Invisible Text Generator
Generate invisible Unicode characters for usernames, social bios, or blank messages. Also detects hidden chars in pasted text.
Generate
10 invisible character(s)
Detect hidden characters
Generated Length: 0Pasted Length: 0
What are invisible Unicode characters?
Invisible text uses Unicode code points that render as blank: the Hangul Filler (U+3164) takes up full-width space, while Zero-Width characters (U+200B–200D) take no visual space at all. They are often used for blank Discord/WhatsApp messages, spacer characters in usernames, or watermarking text. The detector scans pasted content for any of these characters and counts them.
Built and maintained by Meet Shah · Last updated
What this tool is used for
- Producing a zero-width character to test whether a validator strips it.
- Checking how a field handles characters with no visible width.
- Reproducing a bug caused by an invisible character in user input.
- Demonstrating why a name that looks empty can pass a length check.
- Producing input for a security review of a form's sanitisation.
Frequently Asked Questions
- Which characters are actually invisible?
- Zero-width space (U+200B), zero-width non-joiner (U+200C), zero-width joiner (U+200D), word joiner (U+2060) and the Hangul filler (U+3164) — the last of which many systems accept in usernames where a plain space is rejected.
- Is this the same as a blank space?
- No, and that is why it works where a space fails. A space is a visible character with width that most validators trim or reject; a zero-width character has no width and often passes the same validation untouched.
- Can invisible characters be used to hide data?
- Yes — zero-width steganography encodes bits as a sequence of these characters, and has been used to watermark and trace leaked documents. It survives copy-paste, which is exactly what makes it effective and worth detecting.
- How do I detect or remove them?
- Strip the Cf (format) category, or match the specific code points. This is worth doing on any pasted input — invisible characters in a password field or an API key produce failures nobody can see.
- Where do they legitimately belong?
- They have real typographic jobs: ZWNJ prevents ligatures in Persian and Arabic, ZWJ forms emoji sequences and Indic conjuncts, and ZWSP marks a permitted line-break point in a long unspaced string.
- Do invisible characters survive being sent through a system?
- Often, and that is the concern — many systems pass them through untouched into logs, databases and search indexes. Others strip them silently, which is why they are unreliable as a marker and useful as a leak.
- Do they count toward a character limit?
- Yes. Each is a real code point, so a message that looks short can exhaust a limit, and a field that appears empty can fail a required-field check by being non-empty.
Common errors and gotchas
- Using it to bypass a filter or a name policy, which is evasion rather than a technical exercise.
- Assuming it is harmless, when an invisible character breaks search, comparison and deduplication.
- Putting it in a username others then cannot type or find.
- Expecting it to survive normalisation, which strips most zero-width characters.
- Using it in content a screen reader must read, where the behaviour is unpredictable.
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