CSS may be the second-most-formatted language on the web after JSON. Whether you are inspecting a minified bundle from a third-party SDK, normalising styles inherited from a legacy stylesheet, or simply prettifying a snippet someone pasted into chat, having a fast browser-based formatter pays off many times a day. The CSS Tools hub on Ai2Done collects formatters tuned for CSS dialects and related stylesheet languages, all running locally via WebAssembly.
The core flow is straightforward: paste minified or messy CSS, choose two-space / four-space / tab indentation, and receive a clean, idiomatic stylesheet ready to read or commit. The formatter understands modern CSS — custom properties, container queries, nesting, layers — and preserves comment structure where reasonable. The complementary minifier produces a tight, single-line bundle suitable for inline embedding or transmitting over the wire.
The hub deliberately remains focused on stylesheet languages. For HTML, JS and other web formats, the Format Tools and Dev Tools hubs cover broader needs. For colour conversions (HEX ↔ HSL, sRGB ↔ OKLCH) and gradient generators we recommend specialised tools; the CSS Tools hub keeps a tight remit so the tools that are here are reliable and fast.
Privacy follows the rest of Ai2Done: the paste never leaves your device, no quota, no logging. The Wasm binaries are small (typically <300 KB after Brotli) so the tools work well even on slow connections. We add new formatters in this hub as community demand justifies; let us know via the contact page if your stylesheet dialect is missing.
For day-to-day workflows, the most useful pairing is the CSS Tools hub with the Format Tools hub (when you also need JSON / XML / YAML formatting in the same session) and with the Dev Tools hub for utilities like SQL formatting or HTML escaping. Power users pin all three as a tab group; the static asset footprint is small enough that this is essentially free.