Analyzer
Viewer
SecurityFile Hex Viewer
Preview the first bytes of any file in a clean hex dump. Inspect offsets, hex pairs, and ASCII columns to verify file contents securely in your browser.
About File Hex Viewer
File Hex Viewer lets you inspect the raw bytes of any file directly in your browser. Quickly review offsets, hexadecimal pairs, and ASCII representations without uploading sensitive data to a server. Ideal for verifying file integrity, spotting hidden headers, or debugging binary formats.
Why preview only part of the file?
Most magic bytes, headers, and embedded metadata live near the start of a file. The viewer loads the first few kilobytes so you get instant insight while keeping large files fast and responsive.
Can I adjust the bytes per row?
Yes. Choose between 8, 16, or 24 bytes per line to match your preferred hex layout. Wider rows give more context, narrow rows make individual values easier to scan.
Does the file leave my device?
No. All parsing happens in your browser. The tool uses FileReader to inspect bytes locally so private documents, archives, or executables never leave your machine.
What do the dots in the ASCII column mean?
Non-printable bytes, such as control characters or binary data, are shown as dots. Printable characters (letters, numbers, punctuation) are displayed directly so you can spot readable strings.