Google Scholar is free for public access. That is the plain answer, and it matters because the search tool itself does not sit behind a paywall.
What Google Scholar gives is search access, not full reading access to every item it finds. Its help pages state that abstracts are freely available for most articles, while full text may still need a subscription. That is the key split a reader needs to keep in mind. The search is open. The content behind some results is not.
I care about that distinction because it changes how a researcher uses the site. Google Scholar can point to journal articles, theses, books, preprints, technical reports, and other scholarly material. It also includes court opinions and patents. But the presence of a result does not mean the item itself is free to read. A search engine can be open while the source it points to is closed.
The public part is easy to miss because Scholar is so simple at first glance. It looks like one search box, and that can make it seem as if everything it finds should be immediately available. In practice, Scholar is more like a map than a library shelf. It helps you locate material across publishers, repositories, and the wider web. The item may then lead to a free copy, a library link, or a paywalled page.
Its own help text also says it indexes research articles and abstracts from major academic publishers and repositories worldwide, including both free and subscription sources. That is useful, but it is also a limit. Coverage is broad, yet it is not complete in a way any scholar can assume. Google Scholar itself says to check current coverage of a specific source by searching sample titles in quotes. That is a modest and honest warning. It tells me not to treat the index as a full census of scholarship.
There is another limit worth naming plainly. A free search tool is not the same as a clean record of scholarly literature. Scholar mixes many kinds of material. That breadth helps with discovery, but it also means the results list needs care. A title can appear for many reasons. Some items are final published versions. Some are author manuscripts. Some are only abstracts or records. Some are not easy to judge from the search page alone.
I also pay attention to the public access side of Scholar profiles. Google says public profiles can show articles that are expected to be publicly available under funding agency rules, and that a public profile can display links when a public version exists. That is helpful for tracking open copies, but it is not the same as a promise that all research will be open. It is a display feature tied to profile settings and the availability of a public version somewhere on the web.
The main practical fact, then, is simple. Google Scholar is free for anyone to use, but free search is not free reading. That is the line that keeps the resource in proper scale. It is valuable because it lowers the barrier to discovery. It is limited because access to the item itself still depends on where the item lives and what rights or permissions surround it.
I would not oversell the tool beyond that. Scholar is useful when the user wants a broad, no-cost way to find scholarly material fast. It is less clear when the question is full coverage, exact provenance, or reliable access to every text. In those cases, the limits of the index matter as much as its reach.
That is why the best short answer is also the most careful one: Google Scholar is free for public access, but the materials it points to are not all free. That distinction is the one I would want a reader to keep in view, because it is the difference between open search and open text.
The Source List promises one digital source worth knowing, one search tip, and one honest limitation. Google Scholar fits that shape well. It is worth knowing, the search box is free to use, and the limit is plain: search access is open, while the documents behind many results still are not.