Paths are specified as remote:path

Paths may be as deep as required, e.g. remote:directory/subdirectory.

The initial setup for Uloz.to involves filling in the user credentials. rclone config walks you through it.


Here is an example of how to make a remote called remote. First run:

 rclone config

This will guide you through an interactive setup process:

No remotes found, make a new one?
n) New remote
s) Set configuration password
q) Quit config
n/s/q> n
name> remote
Type of storage to configure.
Choose a number from below, or type in your own value
XX / Uloz.to
   \ "ulozto"
Storage> ulozto

Option app_token.
The application token identifying the app. An app API key can be either found in the API doc 
https://uloz.to/upload-resumable-api-beta or obtained from customer service.
Enter a value. Press Enter to leave empty.
app_token> token_value

Option username.
The username of the principal to operate as.
Enter a value. Press Enter to leave empty.
username> user

Option password.
The password for the user.
Choose an alternative below. Press Enter for the default (n).
y) Yes, type in my own password
g) Generate random password
n) No, leave this optional password blank (default)
y/g/n> y
Enter the password:
Confirm the password:

Edit advanced config?
y) Yes
n) No (default)
y/n> n

Keep this "remote" remote?
y) Yes this is OK (default)
e) Edit this remote
d) Delete this remote
y/e/d> y

Once configured you can then use rclone like this,

List folders in root level folder:

rclone lsd remote:

List all the files in your root folder:

rclone ls remote:

To copy a local folder to a Uloz.to folder called backup:

rclone copy /home/source remote:backup

User credentials

The only reliable method is to authenticate the user using username and password. Uloz.to offers an API key as well, but it's reserved for the use of Uloz.to's in-house application and using it in different circumstances is unreliable.

Modification times and hashes

Uloz.to doesn't allow the user to set a custom modification time, or retrieve the hashes after upload. As a result, the integration uses a free form field the API provides to encode client-provided timestamps and hashes. Timestamps are stored with microsecond precision.

A server calculated MD5 hash of the file is verified upon upload. Afterwards, the backend only serves the client-side calculated hashes. Hashes can also be retrieved upon creating a file download link, but it's impractical for list-like use cases.

Restricted filename characters

In addition to the default restricted characters set the following characters are also replaced:

Character Value Replacement
\ 0x5C

Invalid UTF-8 bytes will also be replaced, as they can't be used in JSON strings.


All files are currently uploaded using a single HTTP request, so for uploading large files a stable connection is necessary. Rclone will upload up to --transfers chunks at the same time (shared among all uploads).

Deleting files

By default, files are moved to the recycle bin whereas folders are deleted immediately. Trashed files are permanently deleted after 30 days in the recycle bin.

Emptying the trash is currently not implemented in rclone.

Root folder ID

You can set the root_folder_slug for rclone. This is the folder (identified by its Folder slug) that rclone considers to be the root of your Uloz.to drive.

Normally you will leave this blank and rclone will determine the correct root to use itself. However you can set this to restrict rclone to a specific folder hierarchy.

In order to do this you will have to find the Folder slug of the folder you wish to use as root. This will be the last segment of the URL when you open the relevant folder in the Uloz.to web interface.

For example, for exploring a folder with URL https://uloz.to/fm/my-files/foobar, foobar should be used as the root slug.

root_folder_slug can be used alongside a specific path in the remote path. For example, if your remote's root_folder_slug corresponds to /foo/bar, remote:baz/qux will refer to ABSOLUTE_ULOZTO_ROOT/foo/bar/baz/qux.

Standard options

Here are the Standard options specific to ulozto (Uloz.to).


The application token identifying the app. An app API key can be either found in the API doc https://uloz.to/upload-resumable-api-beta or obtained from customer service.


  • Config: app_token
  • Type: string
  • Required: false


The username of the principal to operate as.


  • Config: username
  • Type: string
  • Required: false


The password for the user.

NB Input to this must be obscured - see rclone obscure.


  • Config: password
  • Type: string
  • Required: false

Advanced options

Here are the Advanced options specific to ulozto (Uloz.to).


If set, rclone will use this folder as the root folder for all operations. For example, if the slug identifies 'foo/bar/', 'ulozto:baz' is equivalent to 'ulozto:foo/bar/baz' without any root slug set.


  • Config: root_folder_slug
  • Type: string
  • Required: false


The size of a single page for list commands. 1-500


  • Config: list_page_size
  • Type: int
  • Default: 500


The encoding for the backend.

See the encoding section in the overview for more info.


  • Config: encoding
  • Type: Encoding
  • Default: Slash,BackSlash,Del,Ctl,InvalidUtf8,Dot


Description of the remote.


  • Config: description
  • Type: string
  • Required: false


Uloz.to file names can't have the \ character in. rclone maps this to and from an identical looking unicode equivalent (U+FF3C Fullwidth Reverse Solidus).

Uloz.to only supports filenames up to 255 characters in length.

Uloz.to rate limits access to the API, but exact details are undisclosed. Practical testing reveals that hitting the rate limit during normal use is very rare, although not impossible with higher number of concurrently uploaded files.

rclone about is not supported by the Uloz.to backend. Although there's an endpoint to retrieve the information for the UI, it's not exposed in the API. Backends without this capability cannot determine free space for an rclone mount or use policy mfs (most free space) as a member of an rclone union remote.

See List of backends that do not support rclone about and rclone about