# Hex Editor (File Viewer) Upload any binary file and inspect it as a classic hex dump with offset, hex bytes, and ASCII columns (read-only) > Canonical page: https://elysiatools.com/en/tools/hex-editor - **Category:** Development - **Keywords:** hex, hexdump, binary, viewer, inspector, xxd, file, byte, hex editor ## Overview The Hex Editor (File Viewer) is a read-only binary file inspector that generates a classic hex dump showing offsets, hex bytes, and ASCII representations. It allows developers and security analysts to inspect raw file contents, customize bytes per line, highlight null bytes, and limit display sizes without installing local command-line utilities. ## Inputs - **Upload File** (file) - **Bytes Per Line** (select) - **Max Bytes to Display** (number) - **Show ASCII Column** (checkbox) - **Uppercase Hex** (checkbox) - **Highlight Null Bytes (00)** (checkbox) ## When to use - When you need to inspect the raw binary structure of a file without executing it or installing local command-line tools. - When debugging file corruption, header mismatches, or unexpected null bytes in application outputs. - When verifying the exact byte sequence, magic numbers, or embedded ASCII strings inside compiled binaries or proprietary formats. ## How it works - Upload any binary or text file using the file input field. - Configure display preferences such as bytes per line, uppercase formatting, and whether to highlight null bytes. - View the generated interactive HTML table displaying the offset, hexadecimal representation, and corresponding ASCII characters. ## Use cases - Checking file headers (magic bytes) to identify unknown or corrupted file types. - Inspecting compiled binaries for embedded plain-text strings or configuration values. - Analyzing network packet captures or raw data payloads saved as binary files. ## Frequently asked questions ### Can I edit and save the file back to disk? No, this is a read-only hex viewer designed for inspecting file contents, not modifying them. ### What is the maximum file size I can upload? You can upload files up to 10 MB, but the display output is limited to a maximum of 512 KB (524,288 bytes) to maintain browser performance. ### Does this tool send my file data to a server? No, the file is processed locally in your browser to ensure your data remains private and secure. ### What does the 'Highlight Null Bytes' option do? It visually highlights '00' bytes in the hex grid, making it easier to spot padding, empty space, or null terminators. ### Can I change the layout width of the hex dump? Yes, you can adjust the 'Bytes Per Line' setting to display 8, 16, 24, or 32 bytes per row. ## Related tools - [File Type Detector (Magic Number)](https://elysiatools.com/en/tools/file-type-detect): Identify a file by its magic-number byte signature, not the extension. 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