Chrome Extension · Manifest V3 · No tracking in the extension

Preview & swap
fontson any website — instantly.

Try any typeface live on the page you're looking at — without touching code. 300+ Google Fonts, your system fonts, presets, per-domain rules, and copy-ready CSS / SCSS / JS.

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Copy-ready CSS / SCSS / JS 9 languages Free + optional Pro
https://your-favourite-site.com

Typography you can feel

Change the heading and the body text independently — pick a display face for titles and a comfortable reading face for paragraphs, then watch them pair up live, right on the page. This is exactly what Wolfie Font Swapper does on any site you visit.

Mockup — the actual popup may vary slightly by version.
Everything in one popup

A full type toolkit, on every tab

Designed for designers and developers who want to judge a font in context — on the real page, with real content.

Searchable font picker

Start typing and the list filters instantly. Popular Google Fonts are pinned to the top with a ★, so you reach the good stuff first.

Target what you want

Independent fonts for the whole page, headings (h1–h6), paragraphs, navigation and buttons.

Fine-tune with one tap

Quick chips for weight, letter-spacing, size, line-height and letter case.

Presets

Save your favourite looks and switch between them — they persist across sessions. Unlimited with Pro.

Copy-ready snippets

Grab the exact CSS, SCSS or JS — the font files are embedded so the preview works even under strict CSP.

System fonts

With your permission, browse and apply fonts actually installed on your machine — names only, kept on your device.

Persistent per-domain presets

Optional: pin a custom preset to specific domains — it's saved persistently and auto-applies every time you return. A green dot marks tabs with an active rule.

9 languages

PL · EN · FR · DE · ES · UK · RU · RO · IT. Follows your browser; switchable in Options.

Three taps

From curiosity to copy-paste

1

Open on any page

Click the toolbar icon or hit Ctrl+Shift+L. The popup opens over the page you're reading.

2

Pick & tweak

Search a font, set it per section, adjust weight, spacing and size. The page updates live as you go.

3

Save or copy

Store it as a preset / per-domain rule, or copy the generated CSS, SCSS or JS straight into your project.

See it

Clean popup, real results

Everything happens in a compact, themed popup — no dashboards, no detours.

The Wolfie Font Swapper popup
The popup — sections, chips & presets
Live font swap
Live font swap
License tags
License tags at a glance

Screenshots may differ slightly from the extension depending on the version.

Know what you're using

Every font carries a license tag

So you never ship a typeface you can't legally use. Tags are shown right next to each font.

Web-safe

Always available

Stack staples like Arial, Georgia, Times — render everywhere, zero loading.

Free

Open licensed

Google Fonts under OFL / Apache 2.0 — free for commercial use, embed-friendly.

Premium

Buy to use

Commercial typefaces shown by name with a link to license them from the foundry.

System

Your machine

Fonts installed locally — detected by name, applied for preview, kept on your device.

Pricing

Free to use. Pro when you want more.

The core toolkit is free forever. Pro unlocks unlimited presets and is handled securely by ExtensionPay (Stripe).

Free

$0 / forever
  • Full font picker — Google + system
  • Per-section targeting & chips
  • Copy CSS / SCSS / JS
  • Per-domain rules · 9 languages
  • A handful of presets
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Pro

Unlimited presets
  • Everything in Free
  • Unlimited presets
  • Support ongoing development
  • Secure checkout via ExtensionPay / Stripe
Go Pro
Questions

Good to know

Does it collect any data? +
No. There's no analytics, no accounts and no server owned by us. Your selections, presets, per-domain rules and language are stored locally in your browser. See the privacy policy.
Why does it run on all sites? +
So your saved per-domain font rules can auto-apply when you revisit a site, and so the popup opens on any page. It only reads the page's hostname to match your rules and injects CSS — it never reads or sends page content.
Can I keep a custom font setup per website? +
Yes — it's optional. Pin a custom preset to specific domains and it's saved persistently, auto-applying every time you revisit those sites. A green dot on the toolbar icon shows when a domain rule is active; you can remove it anytime from the popup.
Where do the fonts come from? +
Google Fonts are fetched from Google's public endpoints only when you preview them. System fonts are read by name (with your one-time permission) and stay on your device.
How does Pro payment work? +
Pro is handled by ExtensionPay, which uses Stripe. Your email and payment details are processed on their servers — the developer never sees your card data. The free tier never contacts ExtensionPay.
Which browsers are supported? +
Chrome and Chromium-based browsers (Edge, Brave, Opera) that support Manifest V3 extensions.

Make the web your type.

Install Wolfie Font Swapper and preview any font, on any page, in seconds.

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