Convert any text string to UTF‑16 hexadecimal or decimal representation. Bulk processing, real-time validation, CSV export. 100% client‑side.
Click or drag .txt file (up to 2MB) — one string per line
Convert hundreds of lines instantly; real-time validation detects malformed input.
Download results as structured CSV (Original, UTF-16 Encoded) for spreadsheets.
Accurate UTF‑16 encoding (surrogate pairs supported: emojis, CJK, etc).
All conversions happen locally in your browser – zero server logs.
Paste single or multiple strings, each on new line.
Choose HEX or decimal UTF-16 representation.
Click convert — see UTF‑16 codes instantly.
Copy all results or download CSV for integration.
UTF-8 and UTF-16 are the most prevalent Unicode character encodings used across the web, databases, and software applications. Converting UTF-8 text to UTF-16 is essential when dealing with Windows environments, Java programs, or certain APIs that require 16-bit encoding. This free tool transforms any UTF-8 string into a UTF-16 sequence — either as human‑readable hexadecimal values or decimal code points. For example, the character "A" (U+0041) in UTF-8 is a single byte (0x41), but in UTF‑16 BE/LE it appears as "0041". Emojis like "😊" are represented using surrogate pairs (high and low surrogates) such as D83D DE0A in hex.
Why convert UTF-8 to UTF-16? Many legacy systems, embedded devices, and text protocols require fixed-width 16-bit encoding for consistent character indexing. Also, when dealing with JavaScript internal strings (UTF‑16 code units), this converter gives insight into how strings are stored. Our bulk converter handles hundreds of lines — ideal for localisation files, data migration, or debugging character encoding mismatches. Simply paste mixed content: “Café”, “東京”, “Python 🐍”, and instantly view their UTF‑16 representation. Real‑time validation flags empty lines or problematic inputs, ensuring error-free conversion.
How to use this tool effectively? Type or paste text in the input area (one phrase per line for bulk). Choose between "UTF-16 Hex" (e.g., 0068 0065 006C 006C 006F) or "Decimal" (e.g., 104 101 108 108 111). Press Convert – the result displays alongside line statistics. You can upload a .txt file containing thousands of strings; output can be copied to clipboard or downloaded as CSV. Perfect for developers, testers, and data scientists who need to transform encoding for legacy integration. The converter respects surrogate pairs and works with all Unicode planes. No internet required after load, privacy guaranteed.
Pro tip: Use the Bulk CSV download to map original strings to UTF-16 codes, then import into Excel or databases for analysis. This tool also helps in understanding UTF‑16 length vs UTF‑8 length. Start converting now — boost your Unicode workflow.