There are two kinds of ways for you to unlock iPad passcode without computer, one is unlocking iPad through iCloud, the other is unlocking iPad via Siri. These two methods are applicable in different situations and before you start unlocking, you need to check the iOS version on your iPad. Compared with iOS 6 and former version, iOS 7 has a much higher level of security. If your system is iOS 6 or earlier, you can choose iCloud to unlock your iPad. Otherwise, you may only have the opportunity to try Siri.
Option 1: Unlock iPad with iCloud
iCloud, built into every Apple device, is a cloud storage and cloud computing service, enabling users to store photos, files, notes, documents, etc. it is not only a powerful and useful back up tool but also a roundabout way for users to unlock iPad without computer. And the most important precondition is that you have turned the "Find My iPad" feature on. Then you can follow the steps below to start.
Step 1: Launch a browser on iPad and go to www.iCloud.com;
Step 2: Sign in the website by entering your Apple ID and password;
Step 3: Click on "Find My iPhone" and then press "All Devices";
Step 4: Select the type of iPad you are using;
Step 5: Press "Erase iPad" option to erase all data.
Option 2: Unlock iPad via Siri
Siri is a virtual assistant which uses voice queries to answer questions, make recommendations, etc. You can ask Siri to perform actions by inputting voice commands and that's the reason why you are likely to cope with iPad locked with passcode with the help of Siri.
Step 1: Press and hold the home button for a few seconds to activate Siri. Ask Siri to open an app that you don't have on your iPad. Siri will scan the iPad and reply you that the app you said doesn't exist on this device. Meanwhile, it will ask you whether search the app in App Store and bring up the App Store icon on your screen;
Step 2: Press the icon and a new browser window will pop out. Then you can get task slide preview by selecting the last app or update other apps. In addition, double push the Home button can obtain the same effect as well;
Step 3: Close the active front screen task, and you can operate your iPad without entering password.
This way sounds good because it doesn't ask you to enter Apple ID and passcode. But unfortunately, this method has been blocked by Apple in new iOS versions. So, only when your iPad is running iOS 8 to iOS 10.1 can you use this method. Besides, it doesn't always guarantee success.