PX to REM

Convert px to rem and rem to px instantly. Set your own base and copy the result in one click. Fast, minimal, offline.

PX to REM is a tiny, fast CSS unit converter that lives in your toolbar. Type a pixel value, get the rem result instantly — no button to press, no page to load. Switch direction to convert rem back to px in one click, and set your own root font size (1rem = 16px by default). Click the result to copy it to your clipboard. Key features ✔ px → rem and rem → px, one toggle ✔ Live conversion as you type — no "calculate" button ✔ Adjustable base (1rem = any px value, 16 by default) ✔ Click the result to copy it instantly ✔ Remembers your base and direction between sessions ✔ Clean, minimal interface — works fully offline How to use 1) Click the PX to REM icon in your toolbar 2) Enter a value — the result appears instantly 3) Click the result to copy it No account. No tracking. No data leaves your device.