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Access and security

Object ACL

Make one file public or private, and copy its link.

The object ACL decides who can download one particular file. A file is either:

StateWho can download it
Private (default for every upload)Only you, and people you gave access with a key or a presigned URL
PublicAnyone with the link, with no sign-in. The link never expires.

Making one file public does not expose anything else in the bucket. Visitors can see the bucket’s file list only if the bucket ACL is also public.

Make a file public

1

Open the file's menu

Open the bucket. On the file’s row, open the Actions (⋮) menu and select Make public.

The Bucket Details file list with a file's Actions menu open and Make public highlighted
2

Confirm

The Make this file public? dialog explains that anyone with the link can view and download the file. Select Make public.

The Make this file public? dialog with Cancel and Make public buttons

The link uses your bucket’s region and the full file path, including folders:

https://bom01.zata.ai/my-bucket/photos/myfile.txt

(idr01 for a bucket in Indore.) You can also make a file public or private from the file preview in the Preview Manager.

If the dialog says the bucket has a policy that blocks public access, making the file public has no effect until you change that policy on the Policies page.

Make a file private again

1

Open the file's menu

On the file’s row, open the Actions (⋮) menu and select Make private.

The Bucket Details file list with a public file's Actions menu open and Make private highlighted
2

Confirm

The Make this file private? dialog shows the file name. Select Make private.

The Make this file private? dialog with Cancel and Make private buttons

The link stops working at once; anyone who saved it gets an access-denied error. This is the only way to switch off a public link, because it never expires on its own.

Good to know

  • You set this one file at a time. New uploads are always private, even in a public bucket.
  • Making a file private does not delete it or change its versions or Object Lock settings.
  • A public link can be forwarded and saved by anyone. To share for a short time, use a presigned URL instead.
  • Downloads count towards your egress, and public links stop working while your account is suspended.
  • Sub-users cannot make files public.