Public Domain Photos and Free Images: Licenses Explained

Updated September 2026 · Written and maintained by the Progression Agency strategy team

Free is not one thing. An image can be genuinely public domain, released under a permissive license, free for personal use only, or simply posted somewhere by somebody who had no right to post it — and the four look identical in a search result. This page sets out what each license actually permits, which sources are reliable, and the record-keeping that means you can answer the question if it is ever asked.

Public domain is not the same as free to use

Public domain means copyright has expired or been waived; royalty-free means a licence was granted, frequently with conditions. Sites mixing the two without labelling which is which are the source of most attribution failures.

What to record when you use one

The source URL, the licence name, the date retrieved and the required attribution string. Reconstructing that afterwards, when a claim arrives, is close to impossible.

Public domain photos and images: what the term actually covers

Public domain means no copyright applies — because it expired, was forfeited, or never existed. It is a much narrower category than free-to-use, and the two are constantly confused.

The practical consequence is that public domain photos and images can be used, modified and sold without permission or attribution, while most ‘free’ stock images cannot. A license that permits commercial use is not the public domain; it is a license, and it can carry conditions that a public-domain work does not.

Copyright expiry

The largest source. Terms vary by country, so a work in the public domain in one jurisdiction may not be in another.

Government works

Many works produced by US federal agencies enter the public domain on creation. This does not extend automatically to state or foreign governments.

Dedicated to the public domain

Creators can waive rights explicitly, commonly via CC0. This is a deliberate act and is not implied by a work being posted publicly.

What public domain does not cover

Trademarks, personality rights and the rights of people depicted. A public-domain photograph of a person may still need a release for commercial use.

How to verify before using

Check the source’s stated status and the country of origin. ‘Found on a free site’ is not a license and will not survive a challenge.

What does public domain actually mean?

Public domain means a work is not protected by copyright, either because the term has expired, because it was never eligible, or because the rights holder deliberately waived them. A public domain image can generally be used, modified and sold without permission or payment.

That is a genuinely strong position and it is narrower than the way the phrase gets used. A great deal of material described online as public domain is not; it is freely licensed, which is a different thing with conditions attached. The distinction matters when somebody asks you to justify a use.

How is public domain different from royalty-free?

They are unrelated. Public domain describes the copyright status of a work. Royalty-free describes a payment model — you pay once rather than per use — and royalty-free images are frequently not free of charge at all.

This confusion causes real problems because royalty-free stock licenses carry conditions: limits on print runs, on resale, on use in templates or products for sale. Treating a royalty-free purchase as though it were public domain is a common way to breach a license you actually paid for.

What is CC0 and how does it differ?

CC0 is a tool a creator uses to waive their rights as far as the law allows, placing the work as close to the public domain as a deliberate act can. In practical terms it behaves like public domain, with the difference that somebody chose it rather than time producing it.

How do images enter the public domain?

Through copyright expiry, through being a work of the US federal government, through deliberate waiver, and through historic US rules about renewal and copyright notice. Expiry produces the largest volume.

US federal government works are a large and neglected source

Works created by US federal government employees as part of their official duties are generally not subject to copyright, which covers an enormous quantity of photography from space agencies, national parks, scientific bodies and military archives. Almost nobody in marketing looks there, which is precisely why the results look unfamiliar.

Copyright terms differ by country and by date

A work in the public domain in one country may still be protected in another, and US rules changed several times during the twentieth century in ways that make older material genuinely complicated. If your audience is international, the safe assumption is the more restrictive position.

Where can you actually get public domain photos?

Government and agency archives, national libraries, museum digitization programs, and dedicated public domain collections. These are also the sources that produce distinctive imagery, because so few marketing teams use them.

The most reliable general starting points are institutional. The Library of Congress free-to-use collections and the Smithsonian Open Access program both publish large sets with clear terms, and both are effectively unused in commercial marketing.

Are the major free stock sites safe to use?

Generally yes for their own licenses, and you still have to check the individual image. Those platforms host contributed work, occasionally receive uploads the contributor had no right to make, and periodically change their terms.

The license attaches to the image, not the site

A site with a permissive general license can still carry individual images under different terms, particularly where a contributor uploaded something they did not own. Checking the specific image page rather than the site’s terms page is the whole of the difference.

Terms change, and your use continues

A platform can revise its license after you have downloaded and published something. A dated screenshot of the terms as they stood when you downloaded is what demonstrates you acted reasonably, and it takes seconds.

What should you never use?

Images taken from search results, social media reposts, aggregator boards, roundup posts offering downloads, and anything with no stated license. The absence of a license is not permission.

Search engine reuse filters report claims, not facts

A ‘labeled for reuse’ filter reflects metadata a site published about an image. If that site was wrong, or was itself republishing without rights, the filter repeats the error. It is a starting point for finding candidates and not evidence of anything.

What rights exist beyond copyright?

