Text Encoder Decoder

JavaScript (Browser)

const encoder = new TextEncoder();
const bytes = encoder.encode("Hello");
// Uint8Array [72, 101, 108, 108, 111]

const hex = [...bytes].map(b => b.toString(16).padStart(2, '0')).join(' ');
// "48 65 6c 6c 6f"

Python

# UTF-8 to hex
text = "Hello"
hex_str = text.encode("utf-8").hex(" ")
# "48 65 6c 6c 6f"

# Hex back to text
bytes_obj = bytes.fromhex(hex_str)
result = bytes_obj.decode("utf-8")

Node.js

const buf = Buffer.from("Hello", "utf-8");
console.log(buf.toString("hex"));
// "48656c6c6f"

What is the difference between encoding and encryption?

Encoding transforms data into a different format for interoperability (like UTF-8 bytes or hex), while encryption secures data so it cannot be read without a key. Encoding is reversible without a key and is not designed for security.

Why do I see different byte sequences for the same text?

Different encodings represent the same characters using different byte sequences. For example, the character "é" is one byte (0xE9) in Latin1 but two bytes (0xC3 0xA9) in UTF-8. This tool lets you compare how the same text looks in different encodings.

What output formats are available?

You can view encoded bytes in four formats: Hex (48 65 6C), Percent (%48%65%6C, URL-style), Decimal (72 101 108), and Binary (01001000 01100101 01101100). All formats are space-separated for readability.

Is this tool safe for sensitive data?

Yes. All processing happens entirely in your browser using JavaScript's built-in TextEncoder and TextDecoder APIs. Your data is never uploaded to any server, stored, or logged.

How do I fix garbled text (mojibake) from a copied file?

Mojibake happens when bytes encoded in UTF-8 are misinterpreted as Latin1 (or vice versa). Paste the garbled text here, try decoding with each encoding, and pick the one that produces readable output. The most common fix is re-encoding: decode as Latin1, then re-encode as UTF-8.