Tumblr – How to Like a Post Without Following

The short answer is no - Tumblr doesn't let you edit the alt text of your photos.

The longer answer is that it should be possible if you tell Tumblr in Settings that you want to edit your posts using plain text/HTML. Then, create a new text post, and add the photo with a normal <img> tag and with whatever alt text you like. This should work, although users reading your blog from their dashboards instead of your homepage will have to click through to see the image at all.

An issue here is that you cannot upload an image to Tumblr using this method - you have to link to an image with the img tag, so it must be hosted elsewhere.

To publish to your tumblr you can send an email to a private email address which can be found out by following these steps:

How do I find my email address for mobile + email publishing?

1. Click your blog's name at the top of your Dashboard or under the list icon at the top right.

2. Click "Blog settings" on the right side of the page.

3. You’ll find your private email address in the “Post by Email” section. (You can always reset this if you’re having issues publishing.)

The settings page has a URL looking like http://www.tumblr.com/blog/<name>/settings.

More information on post by email can be found in the tumblr help.