WhatFont focuses on identifying the fonts used on webpages without inspecting source code manually. It is catalogued under Browser DevTools & extensions on PulseGate.

Who should use WhatFont?

WhatFont is an open-source project built for web designers and developers.

Does WhatFont have a free plan?

Yes — WhatFont is open source under the Open Source license and free to use.

What platforms does WhatFont run on?

WhatFont runs on the web and embeddable surfaces. It can also be self-hosted.

Is WhatFont still active?

Unverified. WhatFont has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

Who develops WhatFont?

WhatFont is developed by Chengyin.

When did WhatFont launch?

WhatFont first shipped in 2018.

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WhatFont

Name: WhatFont
Author: Chengyin

github.comInfrastructure

WhatFont is an open-source browser tool for identifying fonts used on webpages. It provides the core bookmarklet code for inspecting typography directly in the browser and is intended for web designers and developers.

Open SourceWebEmbeddableSelf-hosted

Visit github.com

Overview

4 features

In the Browser DevTools & extensions space, WhatFont takes a focused approach. It focuses on identifying the fonts used on webpages without inspecting source code manually. WhatFont is an open-source project aimed at web designers and developers. WhatFont is open source under the Open Source license. WhatFont is available on the web and embeddable surfaces, and it can be self-hosted.

Behind WhatFont is Chengyin, and it first shipped in 2018. Among its 4 catalogued features are font identification, bookmarklet interface, and browser inspection.

Summary written by a language model from the project’s public pages.

Font identification
Bookmarklet interface
Browser inspection
Webpage typography

Built with & integrations

Runs on

BrowserEmbeddableSelf-hosted

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed7 Sep · 23:35 UTC
WhatFont verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about WhatFont

What is WhatFont?: WhatFont focuses on identifying the fonts used on webpages without inspecting source code manually. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use WhatFont?: WhatFont is an open-source project built for web designers and developers.
Does WhatFont have a free plan?: Yes — WhatFont is open source under the Open Source license and free to use.
What platforms does WhatFont run on?: WhatFont runs on the web and embeddable surfaces. It can also be self-hosted.
Is WhatFont still active?: Unverified. WhatFont has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
Who develops WhatFont?: WhatFont is developed by Chengyin.
When did WhatFont launch?: WhatFont first shipped in 2018.
Is WhatFont open source?: Yes — WhatFont is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 7 Sep 2026
Built for: web designers and developers
Model: Open source
Solves: Identifying the fonts used on webpages without inspecting source code manually.

Registered as

Firefox Add-ons: zjm-whatfont

Developer

Chengyin

Index record

Indexed: 7 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 7 Sep 2026

Identity audit (13)

Slug: whatfont-github-com
Lifecycle last checked: 8 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 7 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 7 Sep 2026
Canonical URL: https://github.com/chengyin/WhatFont-Bookmarklet

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