---
title: "Share an object with a presigned URL"
description: "Generate a presigned URL for one object in a TIR Object Storage bucket, so someone can download or upload it with that link alone, until it expires."
content_type: "how-to"
product: "tir-object-storage"
platform: "TIR"
url: "/tir/tir-object-storage/how-to/share-an-object-with-a-presigned-url/"
topic: ["work-with-data"]
---

# Share an object with a presigned URL

Generate a link to one object path that works for anyone who has it, until it expires. Use it to
share one object with someone outside the project instead of handing out the secret key.

## Before you begin

- A bucket with the object you want to share, or the path where an outside application will upload.
- Permission to update and to create datasets in the project. The **Actions** menu shows
  **Generate Presigned URL** with update permission, and generating the link needs create
  permission. A Member gets both through a policy that allows them.

## Generate the link

1. In the list, open the **Actions** menu of the bucket and select **Generate Presigned URL**. To
   make a link for one version of an object, use **Generate Presigned URL** in that version's
   **Actions** instead; see [Use object versioning](/tir/tir-object-storage/how-to/use-object-versioning/).
2. In **Object path**, enter the path inside the bucket, for example `train/images/example.png`.
   For a version, the portal fills in the path for you, and the path stays fixed.
3. In **Type**, choose **Download** to let someone fetch the object, or **Upload** to let an outside
   application write one into the bucket.
4. Set **Expiry time** in **Minutes**, **Hours**, or **Days**. It starts at 1 hour and runs from 1
   minute to 7 days. Any other value shows "Enter a time between 1 minute and 7 days."
5. Select **Generate URL**, then copy the link.

Copy the link now: TIR shows it only once, and it cannot be retrieved after you close the dialog. If you lose it, generate a new one. Several links can be live at once, each valid
until its own expiry.

## Test the link

Open the link in a browser or an S3-aware client before it expires. A **Download** link fetches the
object.

To find an object's path, [browse the bucket's objects](/tir/tir-object-storage/how-to/browse-download-and-delete-objects/). For help with a message, see
[Troubleshooting TIR Object Storage](/tir/tir-object-storage/troubleshooting/tir-object-storage/).