Hidden Character Remover finds invisible byte markers and zero-width spaces that break layouts or poison production database strings.
These code points show up most often in AI chat pastes, docs, and web copy. The full scan covers 60 characters; this table is the short list.
| Code | Name | Why it breaks pastes |
|---|---|---|
| U+200B | Zero Width Space | Invisible separator; breaks word counts, search and URLs. Common AI/copy artifact. |
| U+200C | Zero Width Non-Joiner | Invisible; controls ligature joining. Often unintended residue. |
| U+200D | Zero Width Joiner | Invisible; joins glyphs/emoji. Can be watermark residue in plain text. |
| U+FEFF | Zero Width No-Break Space (BOM) | Byte order mark / invisible; corrupts leading text and parsing. |
| U+00A0 | No-Break Space | Looks like a space but blocks line breaks; breaks search matching. |
| U+202F | Narrow No-Break Space (NNBSP) | The main 'ChatGPT o3/o4-mini' artifact. Looks like a space, different code point. |
| U+00AD | Soft Hyphen | Invisible unless line wraps; splits words for search. |
| U+202E | Right-To-Left Override | Bidi override; strong spoofing risk. |
The live scanner still checks the full set of 60 code points, including bidi controls and variation selectors.
See it in action
Inspect invisible Unicode characters, control bytes, and clipboard residue that create hidden formatting bugs.
Sure! Here’s a summary — **Key points** - First item > Note: important
Sure! Here's a summary — Key points • First item Note: important
Why
Hidden Character Remover finds invisible byte markers and zero-width spaces that break layouts or poison production database strings.
Non-printing byte sequences such as zero-width spaces (U+200B), byte-order marks (U+FEFF), narrow no-break spaces (U+202F), and soft hyphens. These are deterministic characters that can be completely detected and removed in your browser without altering visible words.
Algorithmic token distribution and repetitive sentence patterns introduced by AI models during text generation. Because statistical watermarks alter word selection rather than inserting hidden characters, removing them requires semantic restructuring via our Pro rewrite engine.
Invisible-character and Markdown cleaning run locally in your browser. We don’t store Free-tool text.
How
Paste your text into the workspace to begin the scan. The browser engine immediately cross-references the text against 60 invisible Unicode code points and highlights any detected artifacts.
Review the highlighted code points, including any zero-width or narrow spaces. Click Clean to strip every invisible character instantly with zero server latency and complete privacy.
Copy your clean text for publishing, database storage, or coding. If your draft also requires vocabulary refinement or tone adjustment, you can optionally send it to our Pro rewrite engine.
Features
Detects zero-width spaces, NNBSP, BOM, directional marks and 60+ other invisible code points without rewriting your words.
Strip headings, lists, quotes, and emphasis markers into plain text ready for CMS and editorial review.
Pro rewrite regenerates meaning-preserving text when a watermark is baked into wording — not just hidden Unicode.
Rewrite AI flavor into more natural cadence. No tool can guarantee detector bypass; results vary.
Definition
Production layouts crack when a zero-width space sits in a title, a slug, or a SKU. This page is that firefight: detect and eliminate the markers locally.
Backend corruption looks like “the string is longer than it looks.” Hidden characters are the usual cause. Official sampling watermarks are not.
We do not score whether the copy is AI. The list is glyphs. Free scan cannot remove Claude’s official sampling watermark.
Fix the layout, then decide if you even want a rewrite. Most rendering bugs die on the free pass.
Sources
Hidden Unicode, Markdown residue, and Claude’s official statistical watermark are three mechanisms. This page cites the public specs; it does not claim detector bypass.
| Mechanism | What it is | What this site does |
|---|---|---|
| Invisible Unicode | Zero-width and format code points (including U+200B and U+202F) that can ride along in a paste. | Free local scan and delete. Does not rewrite sentences. |
| Markdown / rich-text residue | Hashes, fences, emphasis markers, and copied rich-text spacing. | Free local strip to plain text. |
| Statistical wording watermark | A sampling pattern in word choice. Official Claude text watermarks add no hidden characters. | Pro meaning-preserving rewrite. Not a detector score, not a guarantee. |
“Nothing is added to the text and there are no hidden characters.”
“U+200B ZERO WIDTH SPACE is intended for line break control without displaying a visible space.”
Markdown tokens follow the CommonMark specification: CommonMark spec.
Use cases
Fix the layout, then decide if you even want a rewrite. Most rendering bugs die on the free pass.
Open the tool →
Backend corruption looks like “the string is longer than it looks.” Hidden characters are the usual cause. Official sampling watermarks are not.
Open the tool →
Invisible byte markers and zero-width spaces that shift wrapping, break CSS, or make two strings look equal and compare unequal.
Open the tool →
Same tab, singular “hidden character remover” wording aimed at layout and production strings.
Open the tool →Testimonials
“The free scan lists the code points. I clean the paste in the browser, then only use Pro if the wording itself needs a rewrite.”
Content ops
SEO & CMS
“Markdown from chat was breaking our editor. Stripping hashes and fences locally is the whole job — no file upload.”
Editorial
Publishing
“Hidden Unicode broke string equality in a parser. Character cleanup first; sentence rewrite is a different layer.”
Engineering
Docs & support
Tools
Dedicated landing pages for the searches people actually type.
Scan and purge 60 invisible Unicode code points, zero-width spaces, and non-printing control characters directly in your browser.
Remove Hidden Characters →Strip 60 invisible Unicode characters, zero-width spaces, narrow non-breaking spaces, and hidden control marks from pasted text 100% locally in your browser.
Invisible Character Remover →Locate and remove U+200B zero-width spaces, ZWNJ, ZWJ, and invisible delimiters from text locally in your browser.
Zero-Width Space Remover →Pricing
Scanning and removing 60 hidden Unicode characters is always free in your browser, with Pro rewrite credits available on our pricing page.
See pricingOur free tool provides detection and removal of 60 verifiable Unicode code points directly in your browser. However, removing invisible characters does not eliminate statistical AI model watermarks, nor does it guarantee evasion of AI detectors such as Turnitin, GPTZero, or Copyleaks. In addition, this tool is designed for pasted text and does not process uploaded Word (.docx) or Pages files.
FAQ
Invisible byte markers and zero-width spaces that shift wrapping, break CSS, or make two strings look equal and compare unequal.
Yes. Unique indexes and length checks fail when U+200B is in the stored value. Strip locally before insert.
No. It is not a probability score. It lists hidden characters.
No. Free scan cannot remove Claude’s official sampling watermark.
No. The hidden-character pass is free in the browser.
Same tab, singular “hidden character remover” wording aimed at layout and production strings.
About us
Fix the layout, then decide if you even want a rewrite. Most rendering bugs die on the free pass.
Hidden Character Remover finds invisible byte markers and zero-width spaces that break layouts or poison production database strings.