Username Generator for Cross-Platform Social Handles
RecurPost’s Username Generator creates username suggestions for 8 social media platforms. The tool generates usernames that meet the specific requirements of each supported platform, because every platform follows different username rules. X limits usernames to 15 characters, LinkedIn allows up to 100, Instagram supports periods and underscores, and a Bluesky handle is a domain name that accepts neither inside its label.
If your agency registers a username on Instagram before checking the other platforms, you may end up using different usernames for the same brand across different networks. The sections below explain the username limits for all 8 supported platforms, identify a naming format that works across all of them, and show you how to shortlist a username before registering it. It is one of RecurPost’s free tools.
No sign-up
8 platform generators
Letters and numbers only
RecurPost’s Username Generator Produces Username Ideas for 8 Social Platforms
RecurPost’s Username Generator creates username ideas for Instagram, X, TikTok, Facebook Pages, YouTube, LinkedIn, Pinterest, and Bluesky. You enter a keyword or brand name, choose a style such as casual, professional, trendy, short, or descriptive, and the tool creates several username ideas at once. You do not need to create an account or sign up to use the tool.
RecurPost creates usernames separately for each social platform. The same keyword can create different username ideas for X and LinkedIn, because each platform has different rules for username length and allowed characters. A username generator that returns the same list for every platform does not consider those different rules.
For example, a 4-person agency working with a regional dental group has 4 locations, and the contract includes Instagram, Facebook, TikTok, and Pinterest. Each location needs a username that matches the same brand and follows the rules of each platform, which means the agency must choose 16 usernames. Doing that manually takes more time than the naming itself.
RecurPost’s Username Generator is useful when a client’s brand name is already taken, is not clear, or exceeds the character limit of a platform. It may not be the ideal fit for a client who already uses the same username on every platform, because the naming work is already complete and the remaining work is setting up the profiles.
Platform generators
One generator per network, Instagram through Bluesky.
Naming styles
Casual, professional, trendy, short, or descriptive, chosen before you generate.
Cost to generate
No account, no email address, and no fee to generate a username on this page.
Character ceiling
X sets the shortest limit of the 8 platforms, so it decides the cross-platform handle.
The Strictest Platform Rule Decides the Cross-Platform Handle
The strictest platform in a client’s account set decides the handle for all of them. X allows 4 to 15 characters, while LinkedIn allows 3 to 100. A 20-character name that works on LinkedIn cannot be used on X, so the handle should be created to fit X’s 15-character limit from the beginning. The limits every generator writes to are below.
X (formerly Twitter)
4 to 15 characters; letters, numbers, underscores
Bluesky
3 to 18 characters in the bsky.social label; letters, numbers, hyphens, but not at either end
TikTok
Up to 24 characters; letters, numbers, periods, underscores
Up to 30 characters; no consecutive, leading, or trailing periods
3 to 30 characters; letters, numbers, underscores
YouTube
3 to 30 characters; letters, numbers, periods, hyphens, underscores
Facebook Page
5 to 50 characters; letters, numbers, periods
3 to 100 characters; letters, numbers, hyphens
Platform rules verified in August 2026, and platforms can change them without notice. A handle that works the same across all 8 platforms is 5 to 15 characters long and uses only letters and numbers. X sets the 15-character limit, and Facebook sets the 5-character minimum.
Separator characters do not survive every platform. Underscores do not work on Facebook, LinkedIn, or Bluesky. Periods are not allowed on X, LinkedIn, or Pinterest, and on Bluesky a period only separates the segments of the handle domain rather than sitting inside a label. Bluesky allows hyphens, while Instagram, X, TikTok, Facebook, and Pinterest do not. That leaves letters and numbers as the only characters that work across all 8 platforms, which rules out the underscore style (brand_name) and the period style (brand.name) that agencies commonly use.
