Flatnic

Linux · Graphics & Design

Ermis

Hide content in images or audio

by Alamahant

Download

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

  1. Click Download — the developer's official website opens in a new tab.
  2. Download the latest version there and run it. Choose Custom/Advanced where offered, and skip any bundled extras.
  3. Prefer the command line? With Flatpak you can install and update it with: flatpak install flathub io.github.alamahant.Ermis
  4. Open Ermis once it finishes installing.
How to install Linux apps with Flatpak

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.

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