Kling Raw File Saver

The general-purpose version of the pack's file-saving story. Give this node a URL or a local path, and it writes the file to your ComfyUI output folder - as bytes, untouched, no decoding into tensors along the way. It's the tool you use when you just want Kling's result on disk and you'd rather not have ComfyUI chew a video through its image pipeline to get it there. It's an output node, so it's the natural end of a branch.

Three inputs:

• url_or_path - a URL (http/https) or a local file path. If it's a URL, the node streams it down; if it's a local path, it copies the file. Empty string just returns an empty saved_path rather than erroring.
• filename_prefix - default kling_save. A random suffix gets appended to keep names unique.
• format - auto (detect from the URL/file extension), or force .mp4, .mp3, .png, .jpg. If auto can't figure out an extension, it guesses: .mp4 if "video" appears in the URL, otherwise .png.

The single output is saved_path - the absolute path where the file landed, which you can pipe into a next step or just read off. Because it streams (for URLs, it chunks the download), it handles large files without loading them into memory - the same OOM-avoidance philosophy as the Fast Video Saver, minus the video-specific framing.

Installing it

Bundled in ComfyUI-API-Toolkit. Manager: search "API Toolkit". Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/IxMxAMAR/ComfyUI-API-Toolkit
pip install -r requirements.txt

Restart ComfyUI. Requires only requests.

Gotchas

The download is a plain requests.get, so a flaky host or an expired Kling asset URL (tasks expire after roughly 72 hours) means a failed save - re-queue or re-fetch. And note the asymmetry with the rest of the pack: it saves files, not ComfyUI assets. If you've already got the result as an IMAGE or AUDIO tensor, you don't need this node - the standard Save nodes and the video nodes' own video_file output handle that. Where it shines is the in-between case: you've got a URL string from another node and you want the raw file, exactly as the API delivered it, without ComfyUI deciding what an mp4 is.