Connect with CS Browser (formerly S3 Browser)

CS Browser, called S3 Browser until mid-2026, is a Windows application for S3-compatible storage. Once it is connected to your bucket, you can upload, download, copy, and move files from a window, with no command line. It comes in a free edition and a paid Pro edition; the free one is enough for everything on this page.

Before you begin

You need:

• A bucket. See Create a bucket.
• An access key attached to that bucket with a role, and its secret key. The role decides what CS Browser can do: Bucket Reader reads and downloads, Bucket Writer also uploads, and Bucket Admin also manages the bucket. See Generate an access key.
• A Windows computer where you can install software, such as your own PC or a Windows node you have signed in to as an administrator; see Connect to a Windows node. CS Browser runs on Windows 10 and 11, and on Windows Server 2016 and later, as well as some older releases.

Install CS Browser

Download CS Browser from s3browser.com/download.aspx and run the installer, following its setup steps to the end.

Add your access key as an account

CS Browser keeps each set of keys as an account. The first time it starts, it opens the Add New Account dialog for you. Later, open it from Accounts > Add new account.

1. In Display name, enter any name that helps you recognize this connection, such as the bucket’s name.
2. In Account type, choose Amazon S3 Compatible Storage. This is the type for any storage that speaks the S3 API but is not Amazon’s own, E2E Object Storage included.
3. In API Endpoint, enter the endpoint for your bucket’s region: objectstore.e2enetworks.net for Delhi, or in-south1-objectstore.e2enetworks.net for Chennai. A bucket stays in the region you created it in, so use that region’s endpoint.
4. In Access Key ID, paste your access key, and in Secret Access Key, paste its secret key.
5. Turn on Use secure transfer (SSL/TLS), so your files and keys travel encrypted.
6. (Optional) Turn on Encrypt Access Keys with a password to protect the saved keys with a password of your own. CS Browser then asks for it each time it opens this account.
7. Click Add new account.

Older versions, from before the rename, call the name field Account Name and the endpoint field REST Endpoint; they take the same values.

Add your bucket as an external bucket

Many S3 tools start by listing every bucket in the account. An Object Storage access key works on the buckets it has a role on, and the full list of your buckets lives in MyAccount, so you tell CS Browser which bucket to open. It keeps the bucket with the account, ready for next time.

1. If CS Browser offers to add an external bucket, click Yes. Otherwise, choose Buckets > Add External Bucket, or press Ctrl+E.
2. Enter your bucket’s name exactly as it appears in MyAccount. To open only one folder inside it, add the folder after a slash, such as <bucket-name>/reports.
3. Click Add External Bucket.

Check that it works

Your bucket appears in CS Browser’s list of buckets. Click it, and its objects appear: an empty list for a new bucket, or your files and folders if it already has some.

To test the connection end to end, upload a small file into the bucket. It appears in the list once the upload finishes, and in the bucket’s Objects tab in MyAccount too. If the upload is refused, check the key’s role on the bucket’s Permissions tab. A key attached as Bucket Reader downloads only; attach it as Bucket Writer to upload.

You can now move files between Windows and your bucket from CS Browser. To connect from a script or a server instead, see Connect with s3cmd. If something does not connect, see Troubleshooting E2E Object Storage.