How to Read a Free Image License

"Free" on an asset site is a marketing word, not a legal one. Whether you may use an image, and how, is determined by the licence — and the check itself is quick, it is just rarely done.

Why "Free" on Its Own Is Not Enough

Asset sites use "free" to describe the download: no payment, no registration, one click. It tells you nothing about whether the image may go into commercial content, whether it may be modified, or whether attribution is required. Those three live in the licence terms, not next to the download button.

The risk is asymmetric. Thirty seconds to read the terms costs one click; being chased afterwards costs a takedown, an apology and a rewrite of the content. Pre-checking is cheap relative to the payoff.

The four licence types below cover the large majority of cases on asset sites. Judging whether an image is usable is, at bottom, a question of which type it belongs to and whether what you intend to do touches that type’s limits.

What the Four Common Licence Types Actually Mean

CC0 / public domain

The author waives copyright claims. Anyone may use, modify and distribute freely, with no attribution required. The most permissive type and the safest option for commercial content.

CC BY (attribution)

Any use and any modification, including commercial, is allowed provided you attribute. Attribution has concrete requirements: the author name, the work title and the licence type. Placement does not need to be prominent, but omission does. The trap here is "I forgot to attribute", not "I could not use it at all".

CC BY-NC (non-commercial)

Use is allowed but commercial use is not. This is the most commonly misused type. Whether something counts as commercial is decided by the use case, not by the nature of the content: a company account, product promotion and advertising imagery are all commercial; a personal blog tutorial usually is not. If your account has an operational purpose, this type is effectively off the table.

Other terms with restrictions

Some sites use their own licences. Common restrictions: not for promoting competitors, not for adult or violent content, not for redistribution as a paid asset pack. These are usually on the download page or in the terms page, never in the file name.

Licence type	Commercial use	May modify	Attribution	Fit for commercial content
CC0	Allowed	Allowed	Not required	Safest
CC BY	Allowed	Allowed	Required	Usable, mind the attribution
CC BY-NC	Not allowed	Allowed	Required	Avoid
Site-specific	Per terms	Per terms	Per terms	Read the terms first

What Attribution Should Contain

Attribution is not a vague "thanks to some asset site". It needs three things at minimum: the author name, the work title and the licence identifier. All three are usually available on the download page next to the licence information.

Place it near the image in a visible position, or list it all together at the end of the piece.
Keep a link back to the original work so others can verify the licence.
"Does not need to be prominent" is not the same as "may be omitted" — if it is required, it is required.

A practical habit is to record the licence details while you are creating, not before publishing. Reconstructing the original source later is hard, especially for images that came from a third-party aggregator.

Does Editing a File Count as a Breach?

Most licences permit modification, with exceptions. Two restrictions deserve attention: no-modification clauses (occasional on art sites, requiring the work to be used as-is) and no-derivative-distribution clauses (which forbid re-uploading an edited file as an asset).

In practice, adding a border, cropping or changing the background colour are routine uses that essentially every licence permits. What genuinely needs care is redistributing a modified image as a reusable asset — that is a different act altogether.

A Four-Step Check

For any specific image, the following four steps give a conclusion in about thirty seconds.

1Look for licence information on the download or detail page. If there is none, assume it may not be used.
2Identify the type: CC0, CC BY, CC BY-NC, or site-specific.
3Match it against what you intend to do: commercial or non-commercial, modified or not, redistributed or not.
4Where attribution is required, record the author and link and include them when publishing.

Free Images, Icons & Fonts Directory marks the licence type and attribution requirement for all 49 sites, so you can filter by this check directly rather than opening download pages one by one.

Frequently Asked Questions

May I use non-commercial assets in personal content?

It depends on the content. Pure personal sharing with no operational purpose is usually not commercial; content with a clear operational purpose — a company account, product promotion, links to ads or traffic — counts as commercial even if an individual wrote it. The use case decides, not the author.

I found a problem with the licence after publishing — what now?

Replace it immediately. Correcting and apologising in already-published content is far easier to handle than being reported. Keep a screenshot of the original download page as evidence.

Can I find the licence from the file name?

No. File names and thumbnails carry no legal meaning; the licence lives only on the download page or in the site terms. Judging by file name is a common mistake.

Is the same image licensed the same way on different sites?

Not necessarily. The same author may publish the same image under different terms on different platforms. Judge each specific download page rather than relying on an impression of a site.

Summary

Four steps: find the licence, identify the type, match it to your use case, and attribute where required. Thirty seconds, after which the image is safe to use.

For the resource list with licence notes, see Free Images, Icons & Fonts Directory; for compression, see PNG, JPG or WebP: Which Format and How Much Compression.