Hex Editor

The Online Hex Editor lets you inspect and modify the raw bytes of any text or file directly in your browser. It displays data in the classic hex dump format used by tools like xxd, hexdump, and od — three side-by-side columns showing the byte offset, hexadecimal values, and their ASCII representation.

All processing is done entirely client-side. Your data never leaves your machine — no server requests are made and nothing is stored or logged. This makes it safe to inspect sensitive files, binary payloads, or proprietary data formats without worrying about privacy.

You can load data in two ways: paste or type text into the text input (which is converted to UTF-8 bytes), or drag-and-drop a file from your desktop. The tool handles files up to 1 MB in the display view. Each row shows 16 bytes with an extra space separating the first and second groups of eight, matching the standard hex dump convention that most developers are familiar with.

Editing is fully interactive. Click any hex byte to type a new two-digit hex value, or click an ASCII character to type a replacement directly. The built-in search supports both hex byte patterns and ASCII text, and the go-to-offset feature lets you jump to any position instantly. When you are done editing, export the modified data as a binary file download, or copy the entire hex dump as formatted text to your clipboard.

Whether you are debugging binary protocols, inspecting file headers, reverse-engineering data formats, or simply learning how text is represented in memory, this hex editor provides a fast, zero-install solution that runs anywhere a modern browser does.

1. Choose an input mode: Text to type or paste content, or File to load a binary file.
2. In text mode, type or paste your text. The hex dump updates instantly as you type.
3. In file mode, drag and drop a file onto the drop zone, or click browse to select a file from your computer.
4. Click any hex byte in the hex column to edit it. Type a two-digit hex value and press Enter or Tab to move to the next byte.
5. Click any character in the ASCII column to edit it directly. Type a character and the cursor advances automatically.
6. Use the Search button to find hex byte sequences or ASCII text within the data. Navigate between matches with Prev and Next.
7. Click Copy (or press Ctrl+Shift+C) to copy the formatted hex dump, or Export to download the modified data as a file.