UTF8 Encoder/Decoder

A simple online UTF8 encoder and decoder, for developers and programmers. Simply copy and paste your text in the form field below and see the UTF-8 data on the right.

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Browser Extensions

iPhone/iPad App

Android App

UTF-8 Encoder and Decoder

UTF-8 is the dominant character encoding on the web, capable of representing every character in the Unicode standard. Our free online UTF-8 Encoder and Decoder lets developers and content creators convert plain text into its UTF-8 byte representation and reverse the process just as easily. Use it for debugging encoding issues, validating input data, inspecting byte sequences, or preparing text for systems that require explicit UTF-8 formatting.

What is UTF-8?

UTF-8 stands for "Unicode Transformation Format - 8-bit." It's a variable-width encoding system for Unicode characters, which means it can represent every character in the Unicode standard. UTF-8 is widely used because it's compatible with ASCII and can accommodate a variety of characters from different languages and symbols, all within a single encoding scheme.

In UTF-8, individual characters may use between 1 and 4 bytes. ASCII characters, like basic Latin letters and numbers, only use one byte in UTF-8, making it efficient for English and other languages that primarily use the Latin alphabet. UTF-8 is commonly used in web development, data storage, and any context where text needs to be manipulated or transmitted. Its flexibility and compatibility make it a popular choice for encoding text.

What are common use cases for UTF-8 encoding and decoding?

UTF-8 encoding and decoding is useful in several practical scenarios. Developers frequently use it for browser testing to see how different characters are handled, identifying weak input validation that could allow security bypasses, and inspecting the actual bytes behind a given string. It is also valuable when migrating data between systems that use different encodings, debugging garbled text in APIs or databases, and ensuring multilingual content displays correctly across platforms. If you work with web forms, file uploads, or internationalized applications, understanding the UTF-8 byte output of your data helps you catch encoding mismatches before they reach production.