What is a HEX editor?

A HEX editor is a tool that displays and edits binary file contents in hexadecimal format. It shows both hexadecimal values and corresponding ASCII characters side by side, allowing you to view and modify raw byte data. Commonly used for reverse engineering, file analysis, and data recovery.

Is this tool safe? Are files uploaded to a server?

Absolutely safe. This tool uses the browser's FileReader API for 100% client-side processing. Your file data never leaves your device and is never uploaded to any server. All processing happens in your browser.

What file size is supported?

Files up to 10MB are recommended for optimal performance. Larger files may cause browser slowdown. For very large files, consider using a dedicated desktop HEX editor.

Can I edit HEX values?

Yes! Click on any hexadecimal value to edit it. The corresponding ASCII character updates automatically. After editing, you can export the modified file.

What file formats are supported?

All file formats are supported. The tool reads files in binary mode, so any file (images, documents, executables, archives, etc.) can be viewed in hexadecimal.

How do I search for specific bytes?

Enter a hexadecimal string (e.g. FFD8) or ASCII text in the search box and click Search. Supports both forward and backward search with result highlighting.

Online HEX Editor - View & Edit Binary Files

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Offset

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

ASCII

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Upload a file to view its HEX content

All file formats supported. 100% client-side processing.

🔧 Online HEX Editor