I maintain a comic book Tumblr, where I post the covers to every comic book that I read and other assorted comic book ramblings. I tag every post with the series name, writer, artist, publication company and publication year. Recently, newer tags (like iZombie and 2012) don't get remembered when I go to add them in the tag field when posting new issues. They still work like tags when published, but I have to type them out every time instead of having Tumblr autofill like it does with every other tag I've used up to a few weeks ago.

Is there a limit to the number of tags Tumblr can remember and autofill? And if so, is there a way around it?

  • Maybe add a picture of the tag input box auto filling so people know exactly what aspect of tagging you're talking about.
    – hairboat
    Nov 16, 2011 at 13:54

3 Answers 3


Here's the official response from Tumblr support:

Beth, Nov-16 13:33 (EST): Hello,

If you are using a substantial number of tags on your posts, you may find that Tumblr doesn't show all of them in saved tags lists. The list may be shortened in order to ensure the pages where you create and edit posts load quickly.

You can still use as many tags as you wish. But, you will need to fully type out any tags that aren't displayed in the saved tags list. Our apologies for any inconvenience this might cause.

Please let us know if you have any other questions.

Thanks, Beth Tumblr Support [email protected]

So it is expected behaviour, but no mention of what the hard limit is though.

Update from Renee in Tumblr support:

The hard limit for tag autocompletion is "closer to around 100 actually."


Yes, there is a tag limit in tumblr. The limit is of 199 tagged posts. You can use a tag for only 199 times! After the 200th use, the oldest post will not appear when is searched. There is also a tag limit of 30 tags per post!

  • That is true for listing posts by tag, but the question is about tag auto-completion.
    – Ciaran
    Nov 17, 2011 at 9:43

The REAL Reason Your Posts Don't Show Up In Tags [What Tumblr Doesn't Want You To Know]

You might think you know all about Tumblr's post and tag limits, but here's what they don't want you to know and why Tumblr will never ever have any commercial business value to Yahoo.

Tumblr intentionally prevents more than 3 posts from the same blog to the same tag within 24 hours.

Your post can have ONE tag but when you tag a 4th post with the same tag in 24 hours, the 1st will 'disappear'. Delete / mark private a post, the 1st 'magically' reappears under the tag.

Try it... Create 3 posts tagged with ONLY a single tag. They'll all be under the tag. Create a 4th post with the same tag, you'll see the 1st post will missing!! Delete / mark private or remove the tag from one of the other posts that does display & your first post 'reappears'.

If you go back through your post history and see huge chunks of posts missing, you'll notice if you delete, mark private or remove the tag from some of the posts -- posts from that same 24 hour time period which previous didn't appear -- now appear!!!

Tumblr doesn't document this great 'feature' which essentially eliminates any type of [non-spam] business type usage of Tumblr that wants to promote itself by contributing to any one topic.

If you contact Tumblr about this issue they'll play stupid and send you emails about how only the first five tags are read [even if you clearly told them that its the ONLY tag which appears in the post] and go back and forth with you for WEEKS playing like their STUPID when you ask them WHY you can't create more than 3 posts under the same tag from the same blog within a certain time period or ask them what that time period is. [Or maybe their support people are just stupid -- as I was able to troubleshoot THEIR service and discover this]

Workaround Create MORE BLOGS !!!

The limitation isn't per account, it's per blog so if you own multiple blogs, you can create 3 posts from each blog for the same tag within the same 24 hour period.

Using tags to get followers? Just add a note at the bottom of the posts from your secondary [& tertiary blogs] with a link or follow button for your main blog.

Don't forget to include a little explanation about Tumblr's undocumented post per tag per blog limitation. Apparently Tumblr's infrastructure can handle a single account having dozen's of blogs, but their tagging / tracking code was written so poorly, they had to [secretly] intentionally introduce a 3 post per tag limit for each blog.

As a software engineer, I can tell you that had they properly written and implemented code for tagging and tracking, it would be a lot easier to manage and maintain the tags and tag tracking by allowing MORE posts per blog [especially when they only allow 200 posts per tag total ANYWAY] rather than overloading their entire infrastructure by having users create additional and unnecessary blogs simply to get around the limitation anyway.

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