Remove Invisible Characters from AI Text
Find supported hidden Unicode characters, see their code point and location, then remove only the categories you select. Processing stays in your browser.
Free · No signup · Runs in your browser
Reveal and Remove Hidden Unicode
This page exposes only hidden-character and non-breaking-space rules. Run it once to inspect the code points, then review each removal before copying.
Characters This Tool Detects
The detector is deliberately finite and testable. It does not label ordinary multilingual letters as suspicious merely because they are non-ASCII.
Zero-Width Characters
U+200B ZERO WIDTH SPACE, U+200C ZERO WIDTH NON-JOINER, and U+200D ZERO WIDTH JOINER are reported by name. Joiners can be meaningful in some scripts, so review multilingual text before removal.
Word Joiner and BOM
U+2060 WORD JOINER and U+FEFF ZERO WIDTH NO-BREAK SPACE can survive copying even though they occupy no visible width.
Direction Marks and Controls
Direction marks and supported C0/C1 controls are shown with their source range. Line feeds and tabs are not silently classified as hidden characters.
Non-Breaking Space
U+00A0 looks like a normal space but affects wrapping and search. It has a separate switch because replacement, rather than deletion, is normally appropriate.
Why Hidden Unicode Breaks Search and Code
Two strings can look the same on screen and still contain different code points. Exact matching, identifiers, validation, and wrapping operate on those underlying values.
Search and replacement
A hidden value inside a word can prevent a literal search, deduplication check, or database comparison from matching.
Code and structured data
Unexpected controls can invalidate identifiers or produce confusing diffs. Always validate code and JSON with the destination parser after cleanup.
Copy-and-paste layout
Non-breaking spaces may prevent expected wrapping, while direction controls can alter how adjacent characters are displayed.
Safe and Destructive Boundaries
Removal is deterministic but not universally harmless. Zero-width joiners and direction marks can be intentional in multilingual or bidirectional text. The tool reports what it found instead of promising that every invisible character is an AI watermark. It cannot detect statistical watermarking, prove authorship, or guarantee a detector result.
Inspect before copying
Use the source range, Unicode name, and before/after output to decide whether a removal fits the document.
Preserve meaningful script behavior
Do not remove joiners or direction marks blindly from text whose shaping or reading order depends on them.
Use spacing rules separately
For tabs, repeated spaces, blank lines, and trailing whitespace, use the focused spacing tool.
Related tools, guides, and evidence
Maintenance and review
Maintained by the site owner. Supported code points and risks were last checked against local formatting engine version 1 on September 5, 2026.
Evidence source
Executable fixtures cover every Unicode row published in the guide.
Correction policy
Coverage changes require tests, methodology, and page copy to change together.
Review scope
Character detection only; presence never establishes authorship.