CSS Box-Shadow Generator
Reads one JSON object with x, y, blur, spread, color and inset values, then returns a single CSS box-shadow declaration. It does not render a preview or combine multiple shadows.
About this css box-shadow generator
Reads one JSON object with x, y, blur, spread, color and inset values, then returns a single CSS box-shadow declaration. It does not render a preview or combine multiple shadows Transforms and validates developer data structures locally, preventing confidential payload exposure during data wrangling.
Syntax parsing & data transformation logic
Reads an optional JSON configuration for inset, x, y, blur, spread and color, applies fixed defaults and type checks, then emits one CSS box-shadow declaration.
Worked conversion & output example
Scenario: Format one box-shadow declaration from the documented JSON object.
Sample input:
Processing: Read finite numeric fields over defaults and emit one declaration; no preview or color parser runs.
Illustrative output:
Syntax constraints & input size limits
The tool emits CSS text only. Negative blur is rejected, while negative spread is allowed. It does not parse color syntax, render a preview or test browser support; inspect the declaration before use.
Data conversions and formatting in CSS Box-Shadow Generator reflect standard structured syntax. Verify parsed outputs against your target runtime before deployment.
Local client execution boundary
Data parsing and transformations in CSS Box-Shadow Generator execute in the local browser tab without remote data transmission.
Data format specifications & language standards
Data interchange formats and language grammar specifications:
CSS Box-Shadow Generator verification · Audit standards
How to use it
- Enter a JSON object with optional x, y, blur, spread, color and inset fields.
- Apply fixed defaults, require finite numeric x, y, blur and spread with blur nonnegative, nonempty color text, and Boolean inset.
- Read one CSS `box-shadow` declaration.
Frequently asked questions
How is a box-shadow declaration assembled?+
It parses a JSON configuration over fixed defaults and requires finite numeric x, y, blur, and spread values plus a non-empty color and boolean inset. It then formats one CSS box-shadow declaration.
What is the verified inset shadow output?+
The configuration x 2, y 4, blur 6, spread 1, color #123456, and inset true returns box-shadow: inset 2px 4px 6px 1px #123456;.
Which visual effects are outside the generator?+
It does not render a preview, validate color syntax against CSS parsing, combine multiple shadows, calculate contrast, inspect layout, or optimize values for a particular browser or component.
How are omitted configuration fields handled?+
Valid object fields override defaults; omitted fields keep the built-in values. Non-object JSON, non-finite numbers, negative blur, empty color or non-Boolean inset causes an error. Negative spread remains allowed.