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Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| ZoteroBibzbib.org | archive.todayarchive.ph | arXivarxiv.org | Google Scholarscholar.google.com | |
|---|---|---|---|---|
| What it does | Turns a URL, DOI or ISBN into a formatted citation in any of 10,000 styles | Freezes one page on demand into a snapshot that keeps working when it moves | Free preprints in physics, maths, computer science and quantitative biology | Searches academic papers and shows who has cited each one since |
| What it costs you | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. |
| Your files | Runs on their server | Runs on their server | Runs on their server | Runs on their server |
| Where it stops | There is no account or library — clear your browser storage and the bibliography goes with it, so export before you close. | It archives one page at a time with no crawl, the operator is anonymous, and some DNS resolvers have historically had trouble reaching its domains. | Preprints are moderated but not peer reviewed — treat a result here as a claim, not a finding. | No usable filters beyond date and no bulk export, and a large share of results still land on a publisher paywall. |
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| Category | Reading & Research | Reading & Research | Reading & Research | Reading & Research |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
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