Invisible Char Remover
Invisible Char Remover — runs in your browser. Inputs are not stored.
Invisible character remover
Enter values, then press Calculate.
Removes zero-width (ZWSP etc.), BOM, bidi controls (LRE/RLO etc.), NBSP, narrow spaces, and other invisible or special spaces. Useful for cleaning AI watermarks.
How to use
- Paste text that pastes oddly or fails to search into the field.
- Press Remove.
- Check characters before, characters after, and the removed count.
- Review the cleaned result and take it with Copy result.
- For another sentence, press Reset.
Key concepts
Invisible character removal deletes characters you cannot see but that break search, parsing, or hashes—zero-width space (ZWSP), BOM, bidi controls (LRE/RLO and similar), NBSP, and narrow spaces. Use it to clean sentences copied from a chatbot or PDF, or watermark-like code points that hitchhiked from the web. Regular space (U+0020), newlines, and tabs are kept.
Visible Hangul, Latin, and digit body text is not deleted. The before/after character counts show how much was dropped. Processing runs only in the browser. It is not a universal filter for every Unicode control; it focuses on the families this tool lists. Visible special symbols are left as-is.
Example
If two words look the same but a zero-width sits between them, search fails. Paste and press Remove: the removed count is 1 or more and the after count drops. Paste that result back into an editor and find works again. A BOM-only file prefix also shows as a smaller character count. If paste into a search box still fails, filter once here for leftover zero-widths. In code review, if the same identifier fails to compare, suspect invisible characters first. A removed count of 0 can still leave other Unicode normalization issues, so NFC may still be needed. When retrying, reset first so old output is not mixed in. On a shared computer, clear the field when you finish. Closing the tab discards what you pasted; no server delete is needed. Labels match the tool at the top of the page.
Related: Remove duplicate lines · Unicode converter · Character counter
Frequently asked questions
Does invisible character removal also delete Hangul body text?
No. Visible ordinary letters and basic spaces/newlines are left as-is.
Can it remove AI text watermarks?
If zero-width families are mixed in, it can help clean them. It does not guarantee every watermark.
Are NBSP special spaces removed too?
NBSP and narrow spaces and similar special spaces are removed. Ordinary space remains.
Why remove bidi control characters?
They can flip display direction to disguise links or code, so they are removal targets.
Is text sent to a server?
No. Removal runs only in the browser.
Do tabs and newlines disappear too?
Tabs and ordinary newlines are kept. The behavior is meant to preserve layout line breaks.
Last reviewed: 2026-09-04