Apple has fully restored its developer website, several weeks after taking the site offline due to a “security intrusion”.

The developer.apple.com website was taken down on 18 July, with Apple later confirming that an intruder “had attempted to secure personal information of our registered developers”.

London-based hacker Ibrahim Balic claimed to have exploited vulnerabilities on the website to prove it contained flaws. Balic said he had informed Apple that he had found 13 security vulnerabilities on the developer website, triggering the action by the company.

Balic claimed the security holes allowed him to access the account data of more than 100,000 developers.

The outage left developers without the ability to add prerelease software to devices to test apps, and denied access to resources for creating software and documentation on the forthcoming iOS 7.

Services on the website started to be restored last week, but it is now fully operational with the final services to be restored including tools allowing developers to sign-up and renew subscriptions to the annual paid developer programmes.

In an email to iOS app makers, Apple promised a month’s free access developers to apologise for the outage.