: Your browser downloads the encrypted data first, then uses the key from the URL to decrypt it locally.
Before assuming you have "no key," check the context of the link. Look for a 43-character alphanumeric string near the link. How To Open A Mega Link Without Decryption Key
Many Mega links contain the key embedded. A full link looks like: https://mega.nz/file/FileID#DecryptionKey If you have that entire string, you already have the key. Just paste the full link into your browser or Mega app. : Your browser downloads the encrypted data first,
The core of Mega’s service is end-to-end encryption (E2EE). When a user uploads a file, it is encrypted on their local device using an AES-128 key before it ever reaches Mega’s servers. The "key" is typically appended to the URL after a hash symbol ( How To Open A Mega Link Without Decryption Key