Float to String

You want a float in a filename or a label, and you do not want it to come out as 0.75000001192. JWFloatToString converts a FLOAT to a STRING, and its format string is what keeps the output clean - a controlled number of digits instead of the full floating-point mess.

This matters more than it sounds because floats are imprecise by nature. A value that reads 0.75 in a widget can be 0.7500000119 under the hood, and if you drop that straight into a filename you get an ugly, unsortable name. The format string trims it to something sane. Use this whenever a decimal needs to become text: a save path, an output label, a piece you're concatenating into a larger string.

How it works

It runs your float through a Python format string and outputs the result as text. The default {:.6g} means "up to 6 significant digits, in whichever notation is shorter" - so 0.75 stays "0.75", 3.0 becomes "3", and long tails get cut off cleanly. g is a good default because it drops trailing zeros.

Common alternatives:

• {:.2f} - fixed two decimal places (0.75 → "0.75", 3 → "3.00").
• {:.4f} - four decimals, when you need more precision in the text.
• {:g} - shortest sensible representation, no fixed digit count.

If you know Python format specs, they behave exactly as expected here.

The inputs and outputs that matter

• value (FLOAT) - the number to convert. Default 0.
• format_string (STRING) - the format, default {:.6g}. This is the knob that matters; switch to {:.2f} when you want a fixed number of decimal places.
• Output: STRING - the formatted text.

How to install it

Part of jamesWalker55/comfyui-various, a pack of small utility nodes.

• ComfyUI Manager: search "Various ComfyUI Nodes by Type", install, restart. Node came in red? Install Missing Custom Nodes.
• Manually:

  cd ComfyUI/custom_nodes
  git clone https://github.com/jamesWalker55/comfyui-various
  

  Restart afterward. No models, no dependencies.

Find it under the jamesWalker55 category after restart.

Common issues

• The output still has a decimal point I didn't want. If you're putting a float into a filename, a . in the middle is often fine, but some tools dislike it. Either use a format that avoids it, or convert to an integer first with JWFloatToInteger and format that with JWIntegerToString instead.
• Format string errors. The spec has to match a float - {:.2f} and {:.6g} are valid; an integer spec like {:04d} will throw because the value isn't an int. If you need integer-style padding, convert to int first.
• Too many / too few digits. That's the .6 (significant digits) or .2f (decimal places) part of the format. Turn it up or down to taste.
• Node is red / missing. The pack isn't installed. Install via Manager or clone the repo, then restart.

It's the mirror of JWStringToFloat: that one reads a number out of text, this one writes a number into text. Together they let you round-trip values through the string side of a graph.