JavaScript Minifier

JavaScript minification reduces file size by removing content that doesn't affect how the code executes — comments and unnecessary whitespace, in this tool's case. More aggressive minifiers go further, renaming local variables to single letters and restructuring code to be more compact, but that requires fully parsing the JavaScript into an abstract syntax tree to know which identifiers are safe to rename without changing behavior.

Because JavaScript's syntax is context-sensitive — a / character can mean division or the start of a regular expression literal depending on what came before it, and string and template literals can contain characters that would otherwise look like comment delimiters — a minifier has to track that context carefully rather than just scanning for // and /* */ patterns naively. Getting this wrong is how a naive minifier can silently corrupt working code, for example by stripping something out of a string or misreading a regex as a comment.

This tool takes a deliberately conservative approach: it strips comments and collapses whitespace while staying aware of string, template literal, and, to the extent practical, regex context, but it never renames variables or restructures logic. That means it's safer to run on arbitrary code than a full build-tool minifier, at the cost of a smaller size reduction.