S3 Explorer gives you fine-grained control over who can view or modify your S3 data. All security settings are located in the inspector panel. Select a bucket to edit policies, ACLs and CORS rules in a consistent layout, or choose an object to adjust its ACL.
The Bucket Policy tab lets you paste JSON policies exactly as you would in the AWS console. Use the Validate button to check syntax errors before saving. Policies control which IAM users, roles or public principals can access your bucket or objects.
The IAM tab lets you grant existing users or roles bundled access or create new IAM users with just a few clicks. Pick from Read, Write or Full Control presets and copy the generated keys into your AWS credentials file.
The Access Control List (ACL) tab offers a simple form for assigning permissions. You can choose a canned ACL like private or public-read, or define custom grantees. Each grantee entry has these labels:
Use Add Grantee to insert a new row, then Save when finished. For advanced users, the Raw JSON option lets you edit the underlying ACL document directly.
The CORS tab manages cross-origin resource sharing rules. Paste your JSON array and click Validate. If the rules are valid, Save will store them to the bucket configuration. CORS is useful when your web applications need to make direct requests to S3.
To keep your data safe, always double check each permission before saving. The typical click path is: Sidebar → select bucket or object → Inspector panel → ACL or CORS. Bucket policies are available only when a bucket is selected. Only users with valid credentials can view or change these settings, and your credentials never leave the browser.
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