WCAG CheckSize ConverterLive PreviewFree
PX
16.0px
REM
1.000rem
EM
1.000em
PT
12.0pt

WCAG Assessment

Body text (min 16px)
Minimum readable (min 12px)
WCAG "Large text" (18pt+ or 14pt+ bold)
WCAG AAA large text threshold (24px+)

Preview

The quick brown fox jumps over the lazy dog. 0123456789

Frequently Asked Questions

What is the minimum recommended font size?
WCAG recommends body text be at least 16px (1rem). Smaller text is harder to read, especially for users with low vision.
What units should I use?
Use relative units like rem or em for font sizes. They scale with user browser settings, improving accessibility.
What about line height?
WCAG recommends a line height of at least 1.5 for body text to improve readability.
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About Font Size Check

Font Size Check solves a specific problem that comes up daily for anyone dealing with developer and design work: doing it once, fast, without an account. Built to be the kind of tool you bookmark and use weekly: no surprises between visits, no degraded free tier, and a UI that gets out of the way. It pairs naturally with the other developer utilities here when you need to chain a quick workflow.

When you'd reach for Font Size Check

  • You need to handle a one-off task right before a meeting and don't have time to install anything.

    Anyone working remotely on a borrowed or restricted machine.

    Open the page, get the result, paste it into your doc — under a minute.

  • You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.

    Marketers and ops people whose primary tool is metered.

    Stay productive without burning credits.

  • You're on a public or shared machine and don't want to leave traces of what you're working on.

    Travelers, contractors, anyone working from a friend's computer.

    Nothing is uploaded, nothing persists if you're not signed in.

  • You're cleaning up a folder of files that accumulated over a project and need to standardize them.

    Designers, writers, and developers wrapping up deliverables.

    Drop each file in, copy the output, move on.

Frequently asked about Font Size Check

What browsers does Font Size Check support?
Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
Is Font Size Check really free?
Yes — Font Size Check is free for unlimited personal use, with no account required and no watermark on the output.
Does Font Size Check work on mobile?
Yes, Font Size Check is fully responsive and tested on iOS Safari and Android Chrome.
Are my files uploaded to a server when I use Font Size Check?
Font Size Check processes everything in your browser using local APIs. Your files never leave your device.
Can I use Font Size Check commercially?
Yes. The output of Font Size Check belongs entirely to you, with no licensing restrictions.

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