A freelancer launching a 22-character client brand on Instagram, TikTok, X, and Pinterest reaches the limit immediately. Instagram accepts the full 22-character name and TikTok also accepts it, but X does not allow names longer than 15 characters. The freelancer must either shorten the name on all 4 platforms or use a different handle on X.
Apply the 5-to-15-character rule with letters and numbers only when the client wants the same handle across every social account. You can ignore the rule when X is not included in the contract, because Bluesky then becomes the strictest platform with an 18-character bsky.social label limit and the best handle choice changes.
Generating and Shortlisting Usernames for a Client’s Account Set
Generate username ideas for the strictest platform first, then check whether the same usernames work on the remaining platforms. RecurPost’s Username Generator creates usernames separately for each social platform, so the order in which you use the tool decides how much rework you do later.
Start with the strictest platform
Start with X whenever it is part of the client’s account set, because a username that fits X’s 15-character limit also fits every other platform on the list.
Enter the keyword and style
Enter the client’s brand name or keyword and choose the naming style, then read the username ideas the generator returns for that platform.
Keep three options
Keep three username options instead of one, because registration is first-come, first-served and an available username can be gone by the time the client reaches the signup page.
Check the remaining platforms
Take those three options to the other platforms in the client’s account set and confirm each one there, instead of generating separately for every platform and hoping the lists overlap.
A social media manager handling a 5-platform client account creates username ideas for X first, keeps three options, then checks those same options on the other 4 platforms. The alternative is generating usernames separately for all 5 platforms and hoping the results overlap, which in most cases they do not. This approach works best when the client’s accounts include X or Bluesky, because those platforms have the stricter limits. It may not be the ideal fit for a client using only LinkedIn and YouTube, where both platforms allow at least 30 characters and a longer, more descriptive username becomes the better choice.
Handle Rules for Each Platform
RecurPost provides a separate username generator for each of the 8 social platforms instead of one generator with a platform selector. Each tool follows the username rules and naming style of its own platform, so the generated username ideas match that platform’s requirements.
Instagram usernames
Periods and underscores are allowed, but they cannot appear together, be repeated, or be placed at the beginning or end of the username.
X usernames
X has the shortest limit among the 8 platforms. It allows underscores but does not allow any other separator character.
TikTok usernames
TikTok allows letters, numbers, periods, and underscores, and a username cannot end with a period.
Facebook Page usernames
Facebook requires at least 5 characters, the highest minimum among the 8 platforms, and allows letters, numbers, and periods.
YouTube handles
YouTube allows the widest character set of the 8 platforms, covering letters, numbers, periods, hyphens, and underscores.
LinkedIn profile URLs
LinkedIn allows the longest handle of the 8 platforms. It accepts hyphens and does not accept underscores.
Pinterest usernames
Pinterest allows letters, numbers, and underscores, and does not allow periods or hyphens.
Bluesky handles
A Bluesky handle is a domain name. The default is a 3 to 18 character label on .bsky.social, while a custom domain handle follows domain rules up to 244 characters. Hyphens are allowed, but not at the start or end of a label.
An agency onboarding a client across Instagram, X, and LinkedIn works against three different ceilings at once: 30 characters, 15 characters, and 100 characters. Generating per platform shows which name survives all three rather than producing one list that fits only the loosest platform. The per-platform generators suit agencies and freelancers registering a new brand across several networks in the same week. They do not confirm availability, which the platform decides at registration.
Where the Handle Decision Sits in Client Onboarding
RecurPost onboards clients through an email or link invitation, so the handle decision comes before profile connection instead of after it. The client authorizes their own accounts and keeps ownership of every handle they register, which means the agency never needs the client’s password. That matters on the day the client’s marketing lead leaves. Profiles connect to the RecurPost composer and the content calendar once the handles exist.
Settle the handle before the first scheduled post goes out, because a handle change after publishing breaks links already in use, including email footers, printed materials, bios on other platforms, and partner websites. A two-week onboarding usually runs in this order: in week one the agency shortlists 3 handle options and sends them to the client, the client approves one and registers it on each platform, then connects the profiles by invitation. In week two the first scheduled posts go out. This works best when the client is launching a new brand. Leave an established handle unchanged when the client already has a live audience, because the loss of followers and broken links usually costs more than consistency.
