Legal Glossary
Fair Use: Meaning, Four Factors and Examples
Fair use may permit certain unlicensed uses of copyrighted material, but it is decided case by case under four statutory factors. Credit, nonprofit purpose, a disclaimer, or using a small percentage does not automatically make a use fair.
Written by The Law Basics Editorial Team
Reviewed under our Editorial Policy · Last updated: June 1, 2026 ·
10 min read
Quick definition
Fair use is a U.S. copyright doctrine that may permit use of copyrighted material without permission after weighing the purpose and character, nature of the work, amount used, and effect on the market.
Fair use is a copyright doctrine that may permit limited use of copyrighted material without the owner’s permission. It is evaluated case by case under four statutory factors. No fixed percentage, word count, time limit, or attribution formula automatically makes a use fair.
Fair use is often raised for criticism, comment, news reporting, teaching, scholarship, research, parody, and transformative uses, but those purposes do not guarantee the result.
What Does Fair Use Mean?
Section 107 of the U.S. Copyright Act identifies fair use as a limitation on a copyright owner’s exclusive rights. Courts weigh four nonexclusive factors together in light of the specific facts and the purposes of copyright.
Plain-English meaning: Fair use can make some unauthorized copying lawful, but only after a fact-specific legal analysis.
The Four Fair Use Factors
| Factor | What courts consider | Examples of relevant questions |
|---|---|---|
| Purpose and character | Commercial or nonprofit purpose; transformative character; good faith context | Does the use add new meaning, message, analysis, or function? |
| Nature of the work | Creative versus factual; published versus unpublished | Is the source highly expressive or mainly informational? |
| Amount and substantiality | Quantity and qualitative importance of what was used | Was only what was reasonably needed taken, or was the “heart” copied? |
| Market effect | Harm to the actual or potential market and licensing market | Does the new use substitute for the original or reasonable licensing demand? |
What Is a Transformative Use?
A use may be transformative when it adds a new purpose, meaning, message, expression, or function rather than merely repackaging the original. Transformation can favor fair use, but it is not a standalone test and does not excuse taking more than necessary.
Criticism or review
Quoting or displaying material to analyze its quality, ideas, style, or effect.
Parody
Using recognizable elements to comment on or ridicule the original work.
Search and indexing
Using material in a new functional context, depending on design and market effects.
Teaching and scholarship
Using appropriate portions for explanation or study, subject to all four factors.
Common Fair Use Myths
These statements are not automatic rules:
How Much Can You Use?
There is no universal safe amount. A small but central portion can weigh against fair use, while a larger amount may be justified when reasonably necessary for a transformative purpose. Courts consider both quantity and qualitative importance.
Use only what supports the new purpose. Copying an entire image, song, article, video, or book chapter requires a stronger justification than using a limited excerpt, but even a small excerpt can be infringing.
Fair Use vs Permission, License and Public Domain
| Option | What it means | Main advantage |
|---|---|---|
| Permission or license | The owner authorizes defined use under stated terms | Greater certainty when scope is clear |
| Public domain | Copyright protection has expired, never applied, or was validly dedicated | Copyright permission generally is not needed, though other rights may matter |
| Open license | The owner grants standardized permission, such as certain Creative Commons terms | Clear reuse conditions if followed |
| Fair use | The law may permit use without permission | Flexible but uncertain and fact-specific |
Online Platforms, Takedowns and Claims
A platform’s copyright rules are not the same as a court’s fair-use decision. Automated systems can flag content, owners can send takedown notices, and users may have counter-notice or appeal procedures. Submitting a counter-notice can have legal consequences and may disclose identifying information.
Platform permission, monetization rules, or lack of a claim does not establish fair use. Likewise, a claim does not always establish infringement.
A Practical Risk Checklist
Situations That Require Careful Analysis
Reaction videos
Amount used, commentary, pauses, transformation, and market substitution all matter.
Educational handouts
Nonprofit teaching helps but does not automatically justify copying entire works.
News reporting
Using material to report or verify events may qualify, but decorative reuse may not.
Memes and social posts
Humor or alteration may be transformative, but commercial use and copying the core work can increase risk.
When to Get Copyright Advice
Advice is valuable before publishing a book, course, documentary, advertisement, product, software dataset, commercial website, high-revenue channel, or content built substantially from another person’s work. A lawyer can assess fair use, ownership, licenses, releases, trademarks, privacy, and platform risks.
Key takeaway: Fair use is a flexible four-factor doctrine, not a shortcut or fixed percentage. The safest route may be permission, licensed material, public-domain material, or original content.
Sources Used for This Definition
This glossary page uses official court, government, bar-association, copyright, and legal-education sources. Legal meanings and procedures can vary by jurisdiction, claim, court, document, and individual facts.
Learn how we research and review legal topics in our editorial process.
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Legal Disclaimer
This glossary page provides general legal information for educational purposes only. It is not legal advice and does not create an attorney–client relationship.
Definitions, elements, deadlines, privileges, defenses, procedures, eligibility rules, and remedies vary by jurisdiction and facts. Speak with a licensed attorney or qualified legal-aid organization about a specific legal problem.