Linux · Graphics & Design
Ermis
Hide content in images or audio
by Alamahant
Official site: flathub.org
About Ermis
Ermis is a cross-platform steganography application that allows you to hide and extract
secret data within digital media files. Named after the Greek god of messages and
communication, Ermis enables covert communication through innocent-looking image and
audio files.
Image Steganography:
Hide data in PNG, JPG, and BMP images using LSB (Least Significant Bit) techniques
Live preview of original and modified images with side-by-side comparison
PRT Artistic Mode: Specialized visual steganography for camera-scannable codes
Real-time capacity indicator showing available hiding space
Audio Steganography:
Support for WAV, MP3, FLAC, and OGG audio files
Automatic conversion of non-WAV files using FFmpeg
Built-in audio player with play/pause/stop and volume controls
Metadata extraction for accurate capacity calculation
Data Handling:
Text input for hiding plain messages with UTF-8 encoding
File input for hiding any file type with filename preservation
Smart marker system (0x00 for text, length byte for files)
Automatic detection of data type during extraction
Security Features:
How to install Ermis
- Click Download — the developer's official website opens in a new tab.
- Download the latest version there and run it. Choose Custom/Advanced where offered, and skip any bundled extras.
- Prefer the command line? With Flatpak you can install and update it with: flatpak install flathub io.github.alamahant.Ermis
- Open Ermis once it finishes installing.
Frequently asked questions
Is Ermis free to download?
Yes. The Download button sends you to flathub.org, the developer's official site, where Ermis is available to download. Flatnic doesn't host or modify any files.
How do I install Ermis from the command line?
With Flatpak, run: flatpak install flathub io.github.alamahant.Ermis. This installs it from the official source and keeps it updated.
Is Ermis safe?
Ermis downloads directly from the developer. As always, scan the installer with your antivirus and choose Custom setup to skip any bundled extras.