a permanent place for the internet
Enter the URL or the digest of an existing file
Or check out the following examples of existing URLs: is a universal content addressable index for the internet.

It allows you to find files anywhere by their digest, and to create a permanent URL ("permalink") for any existing file. does not store the content of the files, but only their digest and a list of URLs where they have been seen in the past. Since the original files pointed to by those URLs are not stored by, they may change or disappear at any time.

Even if the original file is deleted or modified, a URL will always display the same exact content (or nothing at all): checks in real time that the digest of the file at one of the original URLs matches the digest in the URL, and if it does not, it will try the next URL in the list, until a match is found or the list is exhausted.

If all the URLs in the list are exhausted, the URL will display an error message, but it will never display a different file than the one it was originally created for.

If at some point in the future the original file matching the digest is seen again at a previous or a new URL, the URL will start displaying it again.