How to use the Invisible Character Detector
Paste or type your text into the box above. The tool will scan your text and show how many invisible characters it finds.
The highlighted text area helps you see where invisible characters appear. True invisible characters are marked with colored labels, while normal spaces, tabs, and line breaks will be shown in light gray as visual guides.
The invisible characters list shows the type of invisible character, its Unicode value, and how many times it appears in your text. For identifying individual characters, you may also find our character identifier useful.
Try it yourself
Copy the sample text below and paste it into the detector. It contains a zero-width space, a non-breaking space, a soft hyphen, and a byte order mark.
Tip: Click inside the sample box to select the text, or use the Copy Sample button.
What are invisible characters?
Invisible characters are text characters that may not appear as normal letters, numbers, or punctuation. Some characters have no visible width at all, while others look like ordinary spacing but behave differently.
Common examples include zero-width spaces, non-breaking spaces, soft hyphens, zero-width joiners, zero-width non-joiners, byte order marks, and direction marks. If you want to compare how many different characters appear in text, try our unique character counter.
These characters often appear when text is copied from websites, PDFs, documents, spreadsheets, emails, messaging apps, social media posts, or code editors. If you are checking text from a PDF, our PDF character counter may also be helpful.
Why invisible characters can cause problems
Invisible characters can make text look correct while causing it to behave incorrectly. A word, username, URL, password, file path, spreadsheet cell, or code snippet may look normal but contain invisible characters that change its actual value.
For example, two pieces of text may appear identical on screen, but a hidden zero-width space, byte order mark, or non-breaking space can make them different to a computer. Developers working with text may also want to see our guides on counting characters in SQL, counting characters in JavaScript, or counting characters in Python.
Common invisible characters this tool can detect
Zero-width space: A hidden character that takes up no visible space but can still exist inside text.
Non-breaking space: A space-like character that prevents words from breaking onto separate lines. It may look like a regular space but behaves differently.
Soft hyphen: A hidden character that can control where a word may break across lines.
Zero-width joiner and zero-width non-joiner: Unicode characters that can affect how certain characters, scripts, and emoji sequences display.
Byte order mark: A Unicode marker that may appear at the beginning of a text file and can sometimes cause unexpected issues in code or data. For text encoding checks, our byte counter can also be useful.
Direction marks: Hidden formatting characters that can affect text direction, especially when left-to-right and right-to-left text are mixed.
Why are spaces, tabs, and new lines shown differently?
Regular spaces, tabs, and new lines are technically invisible, but they are usually normal parts of readable text. Most people can infer them from spacing, indentation, or line breaks.
For that reason, this tool focuses the invisible character count on characters that are harder to notice. Spaces, tabs, and new lines can still be shown as light gray visual guides in the highlighted text, but they are not treated as the main invisible characters. If you only need to count lines, use our line counter.
Who should use an invisible character checker?
This tool can be useful for writers, editors, students, developers, content managers, data analysts, and anyone who works with copied or pasted text.
It is especially helpful when text looks normal but behaves strangely, such as when a search does not work, a form rejects input, a URL breaks, or code throws an unexpected error. If you are working in documents or spreadsheets, you may also like our guides for Google Docs, Google Sheets, Microsoft Word, and Microsoft Excel.
Can I remove invisible characters?
Yes. The "Remove Invisible Characters" button removes hidden Unicode characters that are likely to cause confusion, such as zero-width spaces, byte order marks, soft hyphens, joiners, direction marks, and similar characters.
The button is designed to keep normal readable formatting, such as regular spaces, tabs, and line breaks, so your text does not get collapsed into one unreadable block.
Why use our Invisible Character Detector?
Finding invisible characters manually can be frustrating, especially in long text. This detector makes the process easier by counting invisible characters, showing where they appear, and listing the exact character types found.
Simply paste your text into the tool above and review the results instantly. It is free, fast, and works directly in your browser. For other text tools, visit our tools page.