About

Strip Invisible is a handful of small browser tools for one job: finding and removing characters you cannot see.

Why it exists

Invisible characters survive copy and paste. They ride along from a chat window into a code editor, a spreadsheet column, a JSON payload or a document, and then something breaks — a parser refuses the file, a lookup returns nothing, a piece of text gets flagged as carrying an AI watermark. The character is still there, it just does not show up on screen. Every tool on this site is a different answer to the same problem: make the invisible visible, then take it out.

What is on the site

• Claude watermark remover — the front page. Strips the zero-width characters associated with Claude output and shows you where they were.
• Zero-width space remover — the same job as a standalone page, with the positions marked.
• JSON cleaner — for a payload that will not parse because of something you cannot see.
• Excel cell cleaner — for a spreadsheet column where lookups silently fail.
• Word and Docs cleaner — for text pasted out of a document.
• Text compare — puts two versions side by side and shows what differs, including the parts that differ invisibly.
• Invisible characters list — the reference: which characters exist, their code points, and where they come from.

How the tools run

Entirely in your browser. There is no upload step, no account, and no server processing your text — the tool scripts contain no network requests at all, so the text you paste in has nowhere to go. Close the tab and it is gone. That is also why the character tables work offline once the page has loaded.

How the site pays for itself

Through advertising, eventually. Hosting is not free and neither is the domain, and the alternative to ads is a paywall on something that takes one click to use. The privacy page carries the current list of advertising partners, and today that list reads none — it gets updated the moment a network is actually live on the site, not before. Ads will not be given access to anything you type into a tool.

What this site is not

• Not an API and not a browser extension. There is no programmatic interface yet.
• Not a service that remembers you. No accounts, no saved history, nothing written to your browser's storage.
• Not a general-purpose formatter. These tools remove invisible characters; they do not rewrite, translate or proofread your text.
• Not a claim about who wrote a piece of text. Removing a watermark character tells you the character was there. It does not tell you anything about how the text was produced.

If something here is wrong

That is worth an email. A character the tools miss, a tool that misbehaves, or a sentence on this site that is out of date — all of it is a bug, and the address is on the contact page.

Strip Invisible is built and maintained by Nullwidth.