Invisible Character Detector

Detect and remove invisible, hidden, and zero-width characters in text

Invisible Character Detector

Enter or Paste Text to Analyze Paste text and click Analyze to find hidden characters

Statistics

Total Characters

Invisible Found

Types Found

Clean Length

All processing happens in your browser. No data is sent to any server.

Usage Examples

Zero-Width Spaces

Detect zero-width spaces that can cause issues in code, URLs, and text comparisons.

Non-Breaking Spaces

Find non-breaking spaces and soft hyphens hidden in text copied from websites or documents.

BOM & Control Characters

Detect BOM characters and various Unicode control characters that can break code and data files.

Features

Deep Detection

Detects 30+ types of invisible Unicode characters including zero-width spaces, joiners, marks, and control characters

Visual Highlighting

Shows invisible characters with visible markers in the preview, making them easy to locate

One-Click Cleaning

Remove all invisible characters instantly with a single click and copy the cleaned text

Privacy First

All processing happens locally in your browser, no data sent to servers

How to Use?

Paste Your Text

Paste the text you want to analyze into the input area. It can be from any source: websites, documents, code, etc.

Analyze

Click Analyze to detect invisible characters. View the results table showing each type, count, and positions.

Clean and Copy

Click "Remove All" to strip invisible characters, or "Copy Clean Text" to copy the cleaned version.

Frequently Asked Questions

Invisible characters are Unicode code points that take up space in a string but produce no visible glyph. Common types include: Zero-Width Space (U+200B), Zero-Width Non-Joiner (U+200C), Zero-Width Joiner (U+200D), Byte Order Mark/BOM (U+FEFF), Soft Hyphen (U+00AD), Word Joiner (U+2060), and various other control characters. They commonly appear in text copied from websites, PDFs, Word documents, or chat apps.

Paste your text into the input field and click Analyze. The tool scans for 30+ types of invisible Unicode characters, highlights their exact positions in the text, identifies the Unicode code point (e.g., U+200B), and gives you a count by type. Each detected character is shown inline so you can see exactly where it is hiding.

Yes, in multiple ways. A zero-width space inside a variable name or string literal causes a syntax error or undefined variable. String comparison fails when two visually identical strings differ by a hidden character. URLs break when a zero-width space is embedded. JSON parsing fails if invisible chars appear in keys or values. These bugs are nearly impossible to spot by eye — only a detector reveals them.

The most common sources: copying text from websites (CMS editors often insert zero-width spaces), PDFs (especially scanned/OCR documents), Microsoft Word or Google Docs, chat applications like Slack or WhatsApp, code copied from Stack Overflow or Medium, and AI-generated text (some models insert non-standard whitespace). The BOM character often comes from UTF-8 files saved on Windows.

After analyzing, click the "Remove All" button to strip all detected invisible characters from your text. The cleaned text appears in the output area for copying. You can also remove specific types only — for example, keeping soft hyphens while removing zero-width spaces.

Zero-Width Space (ZWSP, U+200B) is the most commonly encountered invisible character. It was originally designed to indicate word-wrap opportunities in languages that do not use spaces between words. It is frequently inserted accidentally by rich text editors and CMS platforms. In code, it can corrupt variable names, string comparisons, and API calls.

A BOM (U+FEFF) is a hidden marker that indicates UTF-8 encoding in some files. While harmless in documents, it causes problems when it appears at the start of a JSON file (breaks JSON.parse()), a PHP file (produces unexpected output before headers), or a CSV file (breaks column headers in Excel parsing). This tool detects BOM characters and lets you remove them.

No. All analysis runs locally in your browser using JavaScript. Your text is never transmitted, stored, or logged. Sensitive content (passwords, source code, private documents) is safe to analyze here.

What Are Invisible Characters?

You know that frustrating moment when two strings look identical but your code says they are not equal? Chances are there is an invisible Unicode character hiding in there. Zero-width spaces, byte order marks, soft hyphens -- these sneaky characters are everywhere, and you cannot see them without the right tool.

How This Detector Helps

Paste your text and hit Analyze. The tool scans for 30+ types of invisible characters, highlights exactly where they are hiding, and shows you the Unicode code point for each one. You get a clear breakdown by type with exact positions -- no more guessing.

Common Scenarios

Copied text from a website and your layout looks off? Pasted a URL that does not work even though it looks correct? Database entries that refuse to match? These are classic invisible character problems. Developers, content editors, and QA teams run into this constantly.

Clean Your Text in One Click

Once you spot the hidden characters, click Remove All to strip them out instantly. Copy the cleaned text and get back to work. No plugins to install, no registration required -- just paste, scan, and clean.

Why Not Just Use a Regex?

You could write a regex to catch some invisible characters, but there are over 30 different types across various Unicode ranges. This tool handles all of them automatically, including obscure ones like right-to-left marks, word joiners, and variation selectors that most regex patterns miss.

Privacy and Security

Your text stays in your browser. Nothing is uploaded, stored, or logged. This is especially important if you are working with sensitive content like source code, API keys, or private documents.

Security and Privacy

Your data security is our priority

Local Processing

All processing happens in your browser

No Data Transfer

Your data is not sent to our servers

No Data Storage

No data is stored or shared

SSL Encryption

SSL encryption for secure connection

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Invisible Character Detector