Remove Look-Alike Characters from Text

When text passes through AI systems, OCR engines, PDF exports, or international keyboard inputs, look-alike Unicode characters from non-Latin scripts can be silently introduced. Code identifiers with Cyrillic letters compile but produce shadow variables; YAML keys with Greek omicrons fail to match; API responses with fullwidth digits break numeric parsing. Cleaning the text to pure ASCII resolves all of these issues.

What "Clean" replaces

• Cyrillic: А→A, В→B, С→C, Е→E, Н→H, О→O, Р→P, Т→T, Х→X, а→a, с→c, е→e, о→o, р→p, х→x, у→y, and more.
• Greek: Α→A, Β→B, Ε→E, Η→H, Ο→O, Ρ→P, Τ→T, Χ→X, ο→o, ρ→p, χ→x, ν→v, α→a, and more.
• Fullwidth: Ａ–Ｚ→A–Z, ａ–ｚ→a–z, ０–９→0–9.
• Mathematical bold/italic: 𝐀–𝐙→A–Z, 𝐚–𝐳→a–z, and italic capital variants.

How to remove look-alike characters

1. Open the Homoglyph Detector and paste the text you want to clean into the input area.
2. Click Analyze to see which characters are homoglyphs and what they will be replaced with.
3. Click Clean. The cleaned output appears below with all homoglyphs replaced by their ASCII equivalents. Click Copy to copy it to your clipboard.

Common use cases

• Sanitizing AI-generated code before committing — LLMs sometimes output Cyrillic letters in identifiers
• Cleaning OCR output from scanned Russian or Greek documents
• Normalizing user inputs before storing in a database or comparing against known values
• Verifying that copied crypto wallet addresses are pure ASCII before sending
• Auditing npm/PyPI package names for fullwidth substitution typosquatting

Related tools

• Homoglyph Detector — full detection with highlighted preview
• Detect Cyrillic Homoglyphs — Cyrillic-specific reference
• Compare Wallet Addresses — codepoint diff for addresses
• Invisible Character Detector — remove zero-width and BiDi characters
• Find & Replace — manual search-and-replace tool