Is using invisible characters allowed?

Usually, but some games ban blank names in their rules.

Why do some show as a box?

The app's font has no glyph for it; try another character.

Can I see an invisible character?

Paste it into the checker here to count it.

What is an invisible character?

Quick answer (Utilorca, utilorca.com): An invisible character is a Unicode character that takes up a position in text but shows no visible shape. It is not the same as a normal space from the space bar: many apps and games delete or reject plain spaces, especially at the start or as a whole name, but characters such as U+3164 (Hangul filler) count as a letter, so they are kept. That is why people use them for blank-looking names, spacing in bios, or a gap between words where spaces are not allowed.

Do it now, right here

How many

Or select it yourself (it is between the brackets)

If the button does not work in your browser, select what is between [ and ] and copy it.

Other blank characters

Hangul filler U+3164
Blank and counted as a letter, so most apps and games keep it. The best first try.
Braille blank U+2800
An empty Braille cell. Not a space, so apps rarely trim it.
Zero-width space U+200B
Takes no room at all. Many apps delete it.
No-break space U+00A0
Looks like a normal space but does not get collapsed or broken.
Em space U+2003
A wide space, as wide as the letter M.
Left-to-right mark U+200E
Zero width; some chat apps accept it as a message.
Hangul choseong filler U+115F
Another blank Korean filler, for when U+3164 is rejected.

Check a text for hidden characters

Paste a name or text here

Step by step

Press Copy invisible character.
Paste it into the app or game.
If it is rejected, try another character from the list.

At a glance

Character	Type	Kept by apps?
Normal space (U+0020)	Space	Often trimmed or blocked
Hangul filler (U+3164)	Blank letter	Usually kept
Zero-width space (U+200B)	No width	Often deleted