Skip to content


Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
QuickLook plugin to display the dimensions and size of an image in the title bar instead of the filename. Also preview some unsupported formats like WebP.
Objective-C C
branch: master
Failed to load latest commit information.
app/ add dummy app that register UTI
common correct comment
deps libpbg: Update to 0.9.5
mdimporter simplify
qlImageSize.xcodeproj change project structure
qlgenerator simplify
.gitignore .gitignore


This is a QuickLook plugin for OS X 10.8+ to display the dimensions of an image and its file size in the title bar.

qlImageSize preview window

This plugin can also preview and generate Finder thumbnails for unsupported images formats like :

qlImageSize thumbnails generation

qlImageSize WebP and PPM preview


It's a Spotlight plugin to display informations of unsupported images (WebP, bpg, Portable Pixmap) in the Finder's inspector window.



  • Download the .pkg installer here.
  • Open it.
  • Follow the steps. (you will be asked for an admin password)


  • Launch (in /Applications/Utilities)
  • Copy and paste the following line into the Terminal :

sudo rm -rf "/Library/Application Support/qlimagesize" "/Library/QuickLook/qlImageSize.qlgenerator" "/Library/Spotlight/mdImageSize.mdimporter"

  • Press Enter.
  • Type your password and press Enter.


If you are a Pixelmator user, its own QuickLook plugin might get in the way when previewing WebP files. To fix this you need to edit the file /Applications/ and remove the dict entry that handles webp.


qlImageSize is released under the Simplified BSD license, see LICENSE.

Blog : Cocoa in the Shell

Twitter : @Nyx0uf

About Mavericks (OS X 10.9)

qlImageSize doesn't fully work on 10.9. By fully, I mean it works for certain types of images like tga, bmp, psd, tif but not for the common ones jpg, png, gif.

It is a known bug in the OS and I can't do anything about it, Apple never fixed it and won't. The best way is to update to this ugly as fuck 10.10, how sad.

For more informations, see issue 4.

Something went wrong with that request. Please try again.