How to Make Audio Files Smaller to Post on a Tumblr

Make your audio files smaller than 10MB -- the maximum file size for MP3 files uploaded to Tumblr -- using iTunes on your Windows or Mac computer.

Step

Open the iTunes menu and select Preferences.

Select Preferences from the iTunes menu.
credit: Image courtesy of Apple
Click Import Settings.
credit: Image courtesy of Apple

Step

Click the Import Settings button.

Select MP3 Encoder and Good Quality.
credit: Image courtesy of Apple

Step

Select MP3 Encoder from the Import Using drop-down menu and Good Quality (128kbps) from the Setting menu. Click OK to save your new import settings.

Create a new MP3 version of the audio file.
credit: Image courtesy of Apple

Step

Select the audio file to convert from your iTunes library.

Step

Open the File menu, hover your mouse over Create New Version and select Create MP3 Version.

Step

ITunes then automatically creates a duplicate file using the quality settings you specified earlier in the Import Settings window. Right-click the new file and select Show in Windows Explorer -- or Show in Finder on a Mac -- and check whether the file size is under 10MB.