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User Guide

First time using the AWS CLI? See the User Guide for help getting started.

[ aws . s3api ]



This operation lists in-progress multipart uploads.

See also: AWS API Documentation

list-multipart-uploads is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument. When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: Uploads, CommonPrefixes


--bucket <value>
[--delimiter <value>]
[--encoding-type <value>]
[--prefix <value>]
[--cli-input-json <value>]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]


--bucket (string)

--delimiter (string) Character you use to group keys.

--encoding-type (string) Requests Amazon S3 to encode the object keys in the response and specifies the encoding method to use. An object key may contain any Unicode character; however, XML 1.0 parser cannot parse some characters, such as characters with an ASCII value from 0 to 10. For characters that are not supported in XML 1.0, you can add this parameter to request that Amazon S3 encode the keys in the response.

Possible values:

  • url

--prefix (string) Lists in-progress uploads only for those keys that begin with the specified prefix.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command's output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command's output. If the total number of items available is more than the value specified, a NextToken is provided in the command's output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.


The following command lists all of the active multipart uploads for a bucket named my-bucket:

aws s3api list-multipart-uploads --bucket my-bucket


    "Uploads": [
            "Initiator": {
                "DisplayName": "username",
                "ID": "arn:aws:iam::0123456789012:user/username"
            "Initiated": "2015-06-02T18:01:30.000Z",
            "UploadId": "dfRtDYU0WWCCcH43C3WFbkRONycyCpTJJvxu2i5GYkZljF.Yxwh6XG7WfS2vC4to6HiV6Yjlx.cph0gtNBtJ8P3URCSbB7rjxI5iEwVDmgaXZOGgkk5nVTW16HOQ5l0R",
            "StorageClass": "STANDARD",
            "Key": "multipart/01",
            "Owner": {
                "DisplayName": "aws-account-name",
                "ID": "100719349fc3b6dcd7c820a124bf7aecd408092c3d7b51b38494939801fc248b"
    "CommonPrefixes": []

In progress multipart uploads incur storage costs in Amazon S3. Complete or abort an active multipart upload to remove its parts from your account.


Bucket -> (string)

Name of the bucket to which the multipart upload was initiated.

KeyMarker -> (string)

The key at or after which the listing began.

UploadIdMarker -> (string)

Upload ID after which listing began.

NextKeyMarker -> (string)

When a list is truncated, this element specifies the value that should be used for the key-marker request parameter in a subsequent request.

Prefix -> (string)

When a prefix is provided in the request, this field contains the specified prefix. The result contains only keys starting with the specified prefix.

Delimiter -> (string)

NextUploadIdMarker -> (string)

When a list is truncated, this element specifies the value that should be used for the upload-id-marker request parameter in a subsequent request.

MaxUploads -> (integer)

Maximum number of multipart uploads that could have been included in the response.

IsTruncated -> (boolean)

Indicates whether the returned list of multipart uploads is truncated. A value of true indicates that the list was truncated. The list can be truncated if the number of multipart uploads exceeds the limit allowed or specified by max uploads.

Uploads -> (list)


UploadId -> (string)

Upload ID that identifies the multipart upload.

Key -> (string)

Key of the object for which the multipart upload was initiated.

Initiated -> (timestamp)

Date and time at which the multipart upload was initiated.

StorageClass -> (string)

The class of storage used to store the object.

Owner -> (structure)

DisplayName -> (string)

ID -> (string)

Initiator -> (structure)

Identifies who initiated the multipart upload.

ID -> (string)

If the principal is an AWS account, it provides the Canonical User ID. If the principal is an IAM User, it provides a user ARN value.

DisplayName -> (string)

Name of the Principal.

CommonPrefixes -> (list)


Prefix -> (string)

EncodingType -> (string)

Encoding type used by Amazon S3 to encode object keys in the response.