How does the neon glow effect work?

The neon preset stacks four blur-only shadows of the same color at increasing radius and decreasing opacity. Layering them produces the bloom of a real neon sign. It reads best on light text over a dark background.

What makes the retro 3D and long shadow effects?

Both stack many hard-edged shadows offset by one pixel each along the diagonal. Retro 3D uses a few layers for a chunky block, while long shadow uses many more to trail the text dramatically toward the corner.

Why does the preview background change with the effect?

Neon glows are only visible on a dark backdrop with light text, so the preview switches to dark for that preset. The other effects show on a light backdrop with dark text where their offsets are clearest.

Can text-shadow slow down rendering?

A single soft shadow is cheap. The long shadow effect can emit dozens of layers in one declaration, which is fine for a heading but should be used sparingly on many elements or during animation.

Does it create the CSS on a server?

No. The shadow string and preview are computed in your browser with JavaScript, so it works offline and your text and color choices never leave the page.

CSS Text Shadow Generator

The CSS Text Shadow Generator builds ready-to-paste text-shadow declarations for five common effects and shows them on live preview text. Whether you want a subtle lift on a card title or a glowing neon hero, it generates the correct multi-layer value for you.

How it works

Each preset assembles one or more shadow layers from your color and intensity. The blur-based glow and the offset-based stacks are built with simple formulas:

soft       : Ax Ay (A×1.2)blur rgba(color, .35)
neon       : 0 0 Ipx, 0 0 2Ipx, 0 0 4Ipx, 0 0 8Ipx  (fading opacity)
retro 3D   : 1px 1px 0, 2px 2px 0, ... up to I layers
long shadow: 1px 1px 0 ... up to 4×I layers
outline    : four hard shadows pushed to each diagonal corner

Layers are joined with commas into a single text-shadow value, exactly how the browser expects a stacked shadow.

Tips and notes

Keep neon text white or very light so the colored glow reads against the dark backdrop; for the offset effects, dark text on a light background shows the depth best. Long shadow looks striking on a single large heading but emits many layers, so avoid applying it to body copy or animating it across many nodes. The intensity slider scales every effect, so a value of 2 to 3 gives a refined look while 7 to 10 is bold and decorative.