Replace lowercase consonants with uppercase

This tool replaces lowercase consonants with uppercase. It provides flexible options so you can replace every lowercase consonant, replace only those you specify, replace all except allowed ones, or apply a custom format. Simply enter your text and select the processing mode that suits your needs.

Input

Output

Processing Modes:

Replace All Lowercase Consonants
Converts every lowercase consonant (letters excluding a, e, i, o, u) to uppercase.

Replace Only Specified Consonants
Converts only the lowercase consonants you specify. Enter a comma‑separated list (e.g., l, r).

Replace All Except Allowed Consonants
Converts every lowercase consonant except those allowed (e.g., allowing r to remain unchanged). Enter a comma‑separated list (e.g., n, m).

Replace Consonants with Custom Format
Replaces every lowercase consonant with a custom formatted version. Use {char} as a placeholder for the uppercase consonant (e.g., [{char}]).

Examples:

Replace All Lowercase Consonants

Every lowercase consonant is converted to uppercase.

Before:

hello world!

After:

HeLLo WorLD!

Replace Only Specified Consonants

Only the specified lowercase consonants (e.g., l, r) are converted to uppercase.

Before:

hello world!

After (replacing l, r):

heLLo woRld!

Replace All Except Allowed Consonants

Converts every lowercase consonant except those allowed (e.g., allowing r to remain unchanged).

Before:

hello world!

After (allowing r):

HeLLo woRLD!

Replace Consonants with Custom Format

Each lowercase consonant is replaced using a custom format (e.g., wrapping in square brackets).

Before:

hello world!

After (format "[{char}]"):

[H]e[L][L]o [W]o[R][L][D]!