Invisible Character Detector

How the invisible character detector works

Hidden characters text editors usually keep out of sight are what this detector reveals. Paste any text, and every invisible or unusual space character gets a yellow label with its code.

Detector tabs and options

• Paste box: paste text from any source.
• Load example: fills the box with sample text that holds hidden characters, so you can see how it works.
• Clear: empties the box.
• Also highlight normal spaces: marks regular spaces too, handy for spotting double spaces.
• Stats: total characters, how many are invisible, and how many types.
• What's hidden tab: your text with a yellow code label at each hidden character.
• List tab: each character's name, code, count and what it does.
• Clean text tab: Remove zero-width & fillers, Turn odd spaces into normal spaces, and Merge double spaces. It shows how many characters were removed and has a Copy clean text button.
• Code values tab: the codes for each character found.

How to read the result

Each yellow label is one invisible character with its code, such as 200B for a zero width space. The List tab counts how often each one appears, so you can see which matters most. The Code values tab shows its HTML, CSS and JavaScript codes.

When should you check text?

Before pasting into a password field, a spreadsheet formula, code, an SEO title or a form that keeps rejecting input. When text looks right but still fails, hidden characters are the most common cause.

Where do hidden characters come from?

Text copied from PDFs, websites, ChatGPT or WhatsApp often carries zero-width spaces and no-break spaces. It looks normal but can break passwords, spreadsheet formulas, code and SEO titles.

How to use it

Paste your text, check what's highlighted, review the list, then copy the clean version from the Clean text tab.

The characters we see most

No-break space (U+00A0) from websites and documents, narrow no-break space (U+202F) between numbers and units, zero width space (U+200B) from text editors, and U+FEFF at the start of files. The full list is on the Unicode list page.

Find hidden characters in text by symptom

Hidden characters in text rarely announce themselves. Usually you notice a strange symptom first. This table links common problems to the hidden character that most often causes them.

Once you know which character is the cause, the invisible character remover can clean it out.

Reading the codes behind a hidden character

Each hidden character has a code like U+200B. The part after "U+" is a hexadecimal number that identifies the character. The detector also shows the same character in other formats:

• HTML: ​, which you can type into a web page.
• CSS: \200B, used in the content property.
• JavaScript: \u200B, used inside strings.

These codes are useful when you want to search for a character in an editor, write a find-and-replace rule, or tell a developer exactly what you found.

When a hidden character belongs there

Not every hidden character is a mistake. Some are needed for text to display correctly:

• Zero Width Joiner (U+200D): builds combined emoji. Removing it can split an emoji apart. The invisible emoji page explains how this works.
• Zero Width Non-Joiner (U+200C): needed in Persian and some Indic scripts to control how letters join.
• Left-to-Right and Right-to-Left marks (U+200E, U+200F): keep mixed Arabic, Hebrew and English text in the right order.
• Soft Hyphen (U+00AD): marks where a long word may break.

Check the highlighted result before you delete everything. If the text is in one of these languages, remove only the characters you are sure about.

Checking sensitive text privately

The detector runs in your browser, and nothing you paste is stored or sent. That makes it safe for checking text like passwords, private messages or contract wording before you use them.

A good habit is to check any hidden character text you copy from a source you do not control, such as a PDF, a web page or an AI chat tool, before it goes into a form, a spreadsheet or code. It takes a few seconds and can save a long search for a bug you cannot see.

For longer reads about where hidden characters come from, browse the BlankText.id blog.

Frequently asked questions

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