PX ⇄ REM converter
CSS units at any root size
Convert CSS sizes between px, rem, em, pt and percent at any root font size. Check what 18px is in rem — or the other way round — without doing the division in your head.
How it works
- Open the tool and add your file (or paste your text).
- Adjust the options — everything previews instantly.
- Download the result. Done.
Private by design
This tool runs 100% in your browser. Your files are never uploaded to a server, never stored, and never seen by anyone — close the tab and nothing remains.
Free, no limits
No account, no watermarks, no daily caps. If you also need full design tools, the Ijodly editor is one click away.
Frequently asked questions
Is PX ⇄ REM converter free to use?
Yes — PX ⇄ REM converter is completely free. There is no account to create, no watermark on your results and no daily limits.
Are my files uploaded when I use PX ⇄ REM converter?
No. PX ⇄ REM converter runs entirely in your browser. Your files never leave your device and nothing is stored on a server — close the tab and nothing remains.
Do I need to install anything or sign up?
Neither. Open the page, use PX ⇄ REM converter straight away and download your result. No install, no signup.