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Utilities · head to head

Karabiner-Elements vs mpv

Karabiner-Elements logo

Karabiner-Elements

Utilities

Free open source keyboard remapper for macOS, working at driver level before the OS sees a keystroke

From
Free
Rated
-
Full reviewWebsite
mpv logo

mpv

Entertainment

Free open source command line video player with no graphical interface, built for scripting and precision

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Karabiner-Elements it requires granting significant system-level permissions, including input monitoring, which some security-conscious users are reluctant to allow.; mpv there is no graphical interface at all by default, so a typical non-technical user will find it unusable without significant setup.
  • They diverge on capability: Karabiner-Elements covers Low-level key remapping, mpv covers Command line control.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Karabiner-Elements and mpv actually diverge.

Attributes where Karabiner-Elements and mpv differ
AttributeKarabiner-Elementsmpv
PlatformsMacMac, Windows, Linux
CategoryUtilitiesEntertainment

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Karabiner-Elements

  • Low-level key remapping
  • Complex modifications
  • Per-app and per-device rules
  • Complex modification rule library
  • Simple modifications GUI
  • Apple Silicon native

Only in mpv

  • Command line control
  • Lua and JavaScript scripting
  • Plain text configuration
  • Cross-platform
  • Minimal on-screen overlay
  • Embeddable engine

What people use each for

The jobs each tool is most often brought in to do.

Karabiner-Elements

  • A developer who wants to remap Caps Lock to Escape or Control and needs tap versus hold behaviournot mpv
  • Someone switching from a Windows or Linux keyboard layout who wants familiar modifier positions on a Macnot mpv
  • A user with an accessibility need around key repeat rate or modifier key behaviour that macOS settings cannot covernot mpv
  • Anyone who wants serious keyboard customisation without paying for BetterTouchTool or a similar all-in-one toolnot mpv

mpv

  • A developer who wants to script or automate media playback rather than click through a graphical appnot Karabiner-Elements
  • A Linux user who wants a lightweight player without the overhead of a full desktop application shellnot Karabiner-Elements
  • Someone embedding video playback into another tool or workflow rather than using it as a standalone appnot Karabiner-Elements
  • A power user who prefers editing a text config file over navigating a settings panelnot Karabiner-Elements

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Karabiner-Elements

  • It requires granting significant system-level permissions, including input monitoring, which some security-conscious users are reluctant to allow.
  • Writing custom complex modification rules by hand means editing JSON, which is a real barrier for a non-technical user without the community rule library.
  • It only remaps keyboard input, so a user who also wants gesture or window management customisation needs a second tool such as BetterTouchTool or Rectangle.
  • Being an unpaid open source project, support depends on GitHub issues and community forums rather than a vendor support desk with guaranteed response times.
  • It is Mac only, so it does nothing for remapping needs on a Windows or Linux machine in the same household.

mpv

  • There is no graphical interface at all by default, so a typical non-technical user will find it unusable without significant setup.
  • It has no library browser, artwork fetching or organised media collection view, unlike IINA or Infuse.
  • There is no Apple TV, iOS or Android version, so it cannot be used for a living room or mobile streaming setup.
  • Configuration is entirely file and flag based, so getting a specific behaviour set up correctly has a real learning curve compared with a settings panel.
  • Because it is a general-purpose engine rather than a consumer product, there is no dedicated support channel beyond community forums and documentation.

Pricing, plan by plan

Karabiner-Elements

Free
  • Karabiner-ElementsFree
    • Free and open source under the MIT licence
    • Full functionality with no paid tier
    • Optional donation via GitHub Sponsors or PayPal

mpv

Free
  • mpvFree
    • Free and open source under GPL or LGPL depending on build
    • No account, subscription or paid tier
    • Cross-platform, same engine on every OS

Which should you pick?

Choose Karabiner-Elements if

  • You need low-level key remapping.
  • You want to start without paying.
  • You work on Mac.
  • You also want complex modifications.
Karabiner-Elements review

Choose mpv if

  • You need command line control.
  • You want to start without paying.
  • You work on Mac, Windows, Linux.
  • You also want lua and javascript scripting.
mpv review

Questions people ask

Is Karabiner-Elements or mpv better?
Neither clearly leads. Karabiner-Elements starts at Free and mpv at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Karabiner-Elements or mpv?
Karabiner-Elements starts at Free and mpv at Free.
Does Karabiner-Elements or mpv run on more platforms?
Karabiner-Elements runs on Mac. mpv runs on Mac, Windows, Linux.
Can I use Karabiner-Elements for free?
Both have a free tier, so you can try either at no cost before committing.
What is Karabiner-Elements best used for?
Karabiner-Elements is most often used for a developer who wants to remap caps lock to escape or control and needs tap versus hold behaviour, someone switching from a windows or linux keyboard layout who wants familiar modifier positions on a mac, a user with an accessibility need around key repeat rate or modifier key behaviour that macos settings cannot cover, anyone who wants serious keyboard customisation without paying for bettertouchtool or a similar all-in-one tool. Of those, a developer who wants to remap caps lock to escape or control and needs tap versus hold behaviour and someone switching from a windows or linux keyboard layout who wants familiar modifier positions on a mac are not what mpv is typically brought in for.
What can Karabiner-Elements do that mpv cannot?
Karabiner-Elements covers Low-level key remapping, Complex modifications, Per-app and per-device rules, Complex modification rule library. mpv covers Command line control, Lua and JavaScript scripting, Plain text configuration, Cross-platform.

Answered from the vendors’ own pages

Karabiner-Elements: Is Karabiner-Elements really free?

Yes, entirely. It is open source under the MIT licence with no paid tier, though the project accepts voluntary donations.

mpv: Is mpv free?

Yes, entirely, and it is open source with no paid tier of any kind.

Karabiner-Elements: Does it work on Apple Silicon Macs?

Yes, versions from 14 onward run natively on M1 through M4 chips.

mpv: Does mpv have a GUI?

Not by default. It shows the video and a minimal overlay, but there are no menus, library or settings panel; IINA is the graphical Mac interface built on the same engine.

Karabiner-Elements: Do I need to write JSON to use it?

Not necessarily. Simple key swaps use a GUI, and complex modifications can be imported from a public community rule library instead of writing rules by hand.

mpv: Can mpv play from network shares or cloud storage?

It can play many stream types via command line arguments, but it has no built in browsable network or cloud library the way Infuse does.

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