Case law databases are the digital archives where court opinions live, and the practical choice for any given search comes down to three tiers: free platforms like Google Scholar, CourtListener, and the Caselaw Access Project; the federal judiciary’s own PACER system for filings and dockets; and paid services like Westlaw, LexisNexis, and Bloomberg Law that add editorial summaries and citation-checking. Which one you reach for depends on whether you need the raw text of a decision, the full docket of a federal case, or research-grade tools to confirm a ruling is still good law.
Free Databases and What They Cover
Google Scholar carries U.S. Supreme Court opinions, federal appellate and district court decisions, and state appellate and supreme court opinions going back decades.1Library of Congress. Google Scholar – How To Find Free Case Law Online FindLaw hosts a searchable collection of state and federal opinions alongside case summaries.2FindLaw. Case Law Resources Both work well when you already have a case name or a general topic.
CourtListener, run by the nonprofit Free Law Project, claims one of the largest collections available online, with roughly nine million decisions from federal, state, tribal, territorial, and military courts.3CourtListener. Case Law Coverage Harvard Law School Library’s Caselaw Access Project has digitized over 6.5 million decisions from printed reporters, opening up the full historical record of American case law.4Harvard Library Innovation Lab. Caselaw Access Project GovInfo, from the Government Publishing Office, provides federal court opinions plus legislative history and other government documents.5GovInfo. Discover U.S. Government Information
The trade-off is that free databases give you the raw text of opinions and little else. No editor-written summaries, no topical indexing, and usually no way to check whether the case has been overturned. For casual reading or a quick look at a landmark ruling, that’s enough. For building an argument you plan to file, it isn’t.
PACER for Federal Filings
PACER (Public Access to Court Electronic Records) is the federal judiciary’s system for case filings, docket sheets, and court orders from every federal district, bankruptcy, and appellate court. It charges $0.10 per page with a $3.00 cap per document. If your quarterly charges come to $30 or less, PACER waives them entirely for that period, which makes it effectively free for occasional users.6PACER. Pricing Frequently Asked Questions
Use PACER when you need the actual documents filed in a federal case, not just the court’s final opinion. Motions, briefs, orders, and the docket showing every event in a case all live here.
Paid Services and What You Pay For
Westlaw, LexisNexis, and Bloomberg Law sit in a different tier. Their editors summarize each case, tag it with topical classifications called headnotes, and run proprietary systems that track how later courts have treated the decision. A colored flag next to a case tells you at a glance whether the ruling is still reliable, and a headnote link takes you to every other case addressing the same point of law.
LexisNexis publishes tiered plans for law firms starting at $114 per month for state case law only and rising to $324 per month or more for 50-state coverage with additional analytics and news tools.7LexisNexis. LexisNexis Pricing Plans for Law Firms Westlaw does not publish standard pricing publicly, and large-firm subscriptions can run into the thousands each month. That puts these platforms out of reach for most individuals paying out of pocket.
Free Access to Paid Platforms
Most counties have a law library, often inside or next to the courthouse, and many give free in-person access to Westlaw and LexisNexis. Some also offer limited remote access or short-term trial accounts. University law libraries sometimes extend borrowing or computer privileges to the public, though policies vary.
If you’re representing yourself or just need to run a handful of searches, a trip to the county law library is usually the most practical route. The librarians there help non-lawyers regularly and can steer you toward the right search terms and the right court.
What You Need to Find a Case
The fastest way to pull up a specific decision is with its legal citation. A citation like 410 U.S. 113 identifies the volume (410), the reporter series (U.S., for United States Reports), and the starting page (113).8Library of Congress. Roe v. Wade Typed into any database, it drops you straight onto the case.
Without a citation, you can search by party names, the deciding court, or the docket number. A docket number is the unique tracking code assigned when a lawsuit is filed and follows the case through every motion and appeal. Knowing whether the case sat in state or federal court narrows things quickly. If all you have is a general legal topic, a broader keyword search works, but you’ll sift through more results.
How To Search Efficiently
Terms and Connectors
Most legal databases support Boolean searching. You link keywords with AND, OR, and NOT to control what comes back. Searching “negligence AND medical” pulls only cases containing both words; adding “NOT malpractice” strips out that subset.
Proximity operators do more. On Westlaw, /s finds two terms in the same sentence and /p finds them in the same paragraph. LexisNexis uses similar operators, defining /s as roughly within 25 words and /p as within 75. Terms sitting close together are usually part of the same legal discussion, which cuts down false hits when common words like “duty” or “breach” would otherwise return thousands of unrelated opinions.
