaller images used as tiles.
Rembg is a tool to remove images background.
Tinter generates color variations for images in a small browser-based editing tool.
Rx offers a minimalist pixel editor, with its source code available on GitHub.
This Krita plugin adds image generation, inpainting, and outpainting to painting and editing workflows, with optional text prompts.
The GIMP Resynthesizer suite adds texture synthesis plugins to the GIMP image editor.
Real-ESRGAN develops algorithms for general image and video restoration.
Final2x provides image super-resolution on Windows, macOS, and Linux, with options to use built-in or custom models.
Upscayl offers free, open-source AI image upscaling software for Linux, macOS, and Windows.
QualityScaler upscales images and videos with AI, with project documentation covering features and usage.
Pinta provides a GTK paint program, with its project source code and releases hosted on GitHub.
This curated pixel art resource list links to tutorials, inspiration, animation guidance, and community resources for creating pixel art.
Perfect Freehand provides drawing tools for creating pressure-sensitive freehand lines.
LazPaint offers a cross-platform image editor with raster and vector layers, built with Lazarus and Free Pascal.
PhotoGIMP adjusts the GIMP 3 layout for people familiar with Photoshop.
This non-destructive 2D graphics editor project has ended, according to its maintainer, who says development is no longer active.
Use Provector to create vector illustrations with its lightweight drawing interface.
Gifsicle creates, edits, and optimizes GIF images and animations, including changing frames, timing, transparency, and playback options.
Csprite provides a pixel-art editor for Linux and Windows, with repository details covering sprite editing and drawing.
Alternatives to similar tools
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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
























