HexViewer
HexViewer is a free, open-source developer tool for Android. Hexadecimal viewer for Android. It has 237 GitHub stars and is released under the GPL-3.0-or-later license, and you can install it from F-Droid.
- Android
- Java
- Developer & terminal tools
- Actively maintained
About HexViewer
This application offers the following features : - Opening all files without a corresponding Android application (1). - Display of the file in hexadecimal (or plain text) with the possibility to modify the content (in hexadecimal only). - Saving the file on the smartphone/tablet (2). - Search option in the open file (hexadecimal and plain text modes). (1) At first, the file can only be saved via "save as" and due to Android permissions reasons, the only way to make it appear in the list of recent files is to reopen it. (2) Due to file permissions, after a "save as", the list of recent files cannot be updated with the new file location.
Privacy and F-Droid
F-Droid builds HexViewer from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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What is HexViewer?
HexViewer is a free, open-source developer tool for Android. Hexadecimal viewer for Android. It has 237 GitHub stars and is released under the GPL-3.0-or-later license, and you can install it from F-Droid.
Is HexViewer free and open source?
Yes. HexViewer's source code is public on GitHub under the GPL-3.0-or-later license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install HexViewer?
You can install HexViewer from F-Droid (package fr.ralala.hexviewer); the links are on this page. Its GitHub repository also publishes releases (latest: v1.59.10).
Is HexViewer still maintained?
The repository's most recent commit was on Oct 4, 2026. Its F-Droid listing was last updated on Oct 6, 2026. appsgit only lists apps whose repository had a commit in the last six months.