Journal Check
Install — free
Open beta · built for researchers

Journal rankings, refreshed every month.

A browser extension that shows SJR, ABDC, ABS, FT50, CORE, CCF and citation impact — right next to every result on Google Scholar, PubMed, arXiv and Semantic Scholar. DOI / ISSN keyed, so a top journal never gets mis-tagged as a predatory one.

Add to Chrome — freeSee how it worksv0.0.1 · MIT licensed · no account needed
scholar.google.com/scholar?q=attention+is+all+you+need

The strategic management of technology and innovationSJR Q1 · ABDC A* · FT50↑ injected by Journal Check

R Burgelman, C Christensen, S Wheelwright - Academy of Management Journal, 2020
This paper revisits the framework for managing technological innovation across organizational boundaries…
Cited by 4,892Related articlesAll 32 versions

Attention is all you needCORE A*

A Vaswani, N Shazeer, N Parmar - Advances in NeurIPS, 2017
We propose a new simple network architecture, the Transformer, based solely on attention mechanisms…
Cited by 142,318Related articlesAll 32 versions

Deep residual learning for image recognitionCORE A*

K He, X Zhang, S Ren, J Sun - Proceedings of the IEEE CVPR, 2016
Deeper neural networks are more difficult to train. We present a residual learning framework to ease…
Cited by 289,114Related articlesAll 32 versions
11,000+
Journals ranked
6
Ranking systems
Monthly
ETL cadence
4
Supported sites
Works on
Google Scholar
scholar.google.com
PubMed
pubmed.ncbi.nlm.nih.gov
arXiv
arxiv.org
Semantic Scholar
semanticscholar.org
Features

Built so you can trust what it shows.

Six choices that, together, mean the badge in your search result actually reflects the journal's current standing.

Always fresh

Re-pulled from each ranking source on its own cadence — monthly for OpenAlex, on release for SCImago, ABDC, CORE. No frozen 2023 data.

DOI / ISSN keyed

Every page result is resolved to a stable identifier before lookup. No fuzzy title matching, no quietly wrong answers.

6 ranking systems

SJR, ABDC, ABS AJG, FT50, CORE, CCF and citation-percentile h-index — strongest signal first, source labeled inline.

Inline on every site

Badges appear in the result row itself. No popup to click, no new tab, no layout shift after the page renders.

One-click error reports

See a mismatch? A small flag opens a pre-filled report. Errors flow straight into the next refresh.

Open source

MIT licensed. Inspect the extension, the Workers backend, the ETL scripts — and the date stamps on every data file.

Screenshots

See it in action.

Same data, rendered to feel native to each host site. Switch tabs to see how the badges appear on Google Scholar, PubMed, arXiv and Semantic Scholar.

scholar.google.com/scholar?q=mrna+vaccine

Safety and efficacy of an mRNA-based vaccine against SARS-CoV-2SJR Q1 · h1228
The New England Journal of Medicine
SJR
13.40 (Q1, 2024)
h-index
1228
Massachusetts Medical Society · Updated 2026-05-04

FP Polack, SJ Thomas, N Kitchin, J Absalon - New England Journal of Medicine, 2020
A phase 3, two-dose, BNT162b2 mRNA vaccine trial in 43,548 participants…
Cited by 22,418Related articlesAll 32 versions

The strategic management of technology and innovationSJR Q1 · ABDC A* · FT50

R Burgelman, C Christensen, S Wheelwright - Academy of Management Journal, 2020
This paper revisits the framework for managing technological innovation across organizational boundaries…
Cited by 4,892Related articlesAll 12 versions

Attention is all you needCORE A*

A Vaswani, N Shazeer, N Parmar - Advances in NeurIPS, 2017
We propose a new simple network architecture, the Transformer…
Cited by 142,318Related articlesAll 86 versions

The extension adds exactly one chip per result, coloured by the strongest signal (Q1 green → Q4 red). Hover it in your browser to see each system's value, year and a one-click report button.

How it works

Three steps, in the time it takes a page to render.

  1. 01

    Identify

    On supported sites, the extension reads each result's DOI or ISSN directly from the DOM. If neither is present, the Workers API resolves title + year to a stable key.

    // extracted from result
doi  = "10.1038/nature14539"
issn = "0028-0836"
  2. 02

    Look up

    A single batched request fetches every ranking we hold for that journal. Cached at the edge — the second pass costs nothing.

    GET api.journal-check.com/v1/rank
  ?doi=10.1016/S0140-6736(20)31604-4
→ { sjr: { quartile: "Q1", value: 13.4 },
    abdc: null, ft50: false,
    hIndex: { value: 1228 } }
  3. 03

    Inject

    A single badge lands right after the result title, coloured by the strongest signal. Hover to expand into a card with each system's value, year and a Report button.

    <span class="fs-badge">
  SJR Q1 · ABDC A* · FT50
</span>
Data sources

Five independent feeds, each on its own clock.

No black box. Every refresh date is published and verifiable through our public API.

SourceCoverageScaleCadenceLast refresh
SCImago SJR9,664 journalsQ1 / Q2 / Q3 / Q4Yearly2026-05-04
ABDC1,032 businessA* / A / B / CYearly2025-12-12
CORE284 CS venuesA* / A / B / COn release2024-09-01
FT5050 businessCurated listStatic2025-03-08
OpenAlex (fallback)13,753 journalsPercentile bandsMonthly2026-05-11
Pricing

Free for everyone. Optional support keeps it alive.

Built by one person. The core extension is free and stays free. Patron tiers cover infrastructure costs; the V2 AI module is a separate, opt-in subscription.

Free
$0
always
  • All MVP signals: SJR, ABDC, ABS, FT50, CORE, CCF, h-index
  • Inline on every supported site
  • Refreshed monthly from source
  • One-click error reporting
Install for free
Suggested
Patron
$5–$30
per year · optional
  • Everything in Free
  • Your name in CREDITS.md (optional)
  • Help cover Workers, D1 and Playwright runners
  • Early access to new ranking systems
Become a patron
Coming
Research v2
$4.99
per month · coming soon
  • AI-summarised methodologies inline
  • Field-normalised quality signals
  • Independent of the free tier — opt-in only
  • Priority support
Join the waitlist
FAQ

Questions, answered plainly.

Why a new extension when others already exist?
The closest community alternative was last updated in mid-2023. Two annual SCImago releases and several ABDC / ABS revisions have shipped since. Journal Check re-pulls each source on a published schedule and shows you when it last did so.
Where does the ranking data actually come from?
SCImago SJR (via headless Playwright), ABDC and CORE (direct CSV / xlsx downloads), FT50 (hand-curated), and OpenAlex (citation impact fallback). All sources are listed in the table above with their last refresh date.
Is my browsing history sent anywhere?
No. The extension extracts DOIs and ISSNs from the page DOM and sends only those identifiers to api.journal-check.com. No URLs, search queries, or page contents leave your browser.
What if a ranking looks wrong?
Click the small flag next to any badge. A pre-filled report opens with the DOI / ISSN and the source we used. Errors are queued for the next monthly refresh.
Will it always be free?
The core extension stays free. A separate V2 AI module ($4.99/month) is in development for users who want field-normalised signals and AI summaries. Patron tiers are optional and help cover server costs.