Hex Viewer
Inspect any file byte-by-byte with offset, hex, and ASCII — fully in-browser.
How to Use
- Drop or pick a file.
- Use the offset / count controls to page through large files.
Common magic bytes
About the Hex Viewer
The Hex Viewer is a free tool for image, audio and file tasks. It runs right in your web browser, so there is nothing to download. Inspect any file byte-by-byte with offset, hex, and ASCII — fully in-browser.
How it works
Type in what you have, and the answer shows up right away. Change anything and it updates by itself. Everything runs in your browser, so it is fast and nothing you type is sent away.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
File size limit?
Window reads only the requested range, so gigabyte files are fine.
Can I edit?
Read-only view for safety. For edits, download, modify, re-upload.
How do I use the Hex Viewer?
Just type your numbers. The answer shows up right away — there is no button to press. Change anything and it updates by itself.
Is it free? Does it work without internet?
Yes to both. It is free with no sign-up, and once the page has loaded it keeps working even with no internet.
Where does my data go?
Nowhere — every calculation runs on your own device. Nothing you enter is uploaded, logged, or stored.
Common Use Cases
Signature check
Look up magic bytes (e.g. PK → ZIP, 89 50 4E 47 → PNG).
Forensics
Inspect unknown files.
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