Test a regular expression: every match with its groups and positions, plus replace.
Optional. Use \1 or \g<name> for groups.
Every case at once: camelCase, snake_case, kebab-case, Title Case and more.
Turn titles into clean URL slugs, one per line.
Words, characters, sentences, reading time and the most frequent words.
Compare two texts: a unified diff plus added, removed and changed line counts.
Fibonacci ToolBox runs its tools from your browser session and needs JavaScript.