Here are a few ways to rewrite “Access Denied,” depending on the context and desired nuance:

Formal/Technical:

• Authorization Failed
• Insufficient Permissions
• Restricted Access
• You are not authorized to access this resource.
• Permission Required
• Authentication Required

Less Formal/More User-Friendly:

• Sorry, you don’t have permission.
• You can’t access this page.
• This area is restricted.
• You need permission to view this.
• This content is not available to you.
• Unable to access.

Emphasis on Security:

• Security Alert
• Unauthorized Access Attempt
• Access Forbidden

More Descriptive (depending on why access is denied):

• Account Inactive
• Subscription Required
• Login Required
• Membership Required
• Incorrect Credentials
• Restricted by Administrator

When choosing the best alternative, consider:

• The target audience: Who will see this message?
• The specific reason for the denial: Is it a general lack of permission, or is there a more specific reason?
• The desired tone: Should it be formal, friendly, or serious?
• The context: Where will this message appear (e.g., a website, an application)?