Outils de développement
Convertisseur PX en REM
Convert CSS pixels to rem (and back) with a customizable root font size.
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Convertisseur PX en REM is a free online tool that convert CSS pixels to rem (and back) with a customizable root font size.
Rem units scale with the root (html) font size, usually 16px in browsers. Converting px to rem keeps spacing and type fluid when users change default font size or you adjust a design system base.
Enter pixels or rem values and a root size to get matching CSS. Useful for Tailwind, custom properties, and accessible typography.
How to use this converter
- Set your root font size (default 16px).
- Type a pixel or rem value — the other field updates automatically.
- Copy the CSS snippet into your stylesheet.
The Convertisseur PX en REM is built for speed and privacy: convert CSS pixels to rem (and back) with a customizable root font size. Typical use cases include everyday personal tasks, student assignments, freelance deliverables, and quick checks at work when you cannot install desktop software. Because files and text often stay in your browser, it is a practical choice on shared or locked-down computers.
Benefits of using this free browser tool include zero install, instant results, unlimited use on the Free plan, and compatibility with phones, tablets, and laptops. Bookmark this page to return anytime, and pair it with related tools in the same category when your workflow needs multiple steps.
Faits clés sur le {nom}
| Fact | Detail |
|---|---|
| Tool | Convertisseur PX en REM |
| Price | Free to use on Mytulify |
| Signup required | No |
| Processing | In your browser (client-side) |
| Daily limit (Free) | Unlimited |
Questions fréquemment posées
What root size should I use?
Most sites use 16px. If your html { font-size } differs, enter that value so rem math matches your design.
Is rem the same as em?
Rem is relative to the root element; em is relative to the parent’s font size. This tool treats both as equal only when the parent matches the root.