How to Use CamelCase in Mastodon Hashtags for Accessibility

Mastodon hashtags are case-insensitive, meaning #Accessibility and #accessibility link to the same search results. However, how you write them affects how screen readers and other assistive technologies read the tag aloud. A hashtag written in all lowercase like #accessibility may be read as a single garbled word, while #Accessibility with CamelCase lets the software pronounce each word separately. This article explains what CamelCase is, why it matters for accessibility, and how to apply it when posting on Mastodon.

What Is CamelCase and Why It Matters for Hashtags

CamelCase is the practice of writing a compound word or phrase with each word starting with a capital letter and no spaces between words. The name comes from the capital letters that resemble the humps of a camel. Examples include #SocialMedia, #UserExperience, and #OpenSource.

When a screen reader encounters a hashtag written in all lowercase, it reads the entire string as one continuous word. For example, #accessibilitychecklist might be spoken as “accessibilitychecklist” without any pause or distinction between “accessibility” and “checklist.” This can confuse listeners, especially with longer or less common word combinations.

By contrast, #AccessibilityChecklist uses capital letters to signal word boundaries. Screen readers recognize the capital letters and insert brief pauses between words, making the tag intelligible. This small formatting change improves the experience for people who are blind, have low vision, or have cognitive disabilities that make parsing long strings difficult.

How Mastodon Handles Hashtag Case

Mastodon treats all hashtags as case-insensitive. This means the tag #Accessibility, #ACCESSIBILITY, and #accessibility all point to the same timeline and search results. You do not lose discoverability by using capitals. The capitalization only affects how the tag is displayed and read aloud.

The Mastodon web interface and most mobile apps preserve the capitalization you type. When you post #AccessibilityChecklist, that exact casing appears in your toot. Other users who click the tag see the same casing, though the search results page may display a lowercase version depending on the instance software.

Steps to Write CamelCase Hashtags in Mastodon

Writing CamelCase hashtags in Mastodon requires only a change in typing habit. No special settings or tools are needed. Follow these steps to ensure every hashtag you post is accessible.

1. Identify the words in your hashtag
   Decide which words belong together in a single tag. For example, if you want to tag a post about social media tips, the phrase is “social media tips.” The hashtag should combine all three words without spaces.
2. Capitalize the first letter of each word
   Type the hashtag with an uppercase letter at the start of every word. For the example above, write #SocialMediaTips. Do not use underscores or hyphens between words. Mastodon does not treat underscores as word separators, and hyphens are not valid in hashtags.
3. Type the hashtag in your post composer
   Open the Mastodon web interface or your preferred Mastodon app. In the compose box, type the hashtag exactly as you want it to appear. For instance, type #AccessibilityChecklist with the capital letters as planned. The preview will show the tag with your chosen casing.
4. Review the tag before posting
   Look at the hashtag in the compose preview. Confirm that each word starts with a capital letter. If you see all lowercase letters, delete the tag and retype it with the capitals. Some autocorrect features on mobile keyboards may lowercase the first letter after the hash symbol. Manually correct this before sending.
5. Post and verify the visible casing
   After posting, view your toot on your profile or the public timeline. The hashtag should appear with the capital letters you typed. Click the tag to confirm it links to the correct search results. The search results page may show the tag in all lowercase, but the original post retains your formatting.

Applying CamelCase to Profile and Bio Hashtags

Accessibility extends beyond your posts. Hashtags in your profile name, bio, and header fields also benefit from CamelCase. When you edit your profile, apply the same capital-letter rule to any hashtags you include. For example, write #DigitalRights instead of #digitalrights. Screen reader users who visit your profile will hear the words clearly.

Common Mistakes and Misunderstandings About Hashtag Casing

Thinking That Case Changes Search Results

Some users avoid capital letters because they believe Mastodon treats #Accessibility and #accessibility as different tags. This is not true. Mastodon normalizes all hashtags to lowercase for search and federation. The capitalization is purely cosmetic and does not affect which posts appear in the tag timeline. You can safely use CamelCase without worrying about reduced reach.

Using Underscores Instead of CamelCase

On some platforms like Twitter or Instagram, users add underscores between words in a hashtag to improve readability, such as #social_media_tips. Mastodon does not treat underscores as word separators. The underscore is part of the tag string. A tag like #Social_Media_Tips would be read by screen readers as one continuous string with underscores spoken as “underscore.” This is less accessible than #SocialMediaTips. Always use CamelCase rather than underscores or hyphens.

Forgetting to Capitalize Every Word

A common error is capitalizing only the first word, such as #Socialmedia instead of #SocialMedia. Screen readers treat the string as two parts: the capitalized “Social” followed by the lowercase “media.” The word “media” may still be read as part of the first word. For full accessibility, capitalize the first letter of every distinct word in the tag.

Applying CamelCase to Single-Word Hashtags

Single-word hashtags like #Mastodon or #Accessibility already have only one word. Capitalizing the first letter is sufficient. No additional formatting is needed. The tag is already readable by screen readers as a single word.

Item	Lowercase Hashtag	CamelCase Hashtag
Screen reader output	Reads as one garbled word	Reads each word separately with pauses
Search result behavior	Same as CamelCase version	Same as lowercase version
Example for “social media tips”	#socialmediatips	#SocialMediaTips
Example for “accessibility checklist”	#accessibilitychecklist	#AccessibilityChecklist
Underscore alternative	Not recommended — screen reader says “underscore”	Preferred — no extra characters

Using CamelCase in Mastodon hashtags is a simple, effective way to make your content more accessible. The change requires no technical setup and does not affect how your posts are discovered. Every time you type a multi-word hashtag, apply the capital-letter rule. This practice benefits screen reader users, people with cognitive disabilities, and anyone who prefers clearly readable text. Start using #AccessibleHashtags today in your next Mastodon post.