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

← Home / HEX Editor

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.

What is an Online HEX Editor?

An Online HEX Editor is a free browser-based tool that displays and edits binary file contents in hexadecimal format. It shows hex values and their corresponding ASCII characters side by side, letting you inspect and modify raw bytes in real time. All processing happens locally on your device — nothing is uploaded to any server.

Use Cases

Reverse engineering and binary file analysis
Inspecting file headers and signatures (ZIP, JPEG, PNG, etc.)
Finding and patching specific byte sequences
Editing game saves and binary data files

Key Features

100% Free & Client-Side: Files never leave your browser
Live Hex & ASCII Editing: Click any byte to modify it
Byte Search: Find hex or ASCII sequences instantly
Export Modified Files: Download your changes as a new file

Is this HEX editor accurate?

Yes. The tool reads files in binary mode and displays byte values exactly as they are. Edited bytes are written back byte-for-byte on export.

Do I need internet to use this HEX editor?

You only need internet to load the page. Once loaded, the tool runs entirely offline in your browser.

Is my data recorded?

No. There is no backend server. Your file data exists only in your browser's memory during the session.