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Text to Hex Converter

Convert plain text to hexadecimal instantly online. Free text to hex converter with full UTF-8 support. Each character is encoded as its hex byte value. No signup required.

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Hexadecimal encoding represents each byte of binary data as two hexadecimal digits (0–9, A–F), producing a printable ASCII string. Because one hex digit maps exactly to four bits, hex is the most compact human-readable representation of raw byte sequences. It is used throughout computing wherever binary data must be displayed, logged, or embedded in text-based formats.

Hex encoding appears in cryptographic output (hash digests, HMAC tags, TLS session IDs), network protocol dumps (Wireshark packet bytes, TCP stream hex views), color codes in CSS and graphics formats, escape sequences in URLs and HTML (e.g., %20, A), and bytecode representations in programming language specifications and compiler output.

This tool encodes text to hex using the browser's TextEncoder API, which converts the input string to its UTF-8 byte representation first. Each byte is then formatted as a two-digit uppercase hex value. Output bytes are separated by spaces for readability, making individual byte values easy to identify and compare.

Common Use Cases

Inspecting UTF-8 byte sequences

UTF-8 encodes non-ASCII characters as multi-byte sequences. When debugging an encoding issue — such as a string arriving corrupted after passing through a legacy system that assumes Latin-1 — converting the original text to hex shows the exact byte sequence, making it possible to identify where the encoding transformation went wrong.

Embedding binary data in protocol buffers

Protocol Buffer text format and some debug tools display byte fields as hex strings. When constructing test proto messages by hand for gRPC testing with tools like grpcurl or evans, converting the expected string value to hex lets you specify the bytes field value in the format these tools accept.

Creating hex escape sequences for source code

C, Python, and Go string literals accept hex escape sequences (\x41, \x00) for embedding non-printable bytes. When writing unit tests for binary protocol parsers or file format readers, converting a known input string to hex provides the byte-level escape sequences needed to construct the test fixture string literal.

Debugging network packet payloads

Wireshark and tcpdump display packet payloads as hex dumps alongside ASCII. When constructing test packets manually with tools like Scapy or crafting raw socket payloads, converting the intended string content to hex first confirms the exact byte values that should appear in the packet capture for comparison.

How to Use the Text to Hex Converter

  1. Type or paste any text in the left panel.
  2. The hex output appears instantly — each byte as two hex digits separated by spaces.
  3. Click Copy Output to copy the hex string.
  4. Use Load Example to see how "Hello, World!" is encoded.

Common Uses