Hex Dump Viewer
Truecolour hex dump with byte-value colorization, ASCII view, and entropy analysis. Paste hex data to visualize patterns, strings, and data structure.
What is the Hex Dump Viewer?
The Hex Dump Viewer is a free online tool that generates a truecolour hex dump of any hexadecimal data. Each byte is colorized based on its numeric value (0x00–0xFF) using an HSL colour spectrum, making it easy to visually identify strings, NULL regions, headers, and areas of high or low entropy. The tool includes Shannon entropy analysis and ASCII ratio statistics.
- Paste your hexadecimal data into the input field, or click "Load Sample" for example data.
- Select the bytes per row (8, 16, or 32) to adjust the display width.
- Click "Generate Hex Dump" to produce the colourized output.
- Review the statistics panel for total bytes, unique bytes, entropy, and ASCII ratio.
- Use the colour legend to interpret byte values at a glance.
What is a truecolour hex dump?
A truecolour hex dump colorizes each byte based on its numeric value (0x00–0xFF). This makes it easy to visually identify patterns, strings, NULL regions, and areas of high or low entropy in binary data.
What does Shannon entropy tell me about my data?
Shannon entropy measures the randomness of byte values on a scale of 0 to 8 bits. Low entropy (near 0) means highly repetitive data, while high entropy (near 8) indicates compressed or encrypted data.
Is my data safe when using this tool?
Yes. All processing is done entirely in your browser using JavaScript. No data is ever sent to a server. You can verify this by checking the network tab in your browser's developer tools.