Paper links to free PDFs

Checks for Google Scholar, Sci-Hub, LibGen, Anna's Archive, Sci-net, Semantic Scholar, Unpaywall, CORE, and EuropePMC links only when you hover over a link.

Install this script ?

Ask a question, post a review, or report the script.

Author: BuiQuocDung1991
Daily installs: 0
Total installs: 8
Ratings: 0 0 0
Version: 1.6
Created: 2025-07-19
Updated: 2025-07-28
Size: 14.9 KB
License: AGPL-3.0-or-later
Applies to: All sites

This userscript enhances webpages by detecting DOI links and showing a popup with free PDF sources when you hover over them. It checks availability across Sci-Hub, LibGen, Anna's Archive, Sci-net, and Google Scholar. The popup is dynamically positioned near the mouse and neatly organized into four rows for clarity. It works on all websites and only activates on mouseover to reduce network load. The script is ideal for researchers seeking quick access to academic papers.
Note:
- in Facebook, please turn on annoyances filters in ublock to use this script