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Finds legal open-access versions of paywalled research. In memory of Aaron Swartz (1986–2013). Aaron — Public Knowledge Unblocker Hit a paywall on an academic paper? Aaron checks if a free, legal open access version exists and shows you a link — right on the page. HOW IT WORKS When you visit an academic publisher or repository, Aaron extracts the paper's DOI and queries the OpenAlex database for open access copies. If one exists, a small panel appears with direct links to the free version. Works across major academic publishers and any site with a DOI. FEATURES - Automatic DOI detection on publisher pages - Queries OpenAlex (open, CC0-licensed database) for open access versions - Direct links to free PDFs and repository copies - Session caching — revisiting a paper is instant - Dark, non-intrusive panel that stays out of your way PRIVACY - Zero data collection - No accounts, no API keys, no tracking - No analytics or telemetry - The only network request is to OpenAlex's public API - All processing happens locally in your browser Free and open source. Named in memory of Aaron Swartz.
Feb 28, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.