Simple Float Slider [LP]

This one's not doing anything a plain FLOAT input couldn't do numerically - it's a UI convenience. Instead of typing a number into a spinbox, you drag a horizontal bar between 0.0 and 1.0. That's a nicer control surface when you're live-tweaking something and want the tactile feel of dragging rather than clicking into a field and typing digits.

Where a slider actually beats a number field

Anywhere you're iterating by feel: dialing in a denoise strength, a LoRA weight, a blend or opacity factor, anything you'd normally nudge up and down a few times while watching the output change. A number field works fine too, but a slider makes the "nudge and re-run" loop a little faster and a little more visual - you can see roughly where you are in the 0-to-1 range at a glance, which a bare numeric widget doesn't give you.

The inputs and outputs that matter

• number - the slider itself: min 0, max 1, step 0.000001 (effectively continuous, not chunky steps).
• Output - a single FLOAT in that 0.0-1.0 range.

That range is fixed. Per the pack's own README, the min and max "cannot be changed on the interface" - this is deliberately a locked 0-to-1 control, not a general-purpose float widget. If you need a different range, this specific node isn't the tool; use a regular FLOAT primitive where you set your own min/max instead.

The other two sliders in the pack, and a caveat that applies to them

The README mentions this node ships alongside two step-quantized siblings - "Simple Float Slider - Tenths Step" and "Simple Float Slider - Hundredths Step" - for when you want coarser, snap-to-grid dragging instead of a continuous 0-to-1 range. Worth knowing if you go looking for them: the README specifically flags that those two "work correctly only if you have not changed the value of 'Float widget rounding decimal places' in the ComfyUI settings." If you've customized that global ComfyUI setting for other reasons, those two sliders can behave oddly - reset it to 0 if that's biting you. This base slider (the one covered here) states its step directly rather than relying on that global setting, so it isn't affected by that particular caveat.

How to install it

ComfyUI Manager: search "ComfyUI Level Pixel" or ComfyUI-LevelPixel, install, restart - auto-updates through Manager's "Update ALL." Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/LevelPixel/ComfyUI-LevelPixel.git

Restart ComfyUI. Pure UI/logic node, no models, nothing extra to install. (Credit where it's due: the pack's README notes the core functionality here is taken from comfyui-mixlab-nodes, folded into Level Pixel's own set.)

Common issues & troubleshooting

You want the slider to go outside 0-1. It can't, from the interface - this node's range is hardcoded. Swap to a standard FLOAT input widget if you need a wider or narrower range.

Dragging feels too twitchy for coarse adjustments. That's expected given the near-continuous step size - for chunkier, more deliberate increments, look for the pack's "Tenths Step" or "Hundredths Step" slider variants instead, keeping the decimal-rounding caveat above in mind.