Easily access open-access versions of academic articles with the click of a button. Say goodbye to paywalls and hello to knowledge.
// ==UserScript==
// @name Academic Article Unlocker
// @match *://*/doi/*
// @match *://*/doiLanding*
// @match *://*/*?doi=*
// @match *://*.nlm.nih.gov/*
// @match *://www.nature.com/articles/*
// @match *://zenodo.org/record/*
// @match *://www.sciencedirect.com/science/article/*
// @match *://ieeexplore.ieee.org/document/*
// @match *://www.epistemonikos.org/*/documents/*
// @match *://psycnet.apa.org/record/*
// @match *://www.cdc.gov/mmwr/volumes/*
// @match *://iastatedigitalpress.com/jlsc/*
// @match *://www.researchgate.net/publication/*
// @match *://www.thelancet.com/journals/*
// @match *://www.nber.org/papers/*
// @match *://psycnet.apa.org/record/*
// @match *://www.cell.com/*/fulltext/*
// @match *://pubs.rsc.org/*/articlelanding/*
// @match *://*.biomedcentral.com/articles/*
// @match *://nowpublishers.com/article/*
// @match *://jamanetwork.com/*
// @match *://www.bmj.com/content/*
// @match *://*.aspetjournals.org/content/*
// @match *://philpapers.org/rec/*
// @match *://www.jci.org/articles/*
// @match *://www.computer.org/csdl/*
// @match *://muse.jhu.edu/pub/*
// @match *://muse.jhu.edu/article/*
// @match *://www.deepdyve.com/lp/*
// @match *://www.degruyter.com/document/doi/*
// @match *://www.nli.org.il/en/articles/*
// @match *://link.springer.com/*
// @match *://www.jstor.org/stable/*
// @match *://www.frontiersin.org/journals/*
// @match *://www.cambridge.org/core/journals/*
// @match *://annalsofglobalhealth.org/*
// @exclude *://annas-archive.org/*
// @grant none
// @version 3.1.7
// @author NoUser
// @description Easily access open-access versions of academic articles with the click of a button. Say goodbye to paywalls and hello to knowledge.
// @run-at document-end
// @namespace https://greasyfork.org/en/scripts/459616-academic-article-unlocker
// @homepage https://greasyfork.org/en/scripts/459616-academic-article-unlocker
// @license MIT
// ==/UserScript==
const ENABLE_SCIHUB = true; // Set to false to hide the Sci-Hub button
const SCIHUB_URL = "https://sci-hub.ru/"; // Change to your preferred Sci-Hub mirror
(function () {
"use strict";
function findDoi() {
for (const meta of document.querySelectorAll("meta")) {
if (
meta.name &&
[
"citation_doi",
"doi",
"dc.doi",
"dc.identifier",
"prism.doi",
].includes(meta.name.toLowerCase())
) {
const c = meta.content;
if (c && c.trim().startsWith("10.")) return c.trim();
}
}
const els = document.querySelectorAll("[data-doi]");
if (els.length === 1) {
const d = els[0].getAttribute("data-doi");
if (d && d.trim().startsWith("10.")) return d.trim();
}
const m = window.location.href.match(
/\b(10\.\d{4,9}\/[-._;()/:A-Z0-9]+)\b/i
);
return m ? m[1] : null;
}
async function getOpenAccessStatus() {
const doi = findDoi();
if (!doi) return {};
try {
const res = await fetch(
`https://api.unpaywall.org/v2/${doi}[email protected]`
);
if (!res.ok) return {};
return await res.json();
} catch {
return {};
}
}
function createButtonContainer() {
const container = document.createElement("div");
container.id = "article-unlocker-container";
const shadow = container.attachShadow({ mode: "closed" });
const style = document.createElement("style");
style.textContent = `
:host {
position: fixed;
right: 0;
bottom: 0;
z-index: 9999;
font-family: system-ui, sans-serif;
}
.unlocker-wrapper {
background: #fcfdfe;
border: 1.5px solid #e3e7ee;
border-radius: 18px 18px 0 0;
box-shadow: 0 0 16px 0 rgba(60,72,90,0.13);
min-width: 2px;
max-width: 320px;
margin: 0 12px 12px 0;
display: flex;
flex-direction: column;
align-items: stretch;
transition: transform 0.3s cubic-bezier(.4,1.4,.6,1), box-shadow 0.2s;
transform: translateY(0);
}
.unlocker-wrapper.collapsed {
box-shadow: none;
background: transparent;
border: none;
min-width: 0;
max-width: none;
margin: 0 16px 8px 0;
transform: translateY(calc(100% - 30px));
pointer-events: auto;
}
.toggle-button {
background: none;
border: none;
cursor: pointer;
padding: 8px 0;
margin: 0 auto;
display: flex;
align-items: center;
justify-content: center;
width: 100%;
transition: background 0.15s;
z-index: 2;
position: relative;
}
.toggle-arrow {
width: 40px;
height: 40px;
transition: transform 0.2s;
display: block;
margin: 0 auto;
}
.unlocker-wrapper.collapsed .toggle-arrow {
transform: rotate(180deg);
}
.button-group {
display: flex;
flex-direction: column;
padding: 8px 0 14px 0;
transition: max-height 0.3s, opacity 0.2s;
max-height: 800px;
opacity: 1;
}
.unlocker-wrapper.collapsed .button-group {
max-height: 0;
opacity: 0;
pointer-events: none;
padding: 0;
}
.access-link {
display: flex;
align-items: center;
gap: 12px;
padding: 12px 18px;
margin: 0 10px 6px 10px;
text-decoration: none;
font-size: 18px;
font-weight: 600;
color: #2d3748;
border-radius: 10px;
transition: background 0.13s, text-decoration 0.13s;
}
.access-link:visited {
color: #6b7280;
}
.access-link:hover,
.access-link:focus {
background: #f2f6fa;
text-decoration: underline;
}
.access-link img {
width: 45px;
height: 45px;
flex-shrink: 0;
}
.scihub-link span { color: #c00; }
.unpaywall-link span { color: #2CBB4C; }
`;
const wrapper = document.createElement("div");
wrapper.className = "unlocker-wrapper";
const toggle = document.createElement("button");
toggle.className = "toggle-button";
toggle.title = "Show/hide unlocker";
toggle.innerHTML = `
<svg class="toggle-arrow" viewBox="0 0 24 24">
<polygon points="12,16 6,9 18,9" fill="#6c757d"/>
</svg>`;
const group = document.createElement("div");
group.className = "button-group";
wrapper.append(toggle, group);
shadow.append(style, wrapper);
document.body.append(container);
toggle.addEventListener("click", () => {
wrapper.classList.toggle("collapsed");
});
return group;
}
const buttonGroup = createButtonContainer();
function createLink(icon, label, cls, url) {
const a = document.createElement("a");
a.className = `access-link ${cls}`;
a.href = url;
a.target = "_blank";
a.rel = "noopener noreferrer";
a.innerHTML = `<img src="${icon}" alt=""><span>${label}</span>`;
buttonGroup.appendChild(a);
}
const scIcon =
"data:image/svg+xml;base64,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";
const unIcon =
"data:image/svg+xml;base64,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";
(async function () {
if (ENABLE_SCIHUB) {
createLink(
scIcon,
"Sci‑Hub",
"scihub-link",
SCIHUB_URL + window.location.href
);
}
const data = await getOpenAccessStatus();
if (data.best_oa_location?.url) {
createLink(unIcon, "Unpaywall", "unpaywall-link", data.best_oa_location.url);
}
})();
})();