---
title: "presign"
slug: "presign"
updated: 2026-10-08T04:57:39Z
published: 2026-10-08T04:57:39Z
canonical: "cli.ncloud-docs.com/presign"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://cli.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# presign

Available in Classic and VPC

Create a pre-signed URL for an object uploaded to Ncloud Storage. Using a pre-signed URL allows you to download the object without additional authentication within its validity period.

## Syntax

The `presign` syntax is as follows:

```
aws s3 presign \
    <s3-uri> \
    [--expires-in <expires-in>] \
    --endpoint-url <endpoint-url>
```

## Options

This section describes the options available when running `presign`.

### Required options

The following options are required for `presign`.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `&lt;s3-uri&gt;` | String | Required | Object's S3 URI - `s3://{bucket_name}/{object_name}` format |

### Optional options

These are the optional options for `presign`. Options that are not specified will use their default values.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `--expires-in` | Integer | Optional | Time remaining until the pre-signature URL expires (second) - `1`-`604800` (default: `3600`) |

### Common options

For information about the options common to all `aws` subcommands, see [Ncloud Storage options](/docs/en/storage-ncloudstorage#%EC%98%B5%EC%85%98).

## Examples

When you create a pre-signed URL, a URL containing the signature and expiration information is displayed.

### Command

The following is an example command for creating a pre-signed URL with the default validity period.

```
aws s3 presign s3://my-test-bucket/img/image.png \
    --expires-in 3600 \
    --endpoint-url=https://kr.ncloudstorage.com
```

The following is an example command for creating a pre-signed URL with a validity period of one week.

```
aws s3 presign s3://my-test-bucket/img/image.png \
    --expires-in 604800 \
    --endpoint-url=https://kr.ncloudstorage.com
```

### Output

The following is an example output of creating a pre-signed URL with the default validity period.

```
https://kr.ncloudstorage.com/my-test-bucket/img/image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=<access-key-redacted>%2F20260821%2Fkr%2Fs3%2Faws4_request&X-Amz-Date=20260821T051207Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&X-Amz-Signature=<signature-redacted>
```

The following is an example output of creating a pre-signed URL with a validity period of one week.

```
https://kr.ncloudstorage.com/my-test-bucket/img/image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=<access-key-redacted>%2F20260821%2Fkr%2Fs3%2Faws4_request&X-Amz-Date=20260821T051153Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=<signature-redacted>
```