TinyEncrypt

TinyEncrypt is a small-sized and portable utility that can effortlessly encrypt and decrypt text. This is a common method for sending secret messages to friends over the Internet if you worry they could be intercepted by a third party.

Plain interface for text encryption and decryption

The interface is rather simple. The main window contains an orange box for entering text to encrypt or decrypt, along with a green one for reading results and optionally saving them to a plain text document to record decrypted messages.
Text can be typed, pasted from the Clipboard or loaded from TXT files. Both encryption and decryption jobs can be performed with one click, and these tasks are speedy, depending on the content size. Worth noting is that content can be encrypted for as many times as you want if you're interested in strengthening security.

Uses a low-level security algorithm

Unlike many encryption utilities out there, TinyEncrypt doesn't ask you to enter a secret key necessary for decryption. Instead it uses a predefined algorithm, which is rather easy to figure out, at least when it comes to the alphabet and numbers.
To be more precise, it transforms letters and numbers by shifting the position in the alphabet and numbering sequence in reverse by one unit. For example, B is encrypted into A, Z into Y, 1 turns into 0, and 9 into 8.

Doesn't need setup

Installation isn't necessary. The utility's packed in just one executable file that can be dropped anywhere on the disk or USB flash drive and directly launched on any PC by double-clicking it. No updates are made to the Windows registry in this regard, and no files or folders are generated on the disk without your permission.

Modest text encryption tool with weak spots

Taking everything into account, TinyEncrypt delivers a fast solution and easy-to-use options for encrypting and decrypting text. However, the code can be quickly cracked, due to the low-level security algorithm adopted. We are also keeping in mind that the program hasn't been updated for a long time.