Invisible Character Detector
The invisible character detector finds and reveals hidden Unicode characters in any text. These characters exist in your text but have no visible symbol, so they stay invisible to the human eye while quietly breaking comparisons, searches, and validation. Paste your text and the tool scans it instantly.
It covers four categories of hidden characters — zero-width, whitespace variations, control, and special formatting marks — and reports each one with its short code, exact Unicode point, and how many times it appears. You can then strip a single character, clean everything at once, or copy invisible characters from the built-in library for blank names and testing.
Who Needs This Tool
Developers
Debug text-comparison bugs, clean user input, and find problematic characters in copied code, data, or AI-generated text before it reaches your database.
Content creators
Clean text pasted from websites, documents, rich-text editors, or chat assistants so it stays consistent everywhere you publish it.
QA testers
Probe input validation and security filters with zero-width spaces, control characters, and other special characters that often slip through.
Social media users
Copy invisible characters such as Zero Width Space, Hangul Filler, or Braille Blank to create blank or invisible usernames where the platform allows them.
How to Use the Invisible Character Detector
Paste or type your text
Type into the Input Text box or click Paste to pull text from your clipboard. Detection starts automatically as you type — no button needed.
Read the summary
Four cards show live counts for each category: Zero-Width, Whitespace, Control, and Special. A card highlights when it contains hidden characters.
Inspect the details
The Detected Characters list shows each character's short code, Unicode point, and count. Hover any entry to see its full name.
Clean or copy
Click × on a character to remove every instance of it, or use Clean All to strip them all. Then grab the result with Copy Clean (or Copy Original to keep the hidden characters).
Copying invisible characters
Need invisible characters for a blank username or for testing? Expand the Copy Invisible Characters panel, then click any character card to copy a single character instantly. To copy several at once, Shift+Click a card and choose a quantity of 1, 5, 10, or a custom amount.
Features
Automatic Detection
Scanning runs in real time as you type or paste — the summary cards update instantly with no button to press.
Four Character Categories
Findings are sorted into color-coded Zero-Width, Whitespace, Control, and Special groups so you can spot the right type at a glance.
Detailed Results
Every detected character shows its short code, exact Unicode point (such as U+200B), occurrence count, and a one-click remove button.
Copy Invisible Characters
A built-in library covers popular picks (ZWSP, NBSP, Hangul Filler, Braille Blank) plus the full set, with a quantity selector for 1, 5, 10, or a custom count.
Character Information
Each card carries a short description of what the character does and when to use it, with the full name on hover.
Clean and Copy Actions
Clean All strips every invisible character at once, while Copy Original and Copy Clean let you grab the text with or without the hidden characters.
Frequently Asked Questions
What are invisible characters?
Invisible characters are Unicode characters that show no visible symbol but still exist in the text. They include zero-width spaces, non-breaking spaces, control characters, and various formatting marks. They are often inserted when you copy text from websites, documents, or rich-text editors.
Which Unicode codepoints are invisible?
Common zero-width codepoints include U+200B (Zero Width Space), U+200C (Zero Width Non-Joiner), U+200D (Zero Width Joiner), U+FEFF (Byte Order Mark), and U+2060 (Word Joiner). This detector also flags whitespace variants like U+00A0 (NBSP), control characters, and formatting marks such as the soft hyphen (U+00AD).
Why does my copied text not match even though it looks identical?
This is usually caused by hidden characters. When you copy text from websites or documents, invisible characters like zero-width spaces or non-breaking spaces often come along. They are invisible but still affect text comparison, search, and data processing. Paste both versions and compare the detected characters to find the difference.
Why does text pasted from ChatGPT contain hidden characters?
Text from chat assistants and rich editors can pick up zero-width characters, non-breaking spaces, or other formatting marks during generation or copy-paste. Run the text through this detector and use Clean All or Copy Clean to remove the hidden characters before you publish or store it.
How do I remove invisible characters from text?
You have two options. To target one character, click the × next to it in the Detected Characters list to remove all of its instances. To strip everything, click Clean All. Then use Copy Clean to copy the text with all invisible characters removed.
How do I create a blank or invisible username?
Open the Copy Invisible Characters panel and copy a character such as Zero Width Space (ZWSP), Hangul Filler, or Braille Blank. These appear invisible but count as valid characters. Note that not all platforms accept invisible usernames — some block them with validation.
What is the difference between a regular space and NBSP?
A regular space (U+0020) allows line breaks, while a Non-Breaking Space or NBSP (U+00A0) prevents them. NBSP is often used in typography to keep words together. The two look identical on screen but behave differently in text processing, which is a common source of matching bugs.
Can invisible characters cause security issues?
Yes. Invisible characters can be used to bypass input validation, hide content, or create confusingly similar usernames (homograph attacks). It is good practice to detect and clean user input in any application that processes text.
Is my text safe when using this tool?
Yes. All processing happens entirely in your browser with JavaScript. Your text is never uploaded to any server, and nothing you enter is collected, stored, or transmitted.
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