Natural Language and AI
Boolean isn’t required. Every major platform now accepts plain-English questions (“Can a landlord withhold a security deposit for normal wear and tear?”) and interprets your intent. That’s a good way in when you don’t know the vocabulary of an area yet.
AI tools have pushed further, using large language models to summarize opinions, extract holdings, and suggest related cases. Some systems predict how a particular judge or circuit tends to rule. The catch is real: AI-generated content can include fabricated case names, distorted holdings, and citations to opinions that don’t exist. Language models produce text that sounds right, not text that is right, and the errors can be convincingly detailed. Courts have already sanctioned attorneys for filing briefs with AI-invented citations. Treat any AI summary or cite as a lead and verify every name, holding, and quote against the actual opinion.9National Center for State Courts. A Legal Practitioners Guide to AI and Hallucinations
What You’ll See When You Open a Case
Case entries follow a fairly standard layout. The caption at the top lists the parties, the court, and the date. On paid platforms, a syllabus or editorial summary follows with a snapshot of the facts, the legal question, and the ruling. Below that, Westlaw and LexisNexis add headnotes: short editor-written paragraphs breaking down each distinct legal point in the opinion. Headnotes aren’t part of the opinion itself, but they help you jump to the section of a long ruling that discusses your issue.
The body of the document is the opinion. The majority opinion holds the court’s binding reasoning. Concurring opinions agree with the outcome for different reasons; dissenting opinions disagree. Attorneys and judges are listed near the top, and footnotes cite other decisions or clarify technical points.
Published vs. Unpublished Opinions
Courts label some opinions “published” and others “unpublished” or “non-precedential.” Published opinions appear in official reporters and are binding precedent in their jurisdiction. Unpublished opinions are still available through databases, and LexisNexis lets you filter results by publication status.10LexisNexis. Publication Status Filter in Cases
Whether you can cite an unpublished opinion depends on where you’re filing. In federal courts, Rule 32.1 of the Federal Rules of Appellate Procedure bars courts from prohibiting citation of unpublished opinions issued on or after January 1, 2007.11Legal Information Institute. Rule 32.1 Citing Judicial Dispositions State courts vary widely. Some allow it freely, others restrict it, and a few prohibit it. Check the local rules of the court where you plan to file before relying on an unpublished decision.
Checking Whether a Case Is Still Good Law
Finding a helpful case is only half the work. You also have to confirm no later court has overturned, narrowed, or criticized it. This is where paid databases earn their fees. Westlaw’s KeyCite and LexisNexis’s Shepard’s Citations track every subsequent mention of a case and reduce the result to colored signals.
A red flag on Westlaw means at least one point of the case is no longer good law, usually because it was reversed on appeal or overruled by a later decision.12Thomson Reuters. Westlaw Flags – Checking Cases with KeyCite On LexisNexis, a red stop sign means the same, indicating strong negative treatment like being overruled or reversed.13LexisNexis. Shepards Signals and Analysis A yellow signal on either platform is milder but still a warning: the case has been distinguished, criticized, or limited by another court, so the reasoning may not apply as broadly as the opinion suggests.14LexisNexis. Shepards Signal Indicators and Analysis Phrases
Skipping this step has real consequences. Federal Rule of Civil Procedure 11 requires that every legal argument be warranted by existing law, and courts can sanction attorneys who fall short.15Legal Information Institute. Rule 11 – Signing Pleadings, Motions, and Other Papers Even if you’re filing pro se, citing an overturned case damages your credibility with the judge at the moment you can least afford it.
Mandatory vs. Persuasive Authority
Not every case you pull carries the same weight. Whether a court must follow a prior decision or can simply consider it depends on the relationship between the two courts.
Mandatory authority comes from courts directly above the one hearing your case in the same judicial hierarchy. A state trial court is bound by its own state’s appellate and supreme courts. A federal district court in the Ninth Circuit must follow Ninth Circuit rulings. Every court in the country is bound by U.S. Supreme Court decisions. When you cite mandatory authority, the judge has no discretion to ignore it.
Persuasive authority is everything else: decisions from other states, other federal circuits, or lower courts. A well-reasoned opinion from another jurisdiction can influence a judge, especially where no binding precedent exists. It carries more weight when the other jurisdiction’s statute closely mirrors yours or when several courts have reached the same conclusion. But the judge is free to disregard it. Before building an argument around any case you find in a database, check which court decided it and whether that court sits above yours in the chain of authority.