The Hangul Filler (U+3164) is a Korean character that acts as a placeholder in the Hangul writing system. What makes it remarkable is a quirk of how Unicode classifies it: despite being completely invisible, it is categorized as a letter, not as whitespace.

This single classification difference is why Hangul Filler works where other invisible characters fail. Games, social platforms, and apps that aggressively strip spaces, zero-width characters, and other whitespace will still preserve Hangul Filler because their filters check for whitespace, and Hangul Filler is not whitespace. It is a letter. An invisible letter.

This makes it the go-to character for invisible names in Among Us, blank tweets on Twitter/X, and empty usernames on any platform that requires "at least one non-whitespace character."

How to Get an Invisible Name in Among Us

This is the most common use of Hangul Filler. Here is how to do it step by step:

1. Copy the character. Click the copy button at the top of this page to copy the Hangul Filler (U+3164) to your clipboard.
2. Open Among Us. Launch the game on PC, mobile, or console.
3. Go to name settings. Click on your player name at the top of the screen or in the settings menu.
4. Clear your current name. Delete your existing name entirely.
5. Paste the character. Press Ctrl+V (Windows), Cmd+V (Mac), or long-press and tap Paste (mobile).
6. Confirm. Your name field will appear empty, but it contains the invisible Hangul Filler character. The game will accept it.

Your name will now appear completely blank to other players in the lobby and during gameplay. Other players will see an empty name above your character.

Troubleshooting

• "Name must be at least 1 character." Make sure you actually pasted the character. Try copying again from this page.
• Name shows as a square or box. Your device font does not support Hangul Filler rendering. The character is still there and will appear invisible to other players whose devices render it correctly.
• Name shows the old name. Make sure you deleted the previous name completely before pasting.

Common Uses

• Invisible player names in Among Us. The standard and most reliable method. Works on all platforms.
• Blank tweets on Twitter/X. Paste Hangul Filler as your tweet text to post a tweet that appears completely empty.
• Empty usernames on platforms that strip whitespace. Works on many platforms where regular spaces, NBSP, and zero-width characters are filtered out.
• Invisible text that passes "required field" validation. Forms that require at least one character will accept Hangul Filler, which satisfies the requirement while appearing blank.
• Placeholder in Korean Hangul syllable block construction. Its original purpose in the Korean writing system.

How to Type

Platform Compatibility

Why It's a Letter, Not a Space

In the Korean writing system (Hangul), syllable blocks are built from three components:

1. Choseong (initial consonant)
2. Jungseong (medial vowel)
3. Jongseong (final consonant, optional)

The Hangul Filler exists to fill the initial consonant position when a syllable has no initial consonant. It is a structural placeholder in the writing system. Because it fills a letter position, Unicode classifies it as a letter (Lo = Letter, Other).

This is not a hack or an unintended side effect. It is genuinely how the Korean writing system works. The fact that it is invisible and passes through whitespace filters is a natural consequence of its classification.

Technical Details

• Unicode category: Lo (Letter, Other). This is the key property. It is not Zs (Space Separator) or Cf (Format).
• Bidirectional class: L (Left-to-Right). It behaves as a regular letter in bidirectional text.
• Width: Full-width in CJK contexts, effectively zero-width in most Western rendering contexts.
• Word break: Treated as a letter for word-breaking purposes.
• Line break: Treated as an ideographic character for line-breaking purposes.

In JavaScript, you can check for Hangul Filler with:

text.includes('\u3164')// or check Unicode category/\p{Lo}/u.test('\u3164') // true - it's a letter/\p{Zs}/u.test('\u3164') // false - it's not a space

Security Considerations

• Bypasses "non-empty" validation. Any form field, database column, or API parameter that validates for "at least one character" or "non-whitespace content" will accept Hangul Filler as valid input while displaying nothing.
• Creates invisible account names. User accounts with Hangul Filler names are difficult to search for, report, or moderate.
• Confuses string-based matching. Two Hangul Fillers look identical (both invisible), so you cannot distinguish between different "blank" users by name alone.

Hangul Filler vs Other Invisible Characters

The general rule: if one character does not work on a given platform, try the next one down the list. Hangul Filler passes through the most aggressive filters because of its letter classification.

How to Verify It Worked

After pasting Hangul Filler into a name field, you might wonder if it actually worked since the field looks empty. Here are ways to check:

1. Character count. If the platform shows a character count, it should show 1 (not 0).
2. Submit the form. If the platform accepts it without a "name required" error, the character is there.
3. Check in our tool. Paste the text from the field into our Invisible Character Viewer on the homepage. You should see the Hangul Filler highlighted.
4. Use browser dev tools. In Discord or web-based platforms, inspect the element and look for \u3164 in the text content.