This page finds U+00A0 NO-BREAK SPACE and converts each one to a regular space. The sample below contains several — hover the orange dots in the x-ray. Everything runs in your browser — nothing is uploaded.
A space that looks identical to a normal space but tells layout engines "don't wrap the line here". It's the character behind HTML's . Visually indistinguishable from U+0020 — and to every parser, completely different.
Copying from web pages (any becomes U+00A0 on your clipboard), Word and Google Docs (inserted automatically around some punctuation), Excel and Google Sheets exports, and French-style typography which puts one before : ; ! ?.
Pasted shell commands fail with command not found because the shell sees apt install as one giant argument. Python reports SyntaxError: invalid non-printable character U+00A0. CSV columns won't line up, spreadsheet VLOOKUP/MATCH can't find values that are visibly there, and search-and-replace on a normal space misses every one of them.
In VS Code, regex-search \u00a0. On the command line: grep -rP '\x{00A0}' . — or paste the text above: every exotic space is marked with a dot and converted to a plain space in the output.
Guides for the common cleanup jobs — what the source puts into your text, exactly what it breaks, and the tool preloaded with a demonstration:
AI-generated text · Text copied from Word / Google Docs · Text copied from a PDF · Pasted code that won’t run · CSV & spreadsheet data · Invisible watermarks · Many files at once (batch)
Dedicated pages for the usual suspects — what each one is, where it sneaks in from, the exact errors it causes, and how to find it in your editor:
Zero-width space (U+200B) · Non-breaking space (U+00A0) · Byte order mark (BOM) (U+FEFF) · Soft hyphen (U+00AD) · Smart quotes · Em dash (U+2014) · Narrow no-break space (U+202F) · Ideographic space (U+3000) · Zero-width joiner (U+200D) · Zero-width non-joiner (U+200C) · Word joiner (U+2060) · Right-to-left override (U+202E) · Left-to-right mark (U+200E) · Line separator (U+2028) · Variation selector-16 (U+FE0F) · Object replacement character (U+FFFC) · Hangul filler (U+3164) · Braille pattern blank (U+2800) · Ligatures · Minus sign (U+2212)
Страницы на русском — те же инструменты с переведёнными правилами и примерами под задачу:
Невидимые символы в тексте · Убрать невидимые символы · Почистить текст нейросети · Неразрывные пробелы в числах · Текст из Word · Код не запускается