What is a zero-width space?

U+200B — a character that occupies zero horizontal space when rendered but counts as a non-empty string. The original "invisible character" for systems that demand a value.

Will this work on Discord/WhatsApp/Twitter?

Discord still accepts most ZW characters; many social platforms now strip them. Test on the target platform before relying on it.

Is using invisible characters a security risk?

It can be — they're sometimes used to obfuscate URLs or impersonate usernames. Use sparingly and only for legitimate UX reasons.

How do I copy an invisible character?

The tool's copy button puts the chosen character on your clipboard. You can't see it after pasting, but it's there.

What about hangul filler?

U+3164 — historically a Korean placeholder, often used because many platforms whitelist Korean blocks even when they block ZW spaces.

Invisible Char Detector

Find zero-width and hidden Unicode characters

AI & Text

Invisible Char Detector

Find zero-width and hidden Unicode characters

Paste text to scan

Total chars

UTF-8 bytes

Hidden chars

About this tool

Detects invisible Unicode characters that get pasted along with text — zero-width spaces, soft hyphens, BOMs, bidirectional overrides, tag characters, and non-breaking spaces. Often used in plagiarism cheats, prompt injection attacks, and accidental copy-paste from PDFs or LaTeX. Each detection shows position and Unicode code point, and a cleaned copy is one click away.

Formula

Detected ranges:

U+200B–U+200D (zero-width spaces, ZWNJ, ZWJ)

U+FEFF (BOM), U+00AD (soft hyphen)

U+2060 (word joiner), U+180E (mongolian vowel separator)

U+202A–U+202E, U+2066–U+2069 (bidirectional controls)

U+E0020–U+E007F (Unicode tag characters)

U+00A0 (non-breaking space, replaced with regular space)

How to use

1 Paste text into the textarea.
2 The counter on the right turns red if hidden characters are present.
3 A table lists every hidden character, its position, and Unicode code point.
4 Click 'Copy clean text' to get the same text with all hidden chars removed.

Frequently asked questions

PDFs often inject soft hyphens, zero-width spaces, and non-breaking spaces around line breaks. They are invisible but break grep, regex, search-and-replace and word counts.

They can be used for plagiarism (to defeat similarity checkers), watermarking text, prompt injection in AI inputs, and homograph-like attacks. Most legitimate text does not need them.

Yes. Cleaning only removes the documented invisible code points listed above. Emoji, accented characters, and multi-byte glyphs are preserved.

They are replaced with regular spaces, since they look identical but break word-wrapping and word-by-word parsing.

Related tools

Text Tools

Case, count, slugify, escape

Reverse Text

Mirror, flip, or upside-down text

Regex Tester

Test patterns + cheatsheet

Lorem Ipsum

Filler text — words / sentences / paragraphs

Embed this tool on your site

Drop a one-line iframe snippet into any blog, lesson plan, or knowledge base. Powered-by-Toolenza link included.

Embed this tool

Paste this snippet into any HTML page. The tool runs entirely in your reader's browser.

<iframe src="https://toolenza.codenzia.com/tools/invisible-char" width="100%" height="600" frameborder="0" loading="lazy" allow="clipboard-write" style="border:0;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,.08);"></iframe>

Preview embed →

Share Twitter / X LinkedIn Reddit WhatsApp Email

Invisible Char Detector

No reviews yet — be the first to share your thoughts.

Your rating

Your name

Email (Used only for moderator follow-up — never shown publicly.)

Your review Optional. If you write a comment it must be between 15 and 2000 characters.

No reviews yet — be the first to share your thoughts.