Text Tool

How to use

What it does

A set of high-frequency text operations: de-duplicate lines, diff two blocks line by line, reverse whole passages, count characters and word frequencies, change letter case, strip extra blank lines. Tidying data while coding, proofing what changed between two drafts of copy, or finding the most repeated words in a passage all happen here without opening an editor.

How to use it

Paste your text and choose an operation; the result appears in the output area immediately. Diff mode needs two input boxes and colours added and removed lines differently. Frequency mode sorts words from most to least common with a count beside each. Anything produced can be copied in one click.

FAQ

Is the text I paste uploaded to a server?

No - all nine modes (dedup, diff, conversion and the rest) run entirely in your browser. The page makes no network requests and nothing you paste is stored anywhere.

Why do some characters stay unchanged in simplified-traditional conversion?

The converter uses a built-in table of roughly 250 common characters only - anything outside the map passes through untouched. It is character-level, not dictionary-based, so double-check rare characters.