DP Create JSON File

This one's a workflow-plumbing node, not a generation node. You type a little table into it - rows and columns separated by pipes - and it writes out a proper JSON file to disk, plus hands you the JSON as a string. If you're building batch runs, prompt libraries, or a config that some other node reads back later, this is the "author it once, save it" step.

The default json_data tells you exactly what it's for:

index | name | prompt
00 | comics | sketchy comics art, minimal illustration
01 | anime | colorful anime style, vibrant colors
02 | realistic | photorealistic rendering, high detail

First line is the header (the keys), every line after is a record. Out comes a JSON array of objects keyed by those column names. It's a spreadsheet-in-a-textbox that becomes structured data.

The inputs that matter

• json_data (multiline) - your table. First row = column names, one record per line, cells split by the separator.
• line_separator (default |) - the delimiter between cells. The pipe is a good default because it almost never shows up inside a prompt; if your text contains pipes, change this to something you're not using.
• file_name (default my_json_file) and save_path (default output\json) - where it lands. That default path is written Windows-style with a backslash; on Linux/Mac it'll still resolve relative to your ComfyUI output folder, but if you care where the file goes, set the path explicitly.
• save_file (default true) - actually write to disk. Turn it off and you still get the json_text output without leaving a file behind.
• overwrite (default false) - off means it won't clobber an existing file of the same name. Leave it off until you specifically want to replace.

Outputs are json_text (the JSON as a string, for chaining into whatever reads it) and log_info (a status line telling you what it wrote and where).

How to install it

ComfyUI Manager: search ComfyUI-Desert-Pixel-Nodes, install, restart. Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/DesertPixelAi/ComfyUI-Desert-Pixel-Nodes

then restart. Pure Python utility - no models, no special dependencies. Find it under the "DP" utils category.

Common issues & troubleshooting

The file didn't appear. Two checks: save_file has to be on, and overwrite has to be true if a file with that name already exists (otherwise it skips the write to protect what's there). The log_info output will tell you which case you hit - wire it to a text preview and read it.

Rows came out with wrong columns. Your data has a stray separator inside a cell. If a prompt contains a |, the node splits on it and your columns shift. Change line_separator to a character your text never uses.

I can't find where it saved. The default save_path is relative and written with a backslash. Set an explicit path you recognize, run once, and read log_info for the resolved location before assuming it failed.

Do I even need this? If you're doing one prompt at a time, no. It earns its place when you're driving a batch from a table - author your variants as rows here, save once, and feed the JSON to whatever loops over it. For a single throwaway list, a plain text node is less ceremony.