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.

Caution: Opening files that are too large seriously degrades application performance and can suddenly stop the application on low-resource devices.

**WARNING:** This application cannot open files larger than ~20 MB on recent smartphones and less for older smartphones.

**WARNING:** Searching within the plain text view may become excessively slow when handling large files.

A special thanks to @OmlineEditor for her patience and help, without her this application would not be at this level.

This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY.


Translations:
* Arabic: @sec.xyx (weblate), @amro (weblate)
* Bulgarian: @trunars (weblate)
* Chinese: @sr093906 (github), @alchemillatruth (weblate), @hamburger1024 (weblate), @inworless (github), @hamburger2048 (weblate)
* Czech: @hajdam (github)
* Dutch: @AudeBelgraver (weblate)
* English: @Keidan (github), @comradekingu (github)
* French: @Keidan (github), @Edanas (weblate)
* German: @iNtEgraIR2021 (github), @eUgEntOptIc44 (github), (+DeepL)
* Greek: @VisionR1 (github)
* Indonesian: @Velorixen (github)
* Italian: @eUgEntOptIc44 (github), @tfrtint (weblate)
* Hebrew: @Shopimisrel (github)
* Hindi: @Scrambled777 (github)
* Hungarian: @SziaTomi (github)
* Japanese: @gnuhead-chieb (github)
* Norwegian Bokmål: @comradekingu (github)
* Persian: @qaria185-blip (github)
* Portuguese (Brazil): @Bardock88 (github), @pedrolinharesmoreira (github), @croomfolk (weblate)
* Portuguese (Portugal): @SantosSi (github), @AntonioOliveira2 (github)
* Russian: @OmlineEditor (github), @AHOHNMYC (github), @racingrebel (github), @Usland123 (github)
* Spanish: @sguinetti (github), @gallegonovato (weblate), Libertad (weblate)
* Tamil: @TamilNeram (github)
* Turkish: @ersen0 (github)
* Turkish (Ottoman): @bgo-eiu (github)
* Vietnamese: @unbiaseduser (github)

Note: In the settings, the list of languages is sorted as follows (according to the alphabetical order of their codes):
* ar: Arabic
* bg: Bulgarian
* cs: Czech
* de-DE: German
* en-US: English
* el: Greek
* es-ES: Spanish
* fa: Persian
* fr-FR: French
* hi: Hindi
* hu-HU: Hungarian
* in-ID: Indonesian
* it-IT: Italian
* iw: Hebrew
* ja-JP: Japanese
* nb-NO: Norwegian Bokmål
* nl-NL: Nederlands
* ota: Turkish (Ottoman)
* pt-BR: Portuguese (Brazil)
* pt-PT: Portuguese
* ru-RU: Russian
* ta-IN: Tamil
* tr-TR: Turkish
* vi-VN: Vietnamese
* zh-CN: Chinese

Fonts:
This application includes the JetBrains Mono font (© JetBrains), licensed under the SIL Open Font License, Version 1.1.
See `AUTHORS.txt` in the licences/JetBrainsMono-2.304 folder for a full list of authors.

Is HexViewer free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does HexViewer require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is HexViewer safe to install?
We link to the exact APK published by F-Droid Open Source. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update HexViewer?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

1. Tap the Download APK button above and save the file to your device.
2. Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
3. Open the downloaded fr.ralala.hexviewer.apk file from your Downloads folder.
4. Tap Install and wait for Android to finish.
5. Open «HexViewer» by F-Droid Open Source and grant only the permissions it actually needs.
6. Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.