Hex Dump Online
Inspect binary files and byte streams with canonical 16-byte offset rows, ASCII gutters, Big/Little Endian toggling, and 100% client-side privacy.
The Hex Dump Online is a fast, accurate Developer Tools utility designed to inspect binary files and byte streams with canonical 16-byte offset rows, ascii gutters, big/little endian toggling, and 100% client-side privacy. entirely in your browser with zero server data storage.
Interactive Hex Dump & Byte Stream Viewer
Inspect binary payloads and files with 16-byte canonical offset grids, ASCII gutter, Little/Big Endian toggling, and C array exports.
Low-Level Binary Memory Analysis & Hex Inspection
Hex dumps are the standard visual diagnostic tool used by systems engineers, reverse engineers, and embedded developers to inspect raw binary data structures, verify file magic numbers, analyze network packet captures, and debug memory buffers.
Anatomy of a Canonical Hex Grid
- Offset Address: An 8-digit hexadecimal value representing the byte index relative to the start of the buffer (
0x00000000, 0x00000010, 0x00000020). - Hexadecimal Data Field: 16 bytes per row grouped into pairs of hexadecimal digits representing raw octets (values
00toFF). - ASCII Text Gutter: Decodes printable characters (ASCII 32 to 126). Bytes outside this printable range (such as null bytes
0x00, line feeds0x0A, and extended characters) are rendered as period dots (.).
Air-Gapped Client-Side Execution
Whether you are inspecting compiled binaries, proprietary firmware, or encrypted data payloads, all operations execute client-side in browser RAM via the Web API ArrayBuffer and Uint8Array interfaces, ensuring absolute confidentiality.
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Help your team and fellow developers save time with free, private client-side utilities.
Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools
How to Use Hex Dump Online
Load File or Enter Text
Click Load Binary File to inspect any file (image, executable, PDF, packet capture) or type text into the input field.
Configure Byte Layout & Endianness
Toggle between Big Endian and Little Endian, and group bytes into 1-byte, 2-byte, or 4-byte columns.
Search Byte Sequences
Type hexadecimal bytes (e.g. 48 65) or ASCII characters in the search box to highlight matching offsets.
Export to Code or File
Export the hex stream as a formatted C uint8_t array, Assembly .byte sequence, or plain text dump.
Practical Examples & Conversions
sample.png header bytes
00000000: 89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 |.PNG........IHDR|
Frequently Asked Questions (PAA)
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Authoritative Standards & Citations
Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:
RFC 7519: JSON Web Token (JWT)
Standardized compact, URL-safe means of representing claims to be transferred between two parties.
Web Cryptography API Specification
Standard JavaScript API for performing basic cryptographic operations in web applications.
RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace
Definition of uniform format and generation algorithms for UUIDs.