Non-ASCII Character Finder

Non-ASCII characters are any characters with a code point above 127 (0x7F) in the Unicode standard. While ASCII covers basic English letters, digits, and common punctuation (U+0000 to U+007F), non-ASCII characters include everything else - accented Latin letters (é, ñ, ü), currency symbols (€, ¥, £), CJK characters (汉字), Cyrillic (Привет), Arabic (مرحبا), emoji (🚀, ❤️), mathematical symbols (∑, ∞, π), invisible control characters (zero-width space, right-to-left mark), and thousands more from over 150 modern and historic scripts. Our non-ASCII character finder scans your text for any character outside the basic ASCII range, showing you exactly where each non-ASCII character appears, its Unicode code point (U+XXXX format), its official Unicode name, and its character category. This is essential for debugging encoding issues, ensuring proper text rendering, and validating that your content uses the correct Unicode characters for your target language and platform.

1. 1. Enter your text: Type or paste text directly into the input area, or click "Upload File" to load a .txt file. The non-ASCII character finder scans your text instantly as you type or paste - no button clicking required for basic analysis.
2. 2. Review found characters: Every non-ASCII character is listed in a results table showing the character itself, its Unicode number (U+XXXX), its official Unicode name, category (Letter, Symbol, Mark, etc.), and its position (character index) in the text. Characters are grouped by category for easier browsing.
3. 3. Examine the highlighted text: The text preview panel shows your input with all non-ASCII characters highlighted in color - each character is clearly marked so you can see exactly where they appear in context. Hover over any highlighted character to see its details.

• Accented & Extended Latin: Characters like é, ñ, ü, ø, å, ç, ð, þ, and other Latin-based letters with diacritical marks used in European languages (French, Spanish, German, Danish, Icelandic, etc.) are detected. These are common sources of encoding problems in legacy systems.
• Non-Latin Scripts: All characters from non-Latin writing systems are detected - Cyrillic (Russian, Ukrainian), Greek, Arabic, Hebrew, Devanagari (Hindi), CJK (Chinese, Japanese, Korean), Thai, and hundreds more scripts supported by Unicode.
• Symbols & Punctuation: Non-ASCII symbols like mathematical operators (∑, ∞, ∂), currency symbols (€, ¥, ₹, ₽), typographic quotes (" "), dashes (-, -), bullet points (•), arrows (→, ⇒), and other special punctuation are all identified with their Unicode names and positions.
• Invisible & Control Characters: Zero-width spaces, zero-width joiners, left-to-right/right-to-left marks, soft hyphens, non-breaking spaces, byte order marks (BOM), and other invisible Unicode characters are detected and highlighted. These are particularly important for debugging mysterious layout and parsing issues.

Our non-ASCII character finder processes all text entirely in your browser using standard JavaScript string operations. No text is ever uploaded to any server - every character stays on your device. There are no file size limits, no signup requirements, and no usage caps. The tool scans character-by-character using JavaScript\'s built-in charCodeAt() and codePointAt() methods, which correctly handle Unicode characters outside the Basic Multilingual Plane (BMP), including emoji and rare CJK characters. Note that the tool identifies characters by their code point value - it does not perform encoding conversion or attempt to validate whether text is in any specific encoding. For encoding-specific validation, use a dedicated encoding detection tool alongside this character finder.