# cryptsetup-convert

## NAME



           cryptsetup-convert - converts the device between LUKS1 and LUKS2
           format
    


## SYNOPSIS



           **cryptsetup** _convert_ **--type <format> [<options>] <device>**
    


## DESCRIPTION



           Converts the device between LUKS1 and LUKS2 format (if possible).
           The conversion will not be performed if there is an additional
           LUKS2 feature or LUKS1 has an unsupported header size.
    
           For conversion from LUKS2 to LUKS1, all active keyslots must use
           the PBKDF2 key-derivation function. The PBKDF2 and anti-forensic
           filter (AF) hash must be the same as the hash used in the digest.
           All keyslot numbers must be lower than 8 (LUKS1 maximum slot
           number). There must be at least one active keyslot and no unbound
           or reencryption keyslots.
    
           Conversion (both directions) must be performed on an inactive
           device. There must not be an active dm-crypt mapping established
           for the LUKS header requested for conversion.
    
           The **--type** option is mandatory with the following accepted values:
           _luks1_ or _luks2_.
    
           **WARNING:** The _convert_ action can destroy the LUKS header in the
           case of a crash during conversion or if a media error occurs.
           Always create a header backup before performing this operation!
    
           **< options> **can be [--header, --type, --disable-locks].
    


## OPTIONS



           **--batch-mode** , **-q**
               Suppresses all confirmation questions. Use with care!
    
               If the --verify-passphrase option is not specified, this
               option also switches off the passphrase verification.
    
           **--debug** or **--debug-json**
               Run in debug mode with full diagnostic logs. Debug output
               lines are always prefixed by **#**.
    
               If --debug-json is used, additional LUKS2 JSON data structures
               are printed.
    
           **--disable-locks**
               Disable lock protection for metadata on disk. This option is
               valid only for LUKS2 and is ignored for other formats.
    
               **WARNING:** Do not use this option unless you run cryptsetup in a
               restricted environment where locking is impossible to perform
               (where /run directory cannot be used).
    
           **--header** _< device or file storing the LUKS header>_
               Use a detached (separated) metadata device or file where the
               LUKS header is stored. This option allows one to store the
               ciphertext and LUKS header on different devices.
    
               For commands that change the LUKS header (e.g., _luksAddKey_),
               specify the device or file with the LUKS header directly as
               the LUKS device.
    
           **--help** , **-?**
               Show help text and default parameters.
    
           **--type** _type_
               Specifies required device type, for more info, read the _BASIC_
               _ACTIONS_ section in cryptsetup(8).
    
           **--usage**
               Show short option help.
    
           **--version** , **-V**
               Show the program version.
    


## CRYPTSETUP



           Part of cryptsetup project
           <https://gitlab.com/cryptsetup/cryptsetup/>. This page is part of
           the _Cryptsetup_ ((open-source disk encryption)) project.
           Information about the project can be found at 
           ⟨https://gitlab.com/cryptsetup/cryptsetup⟩. If you have a bug
           report for this manual page, send it to dm-crypt@saout.de. This
           page was obtained from the project's upstream Git repository
           ⟨https://gitlab.com/cryptsetup/cryptsetup.git⟩ on 2025-08-11. (At
           that time, the date of the most recent commit that was found in
           the repository was 2025-08-01.) If you discover any rendering
           problems in this HTML version of the page, or you believe there is
           a better or more up-to-date source for the page, or you have
           corrections or improvements to the information in this COLOPHON
           (which is _not_ part of the original manual page), send a mail to
           man-pages@man7.org
    
    cryptsetup 2.8.1-git            2025-08-09          _CRYPTSETUP-CONVERT_(8)
    


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