Hide Vowels — Replace Every Vowel with an Asterisk
Replace every vowel in your text with an asterisk instantly — create fill-in-the-blank puzzles and word games. Free, client-side vowel hider tool.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Input
Mystery Novel Output
Myst*ry N*v*l y is left visible, so the word shape stays recognisable — only a, e, i, o and u are masked.
Common Use Cases
Making fill-in-the-blank exercises
Mask vowels to build vocabulary and spelling worksheets where the word shape stays recognisable, so a learner keeps just enough scaffolding to reconstruct the answer unaided.
Word-guessing games
Generate hangman-style prompts for parties and classrooms in a single paste, instead of retyping every word with the blanks placed by hand in the right positions.
Sharing a partial answer
Post a puzzle solution with the vowels hidden so readers can check whether they were right, without the answer being readable at a glance further up the thread.
Teaching vowel recognition
Show a class which letters carry the vowel sounds by removing exactly those and leaving everything else, which makes the pattern visible across a whole passage at once.
Frequently Asked Questions
- What does the output look like?
- Every a, e, i, o and u — upper or lower case — becomes an asterisk, and everything else stays exactly where it was. "Hello World" turns into "H*ll* W*rld". Consonants, digits, spacing and punctuation are untouched, so line breaks and word lengths survive intact. Accented vowels such as é stay visible, since only the plain ASCII five are matched.
- Is y treated as a vowel here?
- No. Only the five classic vowels are masked, so y always stays visible. That is why "Mystery Novel" becomes "Myst*ry N*v*l" with both y characters intact, and why a word built entirely from y and consonants — "syzygy" — comes back completely unchanged, with nothing to fill in at all.
- Can I use a character other than an asterisk?
- Not from this tool — the mask character is fixed. If a worksheet template needs underscores or dots instead, run the text through here first and then do a find-and-replace on the asterisks in your editor. That takes one extra step and keeps every masked position exactly where it was.
- How is this different from removing the vowels entirely?
- Masking preserves length and spacing, so each hidden letter still occupies a slot and the word shape survives — which is precisely what makes a puzzle solvable. Remove Vowels deletes them outright, collapsing "Hello" to "Hll", which suits compression-style puzzles rather than fill-in-the-blank exercises.
- Is this a secure way to hide text?
- No, and it should never be used as one. Masking vowels is trivially reversible by anyone who can read the surrounding letters, and it is not encryption in any sense of the word. For anything that genuinely needs protecting, use a real one-way function such as the Hash Generator instead.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.