How to hide a file in a jpg file?

Preparation: 1. A picture 2. A txt file for testing 3. WinRAR

steps:

1: Prepare a picture, such as 123.jpg. Prepare the target file, such as test.txt. We want to hide test.txt in the picture.

2: Compress the file test.txt to be hidden with WinRAR. Generate test.rar archive

3: Open the command line prompt: Click "Start → Run", and enter "cmd".

4: We assume that both files are stored under "D:". Enter the command: copy /b D:123.jpg + D:test.rar D:123.jpg

5: ok, try to open the generated picture 123.jpg, yes, it is indeed the original picture.

6: How to open that txt file? Open WinRAR, click "File → Open (shortcut Ctrl + O)", then select the file type as "All files", find 123.jpg, select Open to see if there is a txt file?

This method is suitable for all files. If there are any private files (what do you know) that you don’t want to be seen, put them away quickly