Integer to String

The reason most people land on this node: they want a number in a filename, and they want it to look like 0042, not 42. JWIntegerToString turns an INT into a STRING, and the format string it gives you is where the zero-padding lives. That padding is the whole appeal - it's what makes frame_1, frame_2, … frame_10 sort correctly as frame_0001, frame_0002, … frame_0010 in a file browser or a video encoder.

You'll reach for it any time a number needs to become text: building a save path, labelling an output, gluing a counter into a string with a concat node. On its own an integer can't plug into a string socket - this node is the adapter, and it lets you control exactly how the number reads.

How it works

It takes your integer and runs it through a Python format string, then outputs the result as text. The default {:04d} means "this integer, at least 4 digits wide, zero-padded on the left." So 42 → "0042", 7 → "0007", 12345 → "12345" (it doesn't truncate - the width is a minimum, not a maximum).

A few format strings worth knowing:

• {:04d} - zero-pad to 4 digits (the default). Use {:06d} for 6, and so on.
• {:d} - plain, no padding (42 → "42").
• {: d} or a prefix in the string - you can wrap extra characters around it, e.g. frame_{:04d} → "frame_0042".

If you know Python's format spec, it all works the way you'd expect.

The inputs and outputs that matter

• value (INT) - the number to convert. Default 0.
• format_string (STRING) - the format, default {:04d}. This is the knob that matters; change the digit count to change the padding width.
• 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. Red node in a downloaded workflow? Install Missing Custom Nodes.
• Manually:

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

  Restart afterward. No models, no dependencies.

Under the jamesWalker55 category after restart.

Common issues

• The format string throws an error. The {...} has to be a valid Python format spec. {:04d} is fine; something like {:04} without the d, or a stray brace, can error or produce odd output. When in doubt, start from the default and only change the number.
• I put a float in and it broke. This node expects an integer - the d in {:04d} is the integer format code. For decimals use JWFloatToString with a float-style format like {:.2f}.
• My padding vanished. If your number is already wider than the pad width (say 12345 with {:04d}), you get all five digits - padding only adds leading zeros, it never trims. Widen the spec if you need more.
• Node is red / missing. The pack isn't installed. Install via Manager or clone the repo, then restart.

Pair it with JWStringConcat to build things like "render_" + "0042" + ".png", and you've got clean, sortable output names without a scripting node in sight.