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If you have only the file ID (the part before the #), you cannot decrypt the file. However, users often phrase the question incorrectly. They think they don't have a key, but they actually do, just not in the URL.
The easiest way to obtain the decryption key is to contact the sender directly. They may have forgotten to share the key with you or may have it written down somewhere. Reach out to them and ask for the decryption key.
If you don't have the key, your only real options are:
If you try to open https://mega.nz/file/FileID (no key), you'll get:
MEGA's encryption is designed so that the decryption key is mathematically required to decrypt the file. This is not a optional feature—it's core to how MEGA works.
Websites or tools claiming to "crack" MEGA keys are:
If a user wants to share a file publicly without requiring a key, they can use MEGA's "Link with no key" feature (also called a Public Link). This is a deliberate user choice.
When an uploader creates a public link, they toggle a setting that says "Remove decryption key from link." In that case, MEGA generates a link like:
https://mega.nz/file/RfZAkQyT
When you click that, MEGA lets you download the file directly without any key prompt. Why? Because the uploader specifically instructed MEGA to store the key temporarily or to serve the decrypted file via a short-lived token.
The Catch: If you have a link that asks for a key, the uploader did not make it public. You cannot turn a private link into a public one.
MEGA folders work slightly differently. A folder link looks like this:
https://mega.nz/folder/abc123#XYZ789
If you open a folder link, the browser decrypts the folder listing. Inside that folder, there might be files that do not show a key in the browser address bar.
If you have access to the folder (because you have the folder key, XYZ789), then you can open any file inside without ever seeing the individual file key. To the user, it looks like they opened a file without a key.
The Workaround: If you lost the folder decryption key, you cannot get in. But if you are already in the folder (the key is cached in your browser), you can download freely. Clearing your browser cache will lock you out again.
Our activities have been acknowledged with the prestigious Gandhi Peace Prize 2017 handed over by the President of India Shri Ram Nath Kovind along with the Prime Minister of India Shri Narendra Modi as on Oct, 2025
If you have only the file ID (the part before the #), you cannot decrypt the file. However, users often phrase the question incorrectly. They think they don't have a key, but they actually do, just not in the URL.
The easiest way to obtain the decryption key is to contact the sender directly. They may have forgotten to share the key with you or may have it written down somewhere. Reach out to them and ask for the decryption key.
If you don't have the key, your only real options are:
If you try to open https://mega.nz/file/FileID (no key), you'll get: How To Open A Mega Link Without Decryption Key
MEGA's encryption is designed so that the decryption key is mathematically required to decrypt the file. This is not a optional feature—it's core to how MEGA works.
Websites or tools claiming to "crack" MEGA keys are:
If a user wants to share a file publicly without requiring a key, they can use MEGA's "Link with no key" feature (also called a Public Link). This is a deliberate user choice. If you have only the file ID (the
When an uploader creates a public link, they toggle a setting that says "Remove decryption key from link." In that case, MEGA generates a link like:
https://mega.nz/file/RfZAkQyT
When you click that, MEGA lets you download the file directly without any key prompt. Why? Because the uploader specifically instructed MEGA to store the key temporarily or to serve the decrypted file via a short-lived token.
The Catch: If you have a link that asks for a key, the uploader did not make it public. You cannot turn a private link into a public one. The easiest way to obtain the decryption key
MEGA folders work slightly differently. A folder link looks like this:
https://mega.nz/folder/abc123#XYZ789
If you open a folder link, the browser decrypts the folder listing. Inside that folder, there might be files that do not show a key in the browser address bar.
If you have access to the folder (because you have the folder key, XYZ789), then you can open any file inside without ever seeing the individual file key. To the user, it looks like they opened a file without a key.
The Workaround: If you lost the folder decryption key, you cannot get in. But if you are already in the folder (the key is cached in your browser), you can download freely. Clearing your browser cache will lock you out again.
