Hex Viewer

Professional hex analysis tool with interactive navigation, search capabilities, and comprehensive file inspection features. Runs entirely in your browser - your files stay private.

What Is a Hex Viewer?

A hex viewer (also called a hex dump tool or binary viewer) displays the raw contents of any file in hexadecimal format. Instead of seeing text or images, you see the underlying bytes that make up the file - each represented as a two-character hex value like FF, 4D, or 00.

Hex viewers are essential tools for developers, security researchers, and anyone who needs to inspect file structures, debug binary data, reverse engineer file formats, or verify checksums. Our online hex viewer lets you do all of this directly in your browser without installing any software.

How to Use the Hex Viewer

1

Choose Your Input

Click Upload File to select any file from your device (up to 50MB), or click Enter Text/Data to paste raw text or hex values directly.

2

Click "View Hex"

Hit the View Hex button to render your data. You'll see the hex grid on the left and the ASCII representation on the right.

3

Inspect & Navigate

Click any byte to see its offset, decimal, and ASCII value. Use the Search box to find hex patterns or text, or jump to a specific offset using the navigation controls.

4

Copy or Export

Use "Copy Hex" to copy the hex dump to your clipboard, or "Export" to save the raw binary data back as a file.

Input Data

Upload File

Select a file to view in hex format

Enter Text/Data

Type or paste text or hex data directly

0 matches
Size: 0 bytes
Selected: None
Offset: 0x00000000

Advanced Binary Forensics: Beyond the Raw Hex

Viewing hex is only the first step in digital forensics. To truly understand a file, a developer must look past the FF and 00 values and identify the Structural Patterns that define modern computing. Every file on your hard drive contains "DNA": hidden markers that tell the operating system exactly what it is dealing with.

1. The Magic of Magic Bytes

File extensions (like .jpg or .exe) are just suggestions. A true professional identifies a file by its Magic Bytes: the specific hexadecimal signature at the very beginning (offset 0) of the file. For example, every Java class file begins with the hex values CA FE BA BE.

Using this Hex Viewer, you can verify if a file has been tampered with or renamed maliciously by checking its header against our reference table below.

2. Big-Endian vs. Little-Endian

Computer processors don't all agree on how to read multi-byte numbers. Big-Endian systems (like older PowerPC Macs) store the most significant byte at the smallest address. Little-Endian systems (like Intel/AMD x86-64) do the opposite.

When inspecting network packets or firmware dumps in this hex viewer, understanding "Byte Swapping" is critical. A value that looks like 01 02 in hex might represent the number 258 or 513 depending on the architecture's endianness.

Magic Bytes Reference Table (Common Signatures)

File Format Hex Signature (Magic Bytes) ASCII Equivalent
PNG Image89 50 4E 47 0D 0A 1A 0A.PNG....
JPEG/JPGFF D8 FF E0....
PDF Document25 50 44 46%PDF
ZIP Archive50 4B 03 04PK..
Windows EXE4D 5AMZ
GIF Image47 49 46 38 39 61GIF89a

Real-World Use Cases for Hex Analysis

  • Malware Hunting: Security analysts use hex viewers to find hidden URL strings or malicious code blocks inside "innocent" files.
  • Data Recovery: When a file header is corrupted, you can manually re-type the magic bytes (e.g., %PDF) to fix the file and open it.
  • Firmware Debugging: Embedded engineers inspect raw memory dumps from microcontrollers to verify sensor data or register states.
  • Software Engineering: Developers use hex to confirm the output of serial communications or to inspect compiled binary artifacts.

Frequently Asked Questions

What is a hex viewer used for?

A hex viewer is a professional diagnostic tool that displays the raw binary contents of any file. It is used by developers for debugging, security researchers for forensic analysis, and engineers for reverse-engineering proprietary file formats.

What are "Magic Bytes" in a file?

Magic bytes are a sequence of hexadecimal numbers at the very beginning of a file that identify its format to the operating system. For example, 89 50 4E 47 identifies a PNG image. Our hex viewer allows you to inspect these bytes to verify a file's integrity.

Is it safe to view sensitive binary files online?

Yes, provided the tool is built correctly. Our Hex Viewer uses Client-Side Processing, meaning your files never leave your computer. All binary analysis happens entirely within your browser's local sandbox, ensuring 100% privacy and security.

Why do some characters show as dots (.) in the ASCII sidebar?

Many binary values do not represent readable letters or numbers. These are called "non-printable characters" (like null bytes or control codes). Most hex viewers represent these with a dot to keep the layout clean while showing you exactly where the readable data begins.

How do I jump to a specific location in a large file?

Use the **Go to Offset** feature. You can enter a hexadecimal address (e.g., 0x40) or a decimal value to instantly jump to that specific byte. This is essential when analyzing large firmware dumps or log files.

Can I use this tool as a Hex Editor?

Yes. While primarily a viewer, this tool allows you to inspect and analyze the raw data structure. You can also export the modified hex dump back into a raw binary file using the **Export** functionality.

Quick Access to Tools

Data Converter Image Converter Image Hex Home About Support