justif is a tool focused on delivering publication-grade text justification for web content. It addresses the need for advanced typographic control in browsers, offering features that aim to improve the visual quality of text rendering online.
The tool includes several capabilities such as hyphenation, protrusion, expansion, tracking, last-line spacing adjustments, minimum last-line width, and hanging punctuation. It provides options to compare text rendering, including a side-by-side view of browser output with controls and metrics, as well as a 'blur' or 'squint test' for evaluating spacing. Margin rulers and the ability to reset display appearance are also present. justif supports a variety of typefaces, including Junicode, EB Garamond, Alegreya, IM Fell English, Vollkorn, Amstelvar, Latin Modern (TeX), Georgia, Roboto Flex, Courier Prime, IBM Plex Mono, and system fonts in both serif and mono styles. The tool accommodates different languages and scripts, including right-to-left languages such as Hebrew and Arabic, and Japanese text samples.
It is delivered as a web-based application, accessible through a browser interface. Users can interact with various text samples and adjust typographic settings directly within the tool. There is no explicit mention of pricing, licensing, or user roles in the available information.
justif is an UI/UX & prototyping product. It focuses on enabling designers and developers to achieve publication-grade text justification in web browsers. It is built as a consumer product for web designers and developers. The product is available for free. It runs on the web.
Behind justif is Lyall Couper, and the product first shipped in 2026. Development happens publicly on GitHub with 83 commits in the last 90 days. Key capabilities include text justification, side-by-side rendering, and hyphenation.
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