As you may already know, ETH-wallets are just user-interfaces to access the blockchain. This means you can just export your private-key from any ETH-'wallet' and use it to log in to another 'wallet' (interface) like MyEtherWallet or Metamask without creating a new address and transferring your funds.

I just created this small guide on how to export your private-key/keystore-file/mnemonic phrase from ImToken, Jaxx, Eidoo or Parity.

ImToken

There are multiple ways to export your private-key to use it for logging in to MyEtherWallet or Metamask.

1.) Mnemonic Phrase (easiest)

Go to 'Profile' > 'Manage Wallets' and select your wallet.

Now select 'Backup Mnemonic' and enter your password.

Write down the 12 words on paper.

2.) Keystore-File (most secure)

Go to 'Profile' > 'Manage Wallets' and select your wallet.

Now select 'Export Keystore' and enter your password.

Copy the content of the box and create a new file called 'keystore.json' by using your favorite file-manager (e.g. ES File Explorer) and paste the previously copied content and save the file.

Now transfer the file to your PC (you should prefer a USB transfer for security-reasons!).

3.) Private-Key

Go to 'Profile' > 'Manage Wallets' and select your wallet.

Now select 'Export Keystore' and enter your password.

Write down your private-key on paper.

Jaxx

There are also multiple ways for exporting your private-key.

1.) Mnemonic Phrase

Open the menu in the upper right corner > go to 'Tools' > 'Backup Wallet' > 'View Backup Phrase'

Enter your PIN and write down the 12 (orange) words on paper.

2.) Private-Key

 Open the menu in the upper right corner > go to 'Tools' > Display Private Keys

Enter your PIN, select 'Display Ethereum Keys' and write down your Private Key on paper.

Eidoo

Go to 'Preferences' > 'Backup wallet' > 'Backup now' 

Enter your password and write down the 12 words on paper.

Parity

Go to 'Accounts' > Export (on the right side)

Select your account, enter your password and click 'Export' in the bottom right.

The downloaded file is your keystore-file.

In general you should always prefer using a keystore-file. It's an encrypted version of your private-key so you also need to enter a password to access your wallet. I created a guide on how to create a new keystore-file if your previous wallet doesn't support exporting it by using your private-key or mnemonic phrase.

For more information check this link: https://steemit.com/myetherwallet/@xunsh1ne/myetherwallet-creating-a-new-keystore-file-using-your-private-key

Regards,

xuNsh1ne/Nestade