Is Font Size Converter free to use?

Yes, Font Size Converter is completely free to use. No registration or login required — all features are available directly.

Does Font Size Converter upload my data to a server?

No. Font Size Converter uses pure front-end technology. All processing happens in your browser — no data is uploaded to any server. The tool works even without an internet connection.

Can I use Font Size Converter on my phone?

Yes. Font Size Converter is fully responsive and works on phones, tablets, and desktops. The interface automatically adapts to your screen size.

Do I need to install any software to use Font Size Converter?

No. Font Size Converter is an online tool — just open the webpage in your browser. No downloads, plugins, or installations needed.

Is my data safe when using Font Size Converter?

Yes. Since all data is processed locally in your browser and never sent to any server, there is no risk of data leakage. Your data stays under your control at all times.

Are there any usage limits for Font Size Converter?

Font Size Converter is a free online tool with no usage limits. Since processing is done locally, performance depends on your device. For very large files, we recommend processing in batches for the best experience.

Free Online Font Size Converter

Free online font size converter. Convert between PX, EM, REM, PT, and Percent instantly. Essential for responsive web design. Try now!

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Updated: 2026-07-11

How to Use

Enter a font size value, select the source unit (PX/EM/REM/PT/%), and set the base font size (default 16px).

All equivalent values are calculated instantly with formulas. Essential for responsive web design.

What is a Font Size Converter?

Font Size Converter is a free online tool that runs entirely in your browser. Enter a value in PX, EM, REM, PT, or Percent and instantly see the equivalent in all other units, based on your base font size. No download or signup needed — all data is processed locally on your device.

Common Use Cases

Convert PX to EM/REM when writing responsive CSS media queries
Translate point sizes (PT) from print design into screen-friendly pixel values
Keep typography scalable and accessible with EM and REM units
Quick unit conversions on mobile without searching for formulas

Key Features

Completely Free: No registration, no limits
Privacy Safe: Data never leaves your browser
Cross-Platform: Any modern browser
Zero Dependencies: Open and use

🔤 Font Size Converter

How to Use

What is a Font Size Converter?

Common Use Cases

Key Features