Herramientas Unicode
Herramientas Unicode gratis: convertidor de texto, secuencias de escape, búsqueda de puntos de código, inspector de caracteres, detector de confundibles y normalización. Todas sin conexión.
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Unicode is the universal character standard that assigns every character in every writing system a unique code point. Developers, designers, data analysts, and writers use these tools to inspect, convert, normalize, and debug text that behaves unexpectedly across platforms.
Whether you are searching for a specific symbol, converting fancy text back to plain ASCII, encoding characters for HTML or JSON, or fixing string comparison bugs caused by composed vs. decomposed characters, this toolkit handles the job in your browser with no upload required.
What Is Unicode and Why Does It Matter?
Unicode maps every character in the world to a unique number (a code point), preventing "Mojibake" — the garbled text that appears when bytes are decoded with the wrong character set.
Two strings can look identical and still contain different code-point sequences. Normalization, inspection, and confusable detection expose those differences so your comparisons, searches, and database queries work correctly.
Characters outside the Basic Multilingual Plane (like emoji) use surrogate pairs in UTF-16, meaning one visible character can occupy two JavaScript code units. A byte-order mark (BOM) can be useful at a file boundary but unwanted inside a string. Homoglyphs and invisible characters can make identifiers look trustworthy while remaining different at the code-point level.
The 5 Unicode Tools You Need
- Unicode Character Table - Search & Copy SymbolsSearch pasted characters by code point, decimal value, and UTF-8 bytes, then copy the result.
- Unicode to ASCII Converter - Strip Fancy TextTurn styled Unicode into plain ASCII where legacy systems, search, or database matching require it.
- Unicode to HTML Entities ConverterConvert characters to decimal or hexadecimal HTML entities for source code, email, and markup.
- Unicode Escape Sequence GeneratorConvert characters into \uXXXX or code-point escape sequences for JavaScript, JSON, and APIs.
- Unicode Normalizer - Fix String Comparison BugsNormalize text with NFC, NFD, NFKC, or NFKD before comparison, storage, and search.
Common Unicode Bugs and Quirks
Surrogate pairs: Characters outside the Basic Multilingual Plane (emoji, rare scripts) use two UTF-16 code units. This breaks naive length checks and substring operations in JavaScript.
Byte-order marks (BOM): A BOM at the start of a file signals encoding. A BOM inside a string is noise that breaks parsing and comparisons.
Identical-looking characters with different hex codes: "A" (U+0041), "Α" Greek capital alpha (U+0391), and "А" Cyrillic capital A (U+0410) render identically in many fonts but are distinct code points. This causes bugs in search, deduplication, and security.
Composed vs. decomposed: "é" can be one code point (U+00E9, NFC) or two — "e" + combining acute (U+0065 U+0301, NFD). They look the same but compare differently in code.
Preguntas frecuentes
What is the difference between UTF-8 and Unicode?
Unicode defines character identities (code points). UTF-8 is a variable-length byte encoding used to store and transmit those code points. Unicode is the "what"; UTF-8 is one "how".
Why do some emojis break my code?
Many emoji use multiple code points (sequences, variation selectors, skin-tone modifiers) or UTF-16 surrogate pairs. Counting graphemes (user-perceived characters) instead of code units or code points fixes most issues.
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