CSS Formatter One Line

This tool formats CSS into a single line. It accepts multi-line CSS blocks, including selectors, declarations, and at-rules, and outputs an equivalent string with normalized whitespace suitable for inline styles, code snippets, or documentation. It is designed for frontend developers, UI engineers, technical writers, and teams that frequently embed CSS in HTML attributes, Markdown examples, or API docs. By producing a deterministic one-liner, it reduces drift between examples and actual code.
Conceptually, the formatter tokenizes the input into selectors, blocks, and declarations, then reconstructs them into a single line. It preserves the semantic relationships (selector { declarations }) and enforces standard punctuation spacing while removing unnecessary line breaks. Optional advanced modes include alphabetical property sorting and optional comment retention, which aid consistency in diffs and learning materials.
Core features and behavior: reliable one-line output; robust handling of common CSS constructs (media queries, block-like regions); deterministic results; and safe handling of malformed input by best-effort reformatting. It is not a minifier and does not aggressively compress values beyond whitespace normalization. It can also be used as a teaching aid to demonstrate compact syntax.
Use cases span inline style attributes in HTML, documentation samples, component libraries, design systems, and PR workflows. The tool saves time, reduces manual editing, and improves readability in diffs. Its non-branded, standards-focused approach helps teams ensure consistent CSS representation across environments.