Hex Encoding Converter

Hexadecimal encoding represents each byte of text as a two-character code using digits 0 through 9 and letters A through F. Hex encoding and decoding run in either direction: plain text converts into its hex byte representation, and a hex string converts back into readable text. All three major single-byte and multi-byte encodings are supported, which makes it straightforward to inspect how characters map to raw bytes.

• Encoding accepts any text, including Unicode characters such as accented letters, CJK ideographs, or emoji. Decoding accepts hex bytes in any of the supported delimiter formats.
• Hex bytes can be separated with spaces (48 65 6C), no separator at all (48656C), a 0x prefix on each byte (0x48 0x65 0x6C), colons (48:65:6C), or dashes (48-65-6C). The no-separator form is the most compact for pasting into source code, while a spaced or colon-separated form is easier to scan by eye when checking a byte sequence manually. Output can render in uppercase (A through F) or lowercase (a through f).
• Character encoding governs how characters map to bytes. UTF-8 handles the full Unicode range, encoding multi-byte characters as multiple hex pairs. ASCII covers the 0 through 127 range and replaces an out-of-range character with a question mark (3F). Latin-1 extends ASCII to cover the 0 through 255 range, which matters when the source text was written on a system that never used UTF-8.
• A byte count and character count accompany the output, summarizing the conversion at a glance; since every byte becomes exactly two hex digits, the byte count is always half the number of hex digits in a continuous string.
• Decoding accepts hex input in any delimiter format regardless of the current delimiter setting; mixed formats such as "48 65 0x6C 6C-6F" parse correctly. A character outside the hex alphabet triggers an error notification rather than a silent misread.

Hex encoding appears throughout software development, network analysis, data processing, and digital forensics. Converting between text and hexadecimal byte sequences is a routine step in debugging, protocol analysis, and data verification workflows.

• Web Development: Inspect URL-encoded characters, verify UTF-8 byte sequences in HTTP headers, or decode hex-escaped values from query strings and cookies during debugging sessions.
• Network Analysis: Read hex dumps from packet captures (Wireshark, tcpdump) by decoding the hex payload to see the transmitted text content in protocols like HTTP, SMTP, or DNS.
• Database Administration: Decode BLOB fields stored as hex strings to verify their text content, or encode text values to insert them directly as hex literals in SQL statements.
• Embedded Systems: Prepare firmware strings or configuration payloads as hex byte arrays for microcontroller programming. Verify that multi-byte UTF-8 characters produce the expected byte count before allocating buffer space.
• Security Research: Analyze hex-encoded payloads from log files, decode obfuscated strings found in malware samples, or encode test payloads for penetration testing input fields.
• File Format Inspection: Examine magic bytes at the start of binary files (PDF starts with 25 50 44 46, PNG starts with 89 50 4E 47) by encoding known signatures and comparing them against hex editor output.
• Data Migration: Convert text fields to hex for safe transport through systems that do not support special characters, then decode on the receiving end to restore the original content without corruption.
• Education: Explore how UTF-8 encoding works by comparing single-byte ASCII characters against multi-byte sequences for accented or non-Latin characters and observing the resulting byte sequences.