No credit card. The client connects each social account by invitation, and the agency schedules to all of them from a single calendar.
When the Username Generator Fits, and When It Does Not
Where it fits
RecurPost’s Username Generator fits the naming and shortlisting step, when a client’s brand name is taken, unclear, or longer than the shortest platform limit allows. It fits an agency registering a new brand across several networks, and it fits producing three candidates before the client reaches a signup page.
Where it does not
It does not reserve a username, register a username, or confirm that a username is available, because each platform checks availability at the moment of registration and no external tool can do that on the platform’s behalf. It is also not a trademark checker, because a username can be free on a platform while still matching someone else’s registered trademark.
One agency sent 3 username options to a client and found 2 already registered by the time the client reached the signup page. The third was available and was registered.
What this page does not show
This page covers username generation only. Profile connection, approvals, the social inbox, scheduling, and reporting all sit inside RecurPost social media management software. Those are the parts that decide whether the RecurPost social media scheduler fits how your agency runs. The rest of RecurPost’s free tools sit at the same point in the workflow, ahead of the composer and the calendar.
Username, Display Name, and Profile URL Are Three Different Things
The username, or handle, is the unique name that appears after the @ symbol, and it is the only one of the three that follows the length and character rules on this page.
The display name is the name people see on the profile, so it can include spaces, capital letters, and other characters a username does not allow.
The profile URL is the public web address, and on LinkedIn and Facebook it is created directly from the username.
A client can use the handle @brightpathpt while keeping the display name “BrightPath Physical Therapy”. The 5-to-15-character rule with letters and numbers applies only to the username, not to the display name, which is why a brand with a long legal name can still hold a short handle on every platform.
Social Media Username FAQs
What is the maximum length for a username that works on every social platform?
Fifteen characters. X sets the shortest ceiling of the 8 platforms, so X decides the length for any handle meant to work everywhere. Build the name to that ceiling first and confirm it upward against the looser platforms, rather than designing a longer name and shortening it later.
Which characters are safe in a username across all social platforms?
Letters and numbers only. Every separator character is rejected by at least one of the 8 platforms, which rules out the underscore style and the period style that agencies default to. The per-platform character rules are listed in the platform limits section above.
Does the RecurPost Username Generator check whether a handle is already taken?
RecurPost’s Username Generator creates username ideas but does not check live username availability. Each social platform confirms whether a username is available when you register it, so keep 3 username options ready to stop a taken username from delaying the client’s onboarding.
Do I need a RecurPost account to use the username generator?
RecurPost’s Username Generator works without an account, sign-up, or credit card. You enter a keyword, choose a style, and the tool creates username ideas. You need a RecurPost account to schedule and publish posts after the social accounts have been created.
Should a client use the same username on every platform?
Using the same username across every platform is a good choice when the client is launching a new brand, because people remember one name and printed materials stay consistent. It may not be the right choice when the client already has a live audience on an existing username, where the loss of followers and broken inbound links can outweigh the benefit.
What is the difference between a username and a display name?
The username is the unique @ name that follows each platform’s character and length rules. The display name is the public profile name and can include spaces, capital letters, and symbols that a username does not allow. A client can register @brightpathpt as the username while using “BrightPath Physical Therapy” as the display name on the same profile.
20 social accounts. $79 per month. One publishing calendar.
Once your client’s usernames are registered, the RecurPost publishing platform helps you manage the remaining workflow from one tool. The Agency plan supports 20 social accounts for $79 per month with no per-user seat charge. The client connects each social account through an invitation, and the agency manages and schedules posts for all connected accounts from a single calendar, with scheduling, approvals, the social inbox, and reporting included. See plans and pricing for every plan and add-on.
No credit card required · Starter, Personal, and Agency plans