String Tools

Invert String Case

Use Invert String Case to work with your content in a fast and reliable way. Paste or type your input, adjust the available options, preview the result instantly, and then copy or download the final output. This online utility is part of a broader collection of developer‑friendly tools designed for everyday workflows.

Updated 2025-12-01

Invert Case

Swap case

Swap uppercase and lowercase characters.

Each uppercase letter becomes lowercase and vice versa. Non-alphabetic characters remain unchanged.

Related tools

String Analyzer

Planned

Inspect strings for length, unicode classes, and entropy

String Splitter

Live

Split by delimiter, regex, or fixed width

String Randomizer

Planned

Shuffle, rotate, and mutate strings safely

Invert String Case | String Tools