Publicity and privacy rights in recognizable people, trademark in logos and brands, separate copyright in artwork appearing within a photograph, and in some cases property releases. A public domain photograph can still be unusable commercially for any of these reasons.

People in frame are the most common issue

Using a recognizable person’s image to promote a product generally requires a model release, and the copyright status of the photograph does not change that. This is the single most common way a technically free image becomes a commercial problem.

Editorial-only is a content restriction

Images marked editorial use only are free to download and cannot be used to sell anything. The restriction usually exists because the frame contains people, brands or property without the releases commercial use requires.

What record should you keep?

The source URL, the date, the license name and a screenshot of the license as displayed, kept for as long as the image remains published. About ninety seconds per image.

The fifth row matters more than it looks. Required attribution is routinely lost during a site redesign, which converts a compliant use into a non-compliant one without anybody deciding to do it.

Does the source matter for how the site looks?

Considerably. The major free stock platforms are used by everybody, so the recognizable images appear on hundreds of sites simultaneously and read as generic. Institutional archives and your own photography do not have that problem.

The chart pairs license risk with distinctiveness and the two do not trade off the way people assume. Your own photography and institutional archives are simultaneously the safest and the most distinctive; image search results are the riskiest and not especially distinctive either.

Should you use free stock images at all?

For structural and background purposes, yes. For anything representing your business, your team or your work, no — because a stock photograph of somebody else’s office says nothing about you and appears on competitors’ sites.

What about AI-generated images?

The license position is genuinely unsettled and varies by tool and jurisdiction. US copyright guidance has held that purely machine-generated material without sufficient human authorship is not registrable, and individual tools impose their own commercial terms. Read the specific tool’s terms rather than assuming.

For commercially significant use this is an area where the safe course is either commissioned photography or licensed stock with an indemnity, precisely because the position is still moving. The United States Copyright Office publishes the current official position.

When is paid stock the right answer?

When the use is commercially significant, when you need an indemnity, or when the specific image genuinely does not exist in free collections. Paid libraries carry legal protection that free sources generally do not, and for a substantial campaign that protection is the product.

When is commissioned photography the right answer?

Whenever the image represents your business, your people, your premises or your work. It is the only source that is simultaneously distinctive, unambiguous on rights, and impossible for a competitor to use.

How do you find good public domain images efficiently?

Search institutional collections directly rather than through general image search, use their own subject and collection browsing, and search for the era or the agency rather than the keyword you would use commercially.

What about images on Wikimedia Commons?

License is stated per file and varies substantially: some files are public domain, many require attribution, and some carry share-alike conditions that affect how you may use derivative work. Read the specific file page every time.

Do you need to credit public domain images?

Not legally, in most cases, and it is good practice anyway. Crediting an institutional source costs nothing, is frequently appreciated, and creates a record of where the image came from that helps you later.

What happens if you get it wrong?

Most commonly a takedown request or an invoice from a rights holder or their agent. It is resolvable and it is expensive in time and attention, and the record described above is precisely what makes the resolution quick rather than protracted.

Does this apply to social media as well as websites?

Yes, and it is enforced there too. Platform terms do not grant you rights to third-party images, and reposting something found on a platform is not a license to use it in your own marketing.

What about images in client work?

Establish who is responsible in the contract. Agencies frequently supply images and clients frequently assume the agency cleared them; writing down who sourced, licensed and recorded each image prevents a difficult conversation later.

What is the simplest safe workflow?

Use your own photography where the image represents you, institutional archives where you need something distinctive, licensed stock where the use is commercially significant, and record every one of them.

Common mistakes

Seven, and the first three account for almost every image problem we see before a launch.

For the build side, our web design page covers how imagery is specified in a project, and the beauty store guide covers a category where original photography is worth more than almost any other asset.

How do you search institutional archives effectively?

Answer first: search by subject, era or agency rather than by the commercial keyword you would use on a stock site. Archives are cataloged by what the thing is, not by the marketing concept you want it to illustrate, and searching them like a stock library returns almost nothing.

What should a team policy on images say?

Answer first: which sources are approved, who is allowed to add an image, what record must be kept, and who checks before launch. Four lines, written once, prevents nearly every image problem a marketing team encounters.

Free stock photos, royalty free images and public domain: a plain comparison

Answer first: free stock photos are licensed by a platform under conditions; royalty free images are paid once rather than per use and are frequently not free at all; public domain images carry no copyright. Three different things that get used interchangeably.

The two rows people conflate most are row one and row four. Public domain is about copyright having lapsed or been waived; royalty free is about how you pay. A royalty free image can be expensive, and it still carries conditions you agreed to when you bought it.

Which free image source should you use for which job?

Answer first: institutional archives for anything that should look distinctive, major free stock platforms for backgrounds and structural imagery, licensed stock where the use is commercially significant, and your own camera for anything representing your business.

The last row is the trap worth repeating. An editorial-only image is perfectly usable illustrating an article and cannot appear in an advertisement, and the same file sitting in your media library makes that distinction very easy to lose.

Frequently asked questions