Readability (software)

Readability (software)
Name	Readability
Developer	Arc90 Labs; later Readability LLC
Released	2009
Operating system	Web, iOS, Android
Genre	Content extraction, web annotation
License	Proprietary (later discontinued)

Readability (software) was a web-based application and browser bookmarklet developed to simplify online articles by extracting main content and removing peripheral elements. The project originated from Arc90 engineers influenced by research at MIT Media Lab and discussions among participants from O’Reilly Media, Wired (magazine), and The New York Times Company about improving web typography and user experience. Readability influenced later initiatives such as Instapaper, Pocket (application), and reader modes in Mozilla Firefox, Google Chrome, and Apple Safari.

Overview

Readability aimed to present a streamlined, readable view of web pages by isolating article text and core images while discarding navigation, advertisements, and widgets. Its approach built on academic work like the Boilerpipe (software) project and practical tools from Arc90, which drew on methods described in papers from Stanford University, Carnegie Mellon University, and University of California, Berkeley. The software provided a one-click interface via bookmarklet and extensions compatible with browsers such as Mozilla Firefox and Google Chrome, and integrated with services offered by companies including Twitter and Facebook (company) for sharing.

History and Development

The service began as a 2009 experiment by Arc90 staff responding to debates at conferences like SXSW and Strata Conference about web readability and typography. Early contributions came from engineers associated with MIT Media Lab and researchers formerly affiliated with Lucid (company) and Yahoo! Research. Over time the project attracted attention from editors at The Atlantic, Slate (magazine), and The Guardian, and discussions with executives from Apple Inc., Google LLC, and Microsoft Corporation influenced reader-mode features. Readability later reorganized under Readability LLC with participation from entrepreneurs who had worked at Betaworks, AOL, and Twitter, Inc. before the service discontinued its original bookmarking product in the mid-2010s.

Features and Functionality

Readability provided article extraction, typographic customization, and offline reading with synchronization across devices, similar to features in Instapaper and Pocket (application). It offered font size, line spacing, and margin adjustments inspired by typographic advocacy from figures associated with A List Apart and Typekit, and allowed users to save articles for later consumption and send them to e-readers such as Amazon Kindle and devices influenced by Barnes & Noble. The bookmarklet performed DOM traversal and content scoring resembling algorithms cited in publications from Stanford University and University of Waterloo, while browser extensions integrated with APIs used by platforms like Facebook (company), Twitter, Inc., and LinkedIn.

Supported Platforms and Integrations

Initially available as a bookmarklet for browsers including Mozilla Firefox and Google Chrome, Readability expanded to native apps for iOS and Android (operating system), integrating with services such as Dropbox, Evernote, and Pocket (application)-adjacent ecosystems. The project interoperated with e-reading workflows involving Amazon Kindle and with social sharing endpoints used by Twitter, Inc., Facebook (company), and Tumblr (service). Enterprise and developer interest brought conversations with engineering teams at Microsoft Corporation and researchers at IBM Research about potential API-based integrations.

Technology and Algorithms

The core extraction algorithm combined heuristics for DOM distance, text density, and link-to-text ratios influenced by academic work at University of Waikato and open-source projects like Boilerpipe (software). Readability’s engine performed node scoring, sibling merging, and noise reduction using techniques described in papers from Carnegie Mellon University and implementations shared by contributors from Arc90 and researchers formerly at Yahoo! Research. Client-side bookmarklets executed JavaScript compatible with WebKit and Gecko engines, aligning with standards from WHATWG and the World Wide Web Consortium. The service logged anonymized usage statistics for performance tuning, an approach similar to telemetry used by Mozilla Foundation and Google LLC.

Reception and Impact

Readability was praised in reviews by outlets such as Wired (magazine), The Verge, and The New York Times for improving reading comfort and inspiring reader-mode features in major browsers. Critics debated its approach to monetization and content attribution in conversations that involved editors from The Guardian, The Atlantic, and The New Yorker (magazine), and legal discussions touched upon policies referenced by organizations like Electronic Frontier Foundation and Creative Commons. The project influenced development at Mozilla Foundation, Apple Inc., and Google LLC, and helped popularize simplified article views that now appear in Safari (web browser), Firefox, and Chrome.

Licensing and Availability

Readability’s original codebase and bookmarklet were released with varying licensing terms during its lifespan, with portions remaining proprietary under Readability LLC while community tools adopted open-source licenses inspired by projects at GitHub and SourceForge. After discontinuation of core services, community forks and related libraries persisted in repositories maintained by developers affiliated with Betaworks, Arc90, and contributors connected to Open Source Initiative-backed projects. Availability shifted over time as proprietary components ceased operation and open-source extraction libraries continued under licenses used by projects hosted on GitHub.

Category:Web software