FAQs

What is the "HexDump - Hex Viewer" extension and how does it work?
After installation, access the interface by clicking on the action button. Subsequently, either double-click on the interface or drag and drop any file onto the interface to show its hexadecimal and ASCII representations. A scrollbar will automatically appear on the right-hand side of the view if the file is larger than the view. Additionally, use the jump tool located on top of the view to swiftly navigate to a specific offset within the file. The extension supports customization of the displayed number of columns and rows, with these adjustments persisting across sessions. To open a new file, drop it onto the existing view. The extension seamlessly transitions from the previous file to the newly opened one within the current view.
recommended "Libre Email Client" extension for Chrome, and Edge browsers.
"Libre Email Client" is a full-featured IMAP email client that runs entirely in your browser, syncing mail from any IMAP server to a local Maildir store (in browser storage or a chosen directory) via a compiled WASM core with native TLS. It supports multiple accounts, server-side search, conversation threading, automatic and manual sync, message filters with move/stop actions, and an optional native client for local file operations like Spam/Archive/Trash overrides.
What's new in this version?
Please check the Logs section.
After installing the extension, why I cannot locate the action button in my toolbar area?
It's possible that the extension hasn't been pinned to the toolbar yet. Here's how you can pin it:
- Click on the puzzle piece icon located at the end of the toolbar area. This represents the Extensions menu.
- In the Extensions menu, locate the extension you've installed.
- Click on the pin icon next to the extension name. This will pin the extension to the toolbar, making its action button visible.

How does the hex viewer can be used to determine a file's type?

When using a hex viewer, the user can pinpoint magic bytes, also known as magic numbers or file signatures, to identify the type of a file based on its binary contents. These magic bytes are specific sequences of bytes located at the beginning of a file that uniquely identifies its file format. When you open a file in a hex viewer, you can read the initial bytes and compare them against known magic byte patterns associated with various file formats to guess the file format.

For instance, let's consider the PNG (Portable Network Graphics) file format. A PNG file always starts with the following 8-byte sequence in hexadecimal representation: 89 50 4E 47 0D 0A 1A 0A. These bytes serve as the PNG file signature. In a hex viewer, if you observe these bytes at the beginning of a file, it indicates that the file is likely a PNG image.

Here's a table with known file extensions along with their corresponding magic numbers and their location in a file:

File Type	Extension	Magic Bytes (Hexadecimal)	Location in File
PNG (image)	.png	89 50 4E 47 0D 0A 1A 0A	Beginning of the file
JPEG (image)	.jpg, .jpeg	FF D8 FF	Beginning of the file
GIF (image)	.gif	47 49 46 38 37 61	Beginning of the file
PDF (document)	.pdf	25 50 44 46	Beginning of the file
ZIP (archive)	.zip	50 4B 03 04	Beginning of the file
RAR (archive)	.rar	52 61 72 21 1A 07 00	Beginning of the file
MP3 (audio)	.mp3	49 44 33 03	Beginning of the file
WAV (audio)	.wav	52 49 46 46 xx xx xx xx 57 41 56 45	Beginning of the file
MPEG (video)	.mpeg	00 00 01 Bx	Beginning of the file
MP4 (video)	.mp4	00 00 00 18 66 74 79 70 33 67 70 35	Beginning of the file
AVI (video)	.avi	52 49 46 46 xx xx xx xx 41 56 49 20	Beginning of the file
DOCX (document)	.docx	50 4B 03 04	Beginning of the file
XLSX (spreadsheet)	.xlsx	50 4B 03 04	Beginning of the file
PPTX (presentation)	.pptx	50 4B 03 04	Beginning of the file
TAR (archive)	.tar	75 73 74 61 72	Beginning of the file
APK (Android application)	.apk	50 4B 03 04	Beginning of the file
EXE (executable)	.exe	4D 5A	Beginning of the file
DLL (library)	.dll	4D 5A	Beginning of the file
HTML (web page)	.html	3C 68 74 6D 6C 3E	Beginning of the file
CSS (style sheet)	.css	2E 63 73 73	Beginning of the file
JS (JavaScript)	.js	2F 2A	Beginning of the file
PHP (script)	.php	3C 3F 70 68 70	Beginning of the file
TIFF (image)	.tiff	49 49 2A 00	Beginning of the file
BMP (image)	.bmp	42 4D	Beginning of the file
PSD (image)	.psd	38 42 50 53	Beginning of the file
AI (image)	.ai	25 21 50 53 2D 41 64 6F 62 65 0A	Beginning of the file
FLAC (audio)	.flac	66 4C 61 43 00 00 00 22	Beginning of the file
MOV (video)	.mov	6D 6F 6F 76	Beginning of the file
OGG (audio/video)	.ogg	4F 67 67 53	Beginning of the file

Features

FAQs

Reviews

What's new in this version

Need help?

Keywords

Permissions are explained

Recent Blog Posts