PX to REM Converter — Markeir

Instantly convert pixel values to REM with a custom base font size. Fast, clean, and built for developers. No ads, no tracking.

PX to REM Converter — your developer toolbar shortcut for instant CSS unit conversion.

Stop the mental gymnastics. Click the icon, type a pixel value, and instantly see the REM equivalent — right from your Chrome toolbar.

⚡ What it does

Type any pixel value and the extension immediately shows you the exact REM equivalent based on your configured root font size. The default is 16px — matching the browser — but you can set your project's actual base and it's remembered automatically.

🛠 Features

• Real-time conversion — result updates as you type
• Configurable root font size (10px, 16px, 18px — your call)
• Quick-pick buttons for common values like 8, 12, 16, 24, 32
• Reference table with 20 pre-calculated PX/REM pairs
• One-click copy to clipboard
• Formula display so you always see the math
• Works fully offline — no internet ever needed

🔒 Zero data collection. No analytics, no tracking, no network requests, no ads — ever. The only permission used is storage, to remember your root font size locally.