Invisible character
A real character with no visible glyph. Blank usernames, empty messages, invisible spacing: it copies as nothing and pastes as something.
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What an invisible character is
An invisible character is a real Unicode character with no visible glyph. To you it looks like nothing; to an app it is genuine text that can be sent, saved and counted. That difference is what makes blank usernames, empty messages and invisible spacing possible on platforms that reject plain spaces.
The big button copies the Hangul filler (U+3164), which works in the most places: WhatsApp blank messages, Discord and game-style empty names, Instagram line spacing, form fields that demand something. The list gives the other blank characters for platforms that filter specific ones, and the generator produces any amount of invisible text at once. The tester names the exact characters on your clipboard so you know the copy worked before you use it somewhere that matters.
Why does my blank username get rejected?
Some platforms filter specific invisible characters. Try another one from the list: the braille blank (U+2800) often passes where the Hangul filler is blocked, and zero-width characters work where any visible width is rejected.
Zero-width versus blank?
A blank character (Hangul filler, braille blank) takes up visible width, like a space that platforms cannot strip. A zero-width character (U+200B, U+200C, U+200D) has no width at all: useful for invisible separators or minimum-length rules without any visible gap.
Is this safe to use?
They are ordinary Unicode characters, the same ones used legitimately in Korean text and complex scripts. Nothing is exploited. Just avoid using them to impersonate someone else's blank-looking name.