Whitespace Rhythm Checker
Paste CSS or plain text, choose a positive base unit, and review extracted px/rem values with transparent divisibility results.
A QUICK WALKTHROUGH
How to use this tool
- Paste CSS or text containing px or rem values.
- Enter a positive base unit in the same unit.
- Review each extracted value and its quotient or remainder.
Numeric rule only
The checker extracts numeric px and rem tokens and tests whether each value is an integer multiple of your base within a small decimal tolerance.
No visual judgment
A passing result does not assess visual consistency, layout quality, accessibility, or design intent.
GOOD TO KNOW
Common questions
Can px and rem be mixed?
Values are checked within their own unit; the base unit applies to matching px or rem tokens.
Does it rewrite CSS?
No. It reports values only and does not modify the pasted text.