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What is the quickest tool that can let me choose a rectangle (of a predefined size) within any picture file, and it should crop it to that. Something like the tool you get when uploading a Gravatar ... remember?

Typical image editing software like Paint.NET or Photoshop is too slow, you have to open the image file, select a rectangle manually, crop, save, close ....

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do you want to crop them always on the middle ? – user8228 Nov 30 '09 at 1:47
Anywhere at all, using a movable rectangle. – Jarvis Nov 30 '09 at 2:01

There is JPEGCrop, which is a Windows GUI application for most of the jpegtran features:

A new -crop option has been added to jpegtran for 'lossless' cropping of JPEG images:

    -crop WxH+X+Y  Crop to a rectangular subarea
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my tool of choice:

PhotoFiltre, dead fast, free and portable.

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Nice tool, though you have to keep drawing the selection box over and over again for each pic. – Jarvis Nov 30 '09 at 2:05
This sounds nice. I'll try it out too. +1 – nik Nov 30 '09 at 2:10
zees is a very nice tool. Draw box, right click, crop. And it is very fast! – bobobobo Nov 30 '09 at 2:16
Consider suggesting your particular use-case to the developers of PhotoFiltre and maybe they'll add it to the next version - it sounds like a useful feature to have. – Jason R. Coombs Nov 30 '09 at 3:44

I use MSPaint for this, and it's pretty quick. It's almost a reflex.

The fact that it loads quickly and is available on any (windows) machine you use makes it particularly appropriate.

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I'm glad I'm not the only one who opens Paint on a quasi-regular basis. – goblinbox Feb 12 '12 at 0:03

ImageMagick has crop options.

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It doesn't get any simpler than in Google's Picasa.

Draw the box, hit the button and you are done.

Be aware that Picasa does not make permanent changes to the image - it stores the edits and re-applies them when you view the image.

If you want to send the cropped image, or view it in another app, you would export a copy of the image.

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I don't want to keep "drawing the box" .. I want to define my height, width once and have the program show me a fixed size draggable box. – Jarvis Nov 30 '09 at 2:03
Apologies - I misunderstood your requirement – Kije Nov 30 '09 at 16:06

If you have microsoft office it's quick and easy: 'Open with' Microsoft Office Picture Manager, Click 'edit pictures' at the top, A window will open to the right with 'crop'

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There are lot of online tools to do that quickly:

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