Many users worry that deleting large numbers of tweets will take too long.
The answer depends on how the deletion is performed.
Manual Deletion
Deleting tweets manually can take hours or even days depending on the size of your account.
Automated Deletion
Automation tools allow tweets to be removed continuously.
Delete My Tweets runs the deletion process locally and can remove thousands of tweets over time.
If you want the direct cleanup path, start with Delete All Tweets. If you only need part of your history gone, Delete Old Tweets is usually faster and more selective.
Final Thoughts
Using automation dramatically reduces the time required to clean up your tweet history.