Spaces and tabs placed at the end of a line are invisible in a text editor. Some steganography tools use them to hide a message: each space is a 0, each tab a 1, and eight bits make a character. Paste a text, the address of a Lab text file, or choose a file.
or , or paste the text below:
In real life: stegsnow (SNOW), an editor's « show invisible characters » mode (Notepad++, VS Code), a hex editor (20 = space, 09 = tab). Copy-pasting into some software strips these spaces: work on the original file.