Save Image With Info

ComfyUI's built-in Save Image is fine until it isn't. It writes PNG, embeds the workflow JSON so you can drag the file back onto the canvas, and quietly destroys everything else - your DPI, your EXIF, and any chance of saving as anything but PNG. If you've ever needed a JPG for a photo upload site or wanted a real camera's EXIF data to survive a round-trip, you've hit that wall. Save Image With Info is the output node that refuses to lose all of that.

It's the save half of a two-node pack (sjh00/ComfyUI-LoadImageWithInfo), designed to pair with its sibling Load Image With Info, which reads filename, format, DPI, dimensions, file size, and EXIF off a loaded image. Wire them together - load an image, send its metadata to the save node - and you can re-save an edited photo in a new format without the metadata silently disappearing. On its own it still earns its place: it's a terminal output node (same category as the built-in SaveImage, nothing comes out of it) that saves wherever ComfyUI writes its outputs, with far more control over the file it produces.

Mechanically it's a thin, honest wrapper. Your IMAGE tensor gets converted to a PIL image, the dpi value you pass gets written into the file's DPI info, and then it hands the whole thing to PIL's img.save() with format-specific settings. The PNG path embeds your prompt and workflow via PngInfo, so you keep the "workflow included" sharing culture intact. That's the part worth calling out: metadata preservation here isn't magic, it's just Pillow being told not to drop fields it normally would.

The inputs that actually matter:

• format - original, avif, webp, jpg, png, or tiff. With original, it saves as whatever original_format says (default png) - that's the slot you feed Load Image With Info's format output into.
• quality - 1–100. The tooltip tells you the real story: AVIF 60 ≈ WebP 90, so quality is per-format. PNG ignores it entirely (compression is fixed at level 4, deliberately). Set 100 and WebP/AVIF go lossless.
• exif - a JSON string of EXIF tags. JPG is the only format that actually writes them.
• dpi, always_save_png, image_preview - DPI value, whether to also drop a PNG copy into a LoadImageWithInfoPNG folder in your output dir, and the preview toggle.

Install is the usual: ComfyUI Manager, search "ComfyUI LoadImageWithInfo", restart. Or cd ComfyUI/custom_nodes && git clone https://github.com/sjh00/ComfyUI-LoadImageWithInfo, restart. One real dependency: pillow-avif-plugin - it's the entire requirements.txt, and the node imports it at module load. Manager handles it; if you clone manually and AVIF support is missing, pip install pillow-avif-plugin and restart, or the node refuses to load at all.

Where people get burned: EXIF only survives on JPG - save as WebP or AVIF and it's ignored, per the README. ComfyUI-generated images usually have no EXIF and a default 96 DPI, so don't expect magic from AI output; this node shines on real photos. If a format can't be written, it silently falls back to PNG. And duplicate filenames get auto-incremented (image_1.png), so no overwriting, but also no quiet surprises if you weren't expecting the suffix. The name is a slight lie - it calls no API and needs no key - it just saves files the way you asked, metadata included.