COSBrowser Overview

Last updated: 2026-03-24 11:11:07

COSBrowser is a visualization interface tool provided by Tencent Cloud COS. You can use it to view, transfer, and manage COS resources easily. Currently, it is available for desktop and mobile clients as described below. If you need to migrate or batch upload data, you can use Migration Service Platform (MSP).

Download Address

COSBrowser
OS
System Requirements
Download Address
Desktop
Windows
Windows 7 32/64-bit or later, Windows Server 2008 R2 64-bit or later
macOS
macOS 10.13 or above
Linux
Requires a graphical interface and supports AppImage format. Note: To launch the client on CentOS, run ./cosbrowser.AppImage --no-sandbox in the terminal.
Mobile Version
Android
Above Android 4.4
iOS
iOS 11 or above
Web
Web
Browsers such as Chrome, Firefox, Safari, and Internet Explorer 10+

COSBrowser Desktop Version

COSBrowser Desktop focuses on resource management, allowing users to upload and download data in bulk.
Note:
COSBrowser Desktop Version uses a system-configured proxy to connect to the internet. Please make sure that your proxy is set up properly or disable the proxy configuration if it fails to connect to the internet.
Windows users can find the information in the "Internet Options" of the operating system.
For queries on macOS, go to Network Preferences.
For queries on Linux, go to System Settings > Network > Network Proxy.
COSBrowser Desktop Version has the following features:
SDK
Note
Creates or deletes buckets
Views the basic information of a bucket
Views the current storage capacity and number of objects in a bucket
Modifies the permissions on buckets and objects
Enables/Suspends bucket versioning
Adds access paths
This feature allows you to upload files/folders to a bucket separately, in batches, or incrementally
This feature allows you to download files/folders to the local file system separately, in batches, or incrementally
Deletes files/folders from a bucket separately or in batches
Synchronizes local files to a bucket in real time
Copies files/folders separately or in batches from one directory to another
Renames files in a bucket
Creates folders in a bucket
Views the basic information of files in a bucket
Generates file access links with a certain validity period by requesting a temporary signature
Shares a file/folder and sets a validity period for the sharing
Exports file URLs in batches
Previews media files (images, video, and audio) in your bucket
Searches for files in a bucket through prefix search
Searches for created buckets
This feature allows you to view the historical versions of files in a bucket where versioning is enabled
View file fragment details within the bucket
Compares files in a local folder to those in a bucket
Transcodes videos with the media processing feature enabled in a bucket
Generates an authorization code for logging in to the COSBrowser client
Scales, crops, or rotates an image, or adds text or image watermarks, and generates a URL of the output image
Sets up a proxy for COS access
Sets the number of concurrent transfers for file upload or download
Sets the number of parts for multipart upload or download
Sets the number of retries upon upload or download failure
Limits the upload and download speeds for a single thread
Double-checks files uploaded to a bucket
Saves records of operations on COSBrowser in the form of local logs

COSBrowser Mobile Version

COSBrowser Mobile Version is mainly used to monitor COS resources (such as storage usage and traffic) at any time you want. For more supported features, see basic features in User Guide for Mobile Version.

Changelog

Desktop Version changelog: changelog.
Mobile Version changelog: changelog_mobile.

Feedback and Suggestions

If you have any questions or suggestions when using COSBrowser, feel free to give us your feedback:
Feedback on Desktop Version: issues.
Feedback on Mobile Version: issues_mobile.

Summary

Of course, COS not only offers the above applications and services but also provides a variety of popular open-source applications integrated with Tencent Cloud COS plugins. Click here to launch and start using them immediately!