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Free Tumblr Username Checker

Is that Tumblr blog name available?

On Tumblr your username is your blog’s name and its address. Check a name as you type, see if a blog already has it, and get close alternatives that are free. We check 17 more networks at the same time.

  • 1 to 32 characters
  • Only letters, numbers and hyphens
Checks 18 networks:

How it works

How to use the Tumblr Username Checker

  1. 1

    Type the name

    Without the @. The rules light up as you type, so you know it’s allowed before you check.

  2. 2

    Check availability

    See if a blog already uses the name, and if it’s free on TikTok, X, Bluesky and more.

  3. 3

    Pick an alternative

    Taken? We suggest close variations and show the ones that are free on Tumblr.

Tumblr name rules

What a Tumblr blog name can be

These are the rules the checker tests as you type.

  • 1

    Up to 32 characters

    Letters, numbers and hyphens. No spaces, periods or underscores.

  • 2

    Your blog’s address

    The name is your blog at tumblr.com/name and name.tumblr.com, and the @name people mention you by.

  • 3

    One name per blog

    Every blog on your account, the main one and each side blog, needs a name of its own.

  • 4

    Hyphens join words

    A hyphen is the only way to separate words, like slow-coffee. Names aren’t case-sensitive.

Choosing a name

How to pick a Tumblr name that works

  • Say what you post

    Tumblr blogs are followed for a theme. A name that hints at it tells people what they’ll get.

  • Short enough to type

    People @mention you and type your address. Fewer hyphens and words make that easy.

  • Plan your side blogs

    A clear pair like alder-studio and alder-sketches keeps your blogs recognizable as yours.

  • Match your other networks

    The same name on Instagram, X and Bluesky helps people find your blog from there.

Keep going

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Tumblr Username Checker FAQ

Questions, answered.

How do I know if a Tumblr name is available?

Type it into the checker. We look up the blog at tumblr.com/name: if there’s none, it’s most likely free. Tumblr can still hold some names, so a name can look free and be refused.

What characters can a Tumblr blog name have?

Letters, numbers and hyphens, up to 32 characters. No spaces, periods or underscores.

Is my Tumblr username the same as my blog name?

Yes. Your main blog’s name is the name people see and @mention, and each side blog has a name of its own.

Can I have more than one Tumblr blog?

Yes. One account can run several blogs, each with its own name. Postivate publishes to all of them from one sign-in.

Is the Tumblr username checker free?

Yes. There’s no sign-up, and we don’t store the names you check.

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