Tool to quickly hide/blur/redact text in screenshot?
Skitch can do this quickly. See?



Just click the blur button in the side bar and draw over your image to obscure things.



Please note that this app saves files to Evernote by default which can be a problem for sensitive content. You may want to disable it by not signing into your Evernote account or by making the following setting changes:


Set Sync -&gt; Save New Skitch Notes to Evernote to Manual
Uncheck Sharing -&gt; Automatically Share and Copy Link after creating new Skitch Notes