Free Invisible Character & Zero-Width Space Detector Online
Detect and highlight invisible characters, zero-width spaces (ZWSP), non-breaking spaces (NBSP), and rogue Unicode control characters in text and code. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Paste Text or Code
Paste text suspected of containing hidden characters.
Scan for Invisible Glyphs
Highlights zero-width characters in prominent visual warning badges.
Strip & Clean
Remove all invisible characters with one click.
Frequently Asked Questions
Related Text & Writing Calculators & Utilities
Interlinked precision tools in the Text & Writing collection.
Whitespace Remover & Text Cleaner
Remove extra spaces, tabs, leading/trailing whitespace, empty lines, and non-printing characters from text. Clean up OCR output, copied PDFs, and messy text.
Remove Empty & Blank Lines Tool
Strip empty lines, extra carriage returns, and blank spaces from text lists, database exports, code blocks, and CSV files.
Word & Character Counter
Count words, characters (with and without spaces), sentences, paragraphs, reading time, and keyword density. Supports Twitter, Instagram, and LinkedIn limit checks.
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE with one click.
Remove Duplicate Lines
Remove duplicate lines from any text list, optionally ignoring case, trimming whitespace, and sorting alphabetically. Shows count of duplicates removed.
Text Repeater
Repeat any text or character a specified number of times with custom separator (newline, comma, space) for generating test data, patterns, and lorem ipsum.