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utils.sbs

Color & Design tool

Box Shadow Generator

Craft layered CSS box shadows visually.

Runs on-deviceNo sign-upFree
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Box Shadow Generator workspace

Workspace

Box Shadow Generator

Runs locally
px
px
px
px

Screen-accurate enough

Values are calculated on the fly. CMYK is an approximation for screen preview; use a colour-managed proof for print.

box-shadow
Values & CSS0 chars

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

Box Shadow Generator is a free browser-based color & design tool. Craft layered CSS box shadows visually. It runs with JavaScript and Canvas colour conversions locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is Box Shadow Generator?

Box Shadow Generator is a free browser-based color & design tool from utils.sbs. Craft layered CSS box shadows visually. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

CategoryColor & Design
InputHEX, RGB or HSL values, or an image for colour sampling
OutputCSS, JSON or a generated colour palette
EngineJavaScript and Canvas colour conversions
ProcessingIn your browser
PriceFree
AccountNot required

How Box Shadow Generator works

Colour values are converted with standard colour-space formulas and generated as CSS, design tokens or image palettes.

How to use Box Shadow Generator

  1. 1Open Box Shadow Generator and add your input.
  2. 2Adjust the options: x offset, y offset, blur, spread and more.
  3. 3Run the tool, check the preview or result, and download the output.

When to use Box Shadow Generator

  • Build a palette for a website or design system.
  • Convert colour values between HEX, RGB and HSL.
  • Check contrast or sample colours from an image.

Inputs and options

X offset
Enter a numeric value in px.
Y offset
Enter a numeric value in px.
Blur
Enter a numeric value in px.
Spread
Enter a numeric value in px.
Shadow colour
Set this value before running the tool.
Opacity
Set this value before running the tool.

Limitations

Screen colour and colour-space differences can change how values appear on other devices.

Privacy and accuracy

Box Shadow Generator processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

Box Shadow Generator questions

  • What can I do with Box Shadow Generator?

    Craft layered CSS box shadows visually. Box Shadow Generator is part of the Color & Design shelf on utils.sbs and is designed for quick, one-off tasks.

  • Is Box Shadow Generator free to use?

    Yes. Box Shadow Generator is free, requires no account, and has no per-file or per-use charge.

  • Are my files uploaded when I use Box Shadow Generator?

    No. Box Shadow Generator is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

  • What formats does Box Shadow Generator support?

    It accepts colour values and returns CSS, JSON or a generated palette that you can copy or download.

  • Can I use Box Shadow Generator on my phone?

    Yes. Box Shadow Generator is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

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