Blank Space Copy and Paste: Six Invisible Characters Compared

Each character in the tool above has a different Unicode identity. The column that matters most is the general category: Unicode sorts every character into one, and apps that "trim whitespace" usually remove characters in the space separator category (Zs) and leave letters and symbols alone.

The highlighted box next to each character in the tool shows how wide it really is. The Zero Width Space collapses to a sliver because it has no width; the others take up roughly the room of a letter or more.

Most blank space copy and paste pages offer a single character, or a long list with no guidance. Knowing the category tells you in advance which of the six is likely to survive the job you have in mind.

Most apps tidy up what you type before they save it. A common rule is to trim spaces from the start and end of a name or message, and to refuse to send one that is empty after trimming. Many also strip zero-width characters, because they are invisible and easy to abuse. None of the major apps publish exactly which characters they remove.

That is the whole reason two of these characters are popular. The Hangul Filler is a letter: it comes from the Hangul Compatibility Jamo block, where it serves as a placeholder in Korean text. The Braille Pattern Blank is a symbol: it is braille cell U+2800 with no dots raised. Neither is in the space separator category, so a trimming rule written for spaces does not touch them. They are "blank" only because their shapes are empty.

The three real spaces behave the way spaces do. They are in category Zs, so trimming at the start and end of a field usually removes them, and a message made only of them is usually treated as empty. Inside a sentence they are kept, which is what makes them useful for spacing. The Zero Width Space is a format character with no width; some apps keep it, many strip it, and a field containing only it often counts as empty.

For a name that looks empty, the order below starts with the character most likely to survive a trimming rule and works down. Paste one at a time, check the preview, and stop at the first one the app accepts. If a name needs a minimum length, set the tool's "How many to copy" menu to 2, 3 or 5 and copy several in one go.

Chat apps generally block a message that is empty, and "empty" usually means nothing left after spaces are trimmed. That is why pressing the space bar and sending does nothing. A message made of one Hangul Filler or one Braille Pattern Blank is not empty by that test, because neither is a space, so it may go through and arrive looking blank.

We did not test this in WhatsApp, Instagram, Discord or any other app, and none of them document blank characters in their help pages, so we can only describe the mechanism. If the app strips or replaces the character, you will see the send button stay disabled or the message arrive with a placeholder. Copy several at once if a single one looks like a stray dot or box in the app's font.

When the goal is a wider gap, an indent or a line that does not wrap, the real spaces are the right tools, and they are much less likely to be stripped because they sit between visible words.

The No-Break Space (U+00A0) looks like an ordinary space but stops a line from breaking at that point, so "10 km" or a two-word name stays together. Web pages and many apps collapse several ordinary spaces into one; the No-Break Space does not collapse that way, so a run of them can push text sideways. The Em Space (U+2003) is a single wide space, about the width of the letter M, useful for a clear gap between items in a bio. The Ideographic Space (U+3000) is as wide as a Chinese, Japanese or Korean character and is the space our fullwidth text style uses between words, so it keeps wide letters evenly spaced.

Invisible characters are hard to debug because you cannot see them. The tool has a checker for this: paste anything into the box under the list and it shows how many characters you pasted and the code point of each one. Paste a blank name back from an app, and you can see whether it still contains U+3164 or whether the app swapped it for something else.

The checker is also useful in reverse. If a username or a line of text behaves strangely, failing to match in search, refusing to log in, or wrapping in odd places, paste it in. A stray U+200B or U+00A0 inside a word is a common cause, since software compares characters, not appearances, and a word with an invisible character inside it is a different word.

Be careful with invisible characters in anything that must match exactly: passwords, email addresses, codes and links. A blank you cannot see will make them fail in ways that are hard to spot.

If you came here for blank space copy and paste to fix a layout rather than make something invisible, the checker is the fastest way to find which character is actually in your text before you swap it.

No official help page from WhatsApp, Instagram or Discord documents blank or invisible names or messages, so any claim that a particular blank "works on" one of them comes from users trying it, and app updates can change the result without notice. The same goes for games. Roblox, for example, filters all text and does not publish a list of allowed characters.

The one thing a platform does document is Discord's username rule, which rules blank characters out of usernames entirely. Everywhere else, the honest advice is to paste, check the preview, and keep a normal name ready in case the app rejects or later removes the blank.

Think about who will read it, too. A screen reader may announce a Hangul Filler or Braille Pattern Blank by name, or say nothing, depending on the reader, so a blank name can be confusing to people who navigate by audio. W3C accessibility guidance asks that content not rely on visual presentation alone; in a group chat, a blank name means nobody can tell who said what.