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Is there a version of JuicePhone available for Windows?
Currently not, but alternatives from other developers exist, such as the free iPhone Backup Browser.

Are you planning to develop JuicePhone for Windows one day?
Probably not, sorry.

Is JuicePhone really totally free of charge?

I've downloaded JuicePhone, but no window appears when I launch it.
Looks like you're using an outdated version of JuicePhone. Downloading the latest one should solve your problem.

When I open up JuicePhone, it tells me it couldn't find any backups.
By default, JuicePhone only scans for backups in the default location iTunes saves them to. Navigate to /Users/YOUR_USERNAME/Library/Application Support/MobileSync/Backup and check for any folders inside. If there is nothing inside, iTunes did not save any backups to the standard backup directory.

I have a backup from another computer which is not inside the default iTunes backup folder. How do I extract it?
Simply hold the 'Option' keyboard key at JuicePhone's startup. A window should pop up, letting you choose a custom backup directory.

I'm on an older computer and JuicePhone takes an incredibly long time to initialize.
Try disabling the 'Read iTunes applications' option inside the Preferences.

I've opened up JuicePhone and see my backup(s), but how do I extract files from them?
First, make sure you have selected the backup you'd like to extract. Now there are two possibilities: Either click 'Complete' and JuicePhone will extract all files backed up, or click 'Custom' to choose between certain applications and the device's 'Home' and 'Keychain' folders to be extracted.

I can't extract a backup because it's encrypted. Are you planning to support such backups in the future?
Maybe. Finding Apple's exact encryption algorithms isn't that easy, however, so don't count on such a feature being available in the near future.

I've extracted a backup, but I don't understand what came out.
Files of App Store applications are stored inside Application Data/, media such as photos inside Home/Media/, personal data such as notes and text messages inside Home/Library/, phone-related content such as call history inside Wireless/ and the device's keychain which contains saved passwords and authentications inside Keychains/.

The extraction doesn't seem to contain all of the files in the backup, something is missing.
In the vast majority of cases, this is iTunes' fault, not JuicePhone's. It's possible that iTunes produced a corrupt backup, so make a fresh backup of your device, if you can.

I'm specifically looking for notes/messages/contacts/photos/etc. Where do I find those?
Here's a list of locations for data stored by the device's built-in applications:
  • Photos → Home/Media/DCIM/***APPLE/
  • Recordings → Home/Media/Recordings/
  • Books → Home/Media/Books/Purchases/
  • Text messages → Home/Library/SMS/sms.db
  • Contacts → Home/Library/AddressBook/AddressBook.sqlitedb
  • Notes → Home/Library/Notes/notes.sqlite
  • Calendar → Home/Library/Calendar/Calendar.sqlitedb
  • Call history → Wireless/Library/CallHistory/call_history.db

You mentioned some weird-looking .db, .sqlite and .sqlitedb files above. What are they how do I open them?
A lot of information on your device is stored in so-called SQLite databases because they're a lightweight and efficient way to store large (and small) amounts of data. Opening up those files is a little complicated, however. You'll need an external application such as Menial's Base. Since these databases can store anything you want, editors will only show you their general structure; you'll need to understand the database before you can find what you are looking for. Only for advanced users!

Woah, that sounds too complicated for me! Will you release a JuicePhone update that can open those databases directly and display their content in a more convenient manner?
Not in the near future, since that would be lots of extra work and we have other projects going on as well. But you never know exactly, so stay tuned!

You didn't mention the location of music and videos. Where do I find those inside the backup?
iTunes doesn't save your media library in your backups – it's already supposed to be on your computer. With all your songs and movies included, your backups would be extremely large and making them would literally take hours!

I've successfully extracted the files I need, but how do I get them back onto my device?
JuicePhone was designed to help you retrieve your device's files, whether iTunes won't let you restore your backup, your device is lost and you still want to access parts of it (like your notes, text messages, app data, etc.) or you're simply interested in browsing through your device's files and accessing files you normally can't (for example a game's save state, etc.). Its purpose is not to copy the extracted files back onto the device. This can only be accomplished by restoring a complete backup through iTunes.

So there's no possibility to copy the extracted content back to the device on a file-by-file basis?
There are, err…, unofficial means to access your device's files manually, but we can't advise you to use such methods.

Thank you so much, I've solved a problem thanks to JuicePhone! Is there any way I can donate something to support your work?
Thanks for your offer, and yes, there is! You can click the PayPal or the Flattr button on the JuicePhone page to support its further development. In any case, we're already very happy if you drop us an email telling us your story ;)