💾 Save Image

ComfyUI's built-in Save Image is fine until you need to output a JPG for a client, a WebP for a website, or a PNG that isn't 40MB because you forgot it embeds the full workflow. ArchAi3D Save Image is that node with a format dropdown and the compression knobs ComfyUI's default keeps hidden. Nothing about it is exotic - it's just the save node you actually want when file size and format matter.

The three inputs you'll touch every time: images (your IMAGE tensor), filename_prefix (what goes at the front of the filename, default "ComfyUI"), and format - PNG, JPG, or WebP. PNG is the default because it embeds workflow metadata, which is the whole ComfyUI culture of "workflow included": anyone who drags your PNG back into ComfyUI gets the graph back.

What's actually worth setting

• quality (1-100, default 95) - governs JPG and WebP compression. For WebP, 100 means lossless.
• embed_workflow - embed the workflow in the PNG. Default on; turn it off for leaner files or if you're sharing raw outputs.
• save_workflow_json - dump the workflow as a separate .json file instead of (or alongside) embedding it. Handy for versioning.
• png_compress_level (0-9, default 4) - the classic tradeoff: 0 is huge and instant, 9 is small and slow. You'll rarely need to move off 4.
• jpg_subsampling - 4:2:0 is small and fine for photos; 4:4:4 is bigger but crisper for text and fine edges.
• use_opencv - switches WebP encoding to OpenCV, which the tooltip claims is 5-10x faster on 4K+ images. Only matters if you're batch-saving huge frames.

The deeper set - webp_method, webp_lossless, webp_exact, jpg_optimize - are there for people shipping to specific pipelines. Leave them alone until you have a reason.

Outputs and wiring

It has no outputs - it's an output node, the end of the line. output_name is worth knowing though: it's a label the pack's web-interface integration uses to identify this output, so a custom frontend can point at it by name. If you're just using default ComfyUI, ignore it.

Installation

Part of the ComfyUI-ArchAi3d-Qwen pack. Through ComfyUI Manager, search "ArchAi3d Qwen"; manually:

cd ComfyUI/custom_nodes/
git clone https://github.com/amir84ferdos/ComfyUI-ArchAi3d-Qwen.git
cd ComfyUI-ArchAi3d-Qwen
pip install -r requirements.txt

Restart ComfyUI, and it shows up under ArchAi3d/Image. The requirements pull the whole pack's dependencies, so the install is heavier than this node strictly needs. Free for personal use; commercial use needs the author's paid license.

Where people get burned

If you switch to JPG or WebP, the tooltip caveat applies: only PNG carries embedded workflow metadata, so a JPG means the "workflow included" trick is gone. Also, quality and png_compress_level don't interact - quality only touches JPG/WebP, png_compress_level only PNG. And if you ever set save to false thinking it'll just preview, that's the trap: the node silently does nothing. Output appears where every ComfyUI output does - ComfyUI/output/.