What counts as a consonant here?

Any cased letter that is not a vowel. The vowels kept are a, e, i, o, and u, plus optionally y. Everything else in the alphabet is treated as a consonant and removed.

Why are spaces and numbers kept?

Only consonant letters are stripped. Spaces, digits, and punctuation are not letters, so they pass through unchanged and the gaps between words remain visible.

How is this different from a vowel remover?

It is the exact opposite. A vowel remover deletes vowels and keeps consonants; this tool deletes consonants and keeps vowels. Run both on the same text and the kept characters are complementary.

Is the operation reversible?

No. The removed consonants are discarded, so the original text cannot be reconstructed from the output alone. Keep a copy of your source text if you need it back.

Consonant Remover — Gera Tools

A consonant remover keeps only the vowels in a piece of text and discards every consonant. It is the mirror image of a vowel remover and is useful for word games, phonetic experiments, and showing how little structure remains when only vowels survive.

How it works

The tool inspects each character and decides whether it is a cased letter by comparing its uppercase and lowercase forms. If it is a letter, it is kept only when it is a vowel:

vowels = "aeiou"   (or "aeiouy" if y is treated as a vowel)
for each char:
    if char is a letter:
        keep only if char.toLowerCase() is in vowels
    else:
        keep it  (space, digit, punctuation)

Non-letters always survive, so word spacing and punctuation are preserved while the consonant skeleton disappears.

Example and notes

The sentence The quick brown fox becomes e ui o o (with the original spaces kept). Treating y as a vowel changes Why from empty to y. Because consonants are thrown away, the transformation cannot be undone, so save your input if you need the full text later.