JS Minifier / Beautifier

The JS Minifier / Beautifier compresses JavaScript down to the smallest equivalent text, or expands cramped one-liners back into clean, indented code you can actually read.

Minifying strips comments and collapses every run of insignificant whitespace, keeping only the single spaces that JavaScript genuinely needs between keywords and identifiers.

The tool tokenises your source first, so string literals, template literals and regular-expression literals are copied through untouched — a slash inside a regex character class or a double slash inside a string will never be mistaken for a comment, and the whitespace inside a template literal is preserved exactly.

Beautifying does the reverse: it re-indents braces and brackets, puts statements on their own lines and applies a consistent two- or four-space indent so a minified bundle becomes legible again.

The two directions round-trip cleanly, which makes the tool handy for inspecting third-party snippets, tidying code pasted from chat, or quickly estimating how much a file shrinks.

This is a deliberately lightweight lexical pass rather than a full compiler, so it does not rename variables, fold constants or remove dead code — the output is always a faithful, equivalent rewrite.

Everything happens locally in your browser; your code is never uploaded, logged or stored, and the tool keeps working offline once the page has loaded.