Pixel Art Fixer converts images into grid-aligned pixel art using image processing without requiring a model.
Open source
24 alternativeschaiNNer
Use chaiNNer to build and run image-processing pipelines in a node editor on Windows, macOS, or Linux.
About chaiNNer
chaiNNer is a node-based editor for image-processing pipelines on Windows, macOS, and Linux. Users drag nodes onto a canvas, connect them, and run the chain, with each node performing one task such as loading an image, upscaling, resizing, removing the background, or saving.
It was originally built for AI upscaling with community-trained super-resolution models run through PyTorch, NCNN, ONNX, or TensorRT. It also handles color correction, blending, format conversion, pixel-art scaling, normal maps, batch runs over folders, and video frames, with conditional branches and computed filenames.
Key features
- Run super-resolution models through PyTorch, NCNN, ONNX, or TensorRT
- Restore faces on upscale with color drift correction
- Generate and combine normal maps with DDS export
- Upscale pixel art with HQ2x, Eagle, and AdvMAME
- Loop chains over image folders, video clips, and models
- Branch chains with conditions and build output filenames
Best for: People who want to build upscaling and batch image workflows without writing scripts.
Good for
- Open source for Windows, macOS, and Linux
- Works with multiple model architectures and inference frameworks
- Shows errors on the causing node with pause and stop controls
chaiNNer at a glance
- Website
- chainner.app
- Category
- Design & Creative › Image Creation & Editing
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, macOS, Web, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
chaiNNer alternatives
Tools and sites you could use instead, ranked by how closely they match.
Final2x provides image super-resolution on Windows, macOS, and Linux, with options to use built-in or custom models.
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Upscayl offers free, open-source AI image upscaling software for Linux, macOS, and Windows.
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24 alternativesCreate pixel art and other 2D graphics with PixiEditor, a free and open-source editor.
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LazPaint offers a cross-platform image editor with raster and vector layers, built with Lazarus and Free Pascal.
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Pixelorama provides an open-source sprite editor and pixel art tool for creating and editing sprites.
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chaiNNer FAQ
How do I build a chain in chaiNNer?
Pick a node from the list or right-click the canvas, connect the typed handles, then press run. Connections light up as data moves through the chain.
Can chaiNNer process multiple images or video?
Yes. Load Images points at a folder and Load Video at a clip, which turns everything downstream into a loop. Save Image collects results and Save Video re-encodes frames.
What models does upscaling support?
Community models, mostly from OpenModelDB, handled through Spandrel, covering ESRGAN, SPAN, OmniSR, and dozens of other architectures.
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