Meta is proposing to offer European users a subscription-based version of Instagram and Facebook if they would rather not be tracked for ads, a source said on Tuesday.

The idea, first reported by the Wall Street Journal, comes as the social media giant seeks to comply with a growing list of EU regulations designed to curb the power of US big tech.

The company founded by Mark Zuckerberg makes its billions of dollars in profit by offering advertisers highly individualized data on users, but new European regulations and EU court decisions have made that harder.

The proposal has been put to EU regulators and is another example of big tech companies having to adapt long-held practices to meet oncoming EU rules.

The source close to the matter said subscribers in Europe could pay 10 euros ($10.50) a month for a desktop version of Instagram or Facebook, or 13 euros a month for Instagram on their phones.

Social media platforms have increasingly floated the idea of charging users for access to their sites, whether to comply with data privacy regulations or better guarantee the identity of users.

But the practice would be a major shift for the social media industry that grew exponentially over the past decade on an advertising model that made the site free for users in return for being tracked and ads seen highly personalized.

The proposal could help meet several regulations including the Digital Markets Act that imposes a list of do's and don'ts on big tech companies in Europe, including a ban on tracking users when they surf other sites if their consent hasn't been clearly granted.

It also follows the recommendation of the EU's highest court, which in a July decision said that Meta platform users who declined to be tracked should be offered an ad free alternative "for an appropriate fee."

That ruling echoed many previous rulings against Meta and other big tech firms in which the court ruled that the US company must ask for permission to collect large amounts of personal data, striking down various workarounds that Meta had offered.

Meta declined to comment directly on the Wall Street Journal report, but said in a statement that it still "believes in the value of free services which are supported by personalized ads."

"However, we continue to explore options to ensure we comply with evolving regulatory requirements."

Meta reported second-quarter revenues of $32 billion, of which $31.5 billion came from advertising. Some $7.2bn of that came from Europe.