FREE ONLINE CRYPTOGRAPHY TOOLS
Decode the hidden.
Build the curious.
Simple, fast tools for ciphers, codes and text transformations. Everything runs in your browser.
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● ReadyCaesar Cipher
Shift letters by a fixed amount to encode or decode a message.
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Transform text as you type, with no loading screens or sign-ups.
Private by design
No text is uploaded. Your inputs stay inside your browser.
Made for learning
Clear controls and plain-language explanations for every tool.
TOOL DIRECTORY
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Every tool runs in your browser. No sign-up, upload or setup needed.
Caesar CipherShift letters to encode or decode.Cipher · Runs locally
Binary to TextRead binary values as plain text.Encoding · Runs locally
Morse CodeTranslate dots, dashes and messages.Signals · Runs locally
Base64Encode text for safe transport.Encoding · Runs locally
URL EncoderEncode or decode URL components.Web · Runs locally
Text Case ConverterSwitch between seven useful cases.Text · Runs locally
Reverse TextFlip characters and emoji instantly.Text · Runs locally
A1Z26 CipherTurn letters into alphabet numbers.Cipher · Runs locally
Rail Fence CipherTry the classic zig-zag cipher.Cipher · Runs locally