11 Best Free Online Caesar Cipher Encoder Websites

Here is a list of best free online Caesar cipher encoder websites. Caesar cipher is a type of substitution cipher technique that shifts each character of a message by a certain number of positions. It is named after Julius Caesar as this cipher method was used by him to encrypt his messages. This cipher isn’t considered very secure as it uses limited characters (26 alphabets). However, it is still used in puzzles, games, and educational purposes. If you want to encrypt your plain text data using the Caesar cipher technique, check out these online Caesar cipher encoder websites.

Through these websites, users can encode or encrypt plain text data using Caesar cipher. On some websites, users can also specify the shift value and customize the alphabet they want to use for the encoding. These websites are perfectly capable of performing decoding operations using Caesar cipher. The process of encoding and decoding data is quite simple on all these websites. Still, to help new users, I have included the data encoding steps in the description of each website.

These websites contain additional tools based on cipher techniques like Affine Cipher, Enigma Machine Cipher, Bacon Cipher, Polygrammic Cipher, Transposition Cipher, and more. Go through the list to learn more about these websites.

My Favorite Online Caesar Cipher Encoder Website:

dcode.fr is my favorite website as it explains the Caesar cipher encoding operation and supports both encoding and decoding operations. Plus, it lets users encode data using English, Latin, ASCII table, or custom alphabets.

You can also check out lists of best free Online A1z26 Cipher, Online Base32 Encoder, and Online ROT13 Encoder websites.

Comparison Table:

Features/Website Names	Supports Caesar cipher encoding and decoding	Lets users modify alphabets	Lets users specify a custom key
dcode.fr	✓	✓	✓
cryptii.com	✓	✓	✓
easybom.com	✓	x	✓
boxentriq.com	✓	x	✓
thewordfinder.com	✓	✓	✓
ciphereditor.com	✓	✓	✓
md5decrypt.net	✓	x	✓
xarg.org	✓	x	✓
randommer.io	✓	x	✓
calcont.in	✓	x	✓
crypto.interactive-maths.com	✓	✓	✓

dcode.fr

dcode.fr is a free online Caesar cipher encoder website. This website can perform Caesar cipher encoding using the English alphabet, Latin alphabet, ASCII table, and custom alphabet values. Plus, users can specify a specific Shift/ key value before starting the encoding process. It also explains the Caesar cipher and describes the Caesar cipher encoding process. Similar to encryption, it can also be used to perform Caesar cipher decoding operations. Now, follow the below steps.

How to perform Caesar cipher encoding online using dcode.fr:

Go to this website and pen up the Caesar Cipher section.
Now, enter the text data in the Caesar encoder field.
Choose or specify the type of alphabet you want to use and enter a Shift/ Key value.
Finally, tap on the Encrypt button to start the encryption process.

Additional Features:

This website has multiple encoder and decoder tools based on Polygrammic Cipher, transposition Cipher, and Modern Cryptography tools.

Final Thoughts:

It is one of the best free online Caesar cipher encoding websites that also explains the process of encoding data through a Caesar cipher encoder.

Pros	Cons
Can encode and decode data using Caesar cipher
Explains the encoding process
Describes Caesar Cipher

Home Page

cryptii.com

cryptii.com is a free online Caesar cipher encoder website. This website helps users encode sensitive data using the Caesar cipher encryption. Before starting the encoding, users can adjust the shift value, customize the cipher alphabet, and change the case strategy. An inbuilt Caesar cipher decoder to decode the data is also present. It also provides a brief description of the Caesar cipher. Now, follow the below steps.

How to perform Caesar Cipher encoding online using cryptii.com:

Go to this website and access the Caesar Cipher section.
Write or paste the plain text data you want to encode.
Next, adjust Caesar cipher settings.
Finally, view the ciphertext that users can copy.

Additional Features:

This website also contains encoding and decoding tools based on Affine Cipher, Enigma Machine Cipher, Bacon Cipher, Vigenere Cipher, and more.

Final Thoughts:

It is a good online Caesar cipher encoder website that helps users encode and decode data using the Caesar cipher method.

Pros	Cons
Can encode and decode data using Caesar cipher
Lets users adjust multiple cipher settings

Home Page

caesarcipher.net

caesarcipher.net is another free online Caesar cipher encoder website. This website provides a Caesar Cipher Translator tool that can perform both encoding and decoding operations. If you enter plain text data, then it encodes it to the cipher text. On the other hand, if you enter cipher text, then it decodes it to the original text data. Before encoding the data, users can specify a secure key. A basic description of Caesar’s cipher is also provided. Now, follow the below steps.

How to perform Caesar cipher encoding online using caesarcipher.net:

Go to this website and access the Caesar cipher translator.
After that, enter the plain text into the enter text field.
Now, specify a key.
Finally, tap on the Encode button to view the encoded ciphertext.

Final Thoughts:

It is another simple-to-use online Caesar cipher website that also uses a key with plain text data to perform Caesar cipher encoding.

Pros	Cons
Can encode and decode data using Caesar cipher
Users can specify a key

Home Page

boxentriq.com

boxentriq.com is another free online Caesar cipher website. This website offers multiple cipher tools, including the Caesar cipher decoder and encoder tool. As its name implies, this tool can encode and well as decode that data using the Caesar cipher encryption. Before starting the encoding process, users can specify a secure key. However, encoding without a key is also possible. At the time of decoding, users do need to provide the key if a key is used at the time of encoding. Now, follow the below steps.

How to perform Caesar cipher encoding online using boxentriq.com:

Visit this website and access the Caesar cipher tool.
After that, submit the text data and specify a key.
Next, tap on the Encode button to start the encoding process.
Finally, view and copy the cipher text from the Results section.

Additional Features:

This website offers multiple Classic and Modern cipher encoding and decoding tools.

Final Thoughts:

It is another simple-to-use online Caesar cipher encoder website that can encode plain text with or without using a key.

Pros	Cons
Can encode and decode data using Caesar cipher
Can encode data with or without using a key

Home Page

thewordfinder.com

thewordfinder.com is another free online Caesar cipher website. This website helps users encode and decode the data using the Cesar cipher. It also lets users enter custom alphabets they want in the encoding of data. Besides this, users can also specify a custom shift value. It also provides a cipher lookup table and steps to encode and decode data using this cipher method. Now, check out the below steps.

How to perform Caesar cipher encoding online using thewordfinder.com:

Go to this website and access the Caesar Cipher Decoder.
After that, choose the Encrypt section and enter the input message.
Now, specify the shift and custom alphabet values.
Finally, click on the Encode Text button to view the encoded data.

Additional Features:

This website offers multiple online tools like Word Scramble, Scrabble Word Finder, Scrabble Word Lists, Sudoku Solver, etc.

Final Thoughts:

It is another good online Caesar cipher encoder website that can encode and decode the data using the Caesar cipher method.

Pros	Cons
Can encode and decode data using Caesar cipher
Lets users specify a custom alphabet and key-value

Home Page

ciphereditor.com

ciphereditor.com is another free online Caesar cipher website. This website offers a Caesar cipher editor tool that helps users encode data using the Caesar cipher method. It supports multiple alphabet types like Latin alphabets with upper case, upper case Greek alphabet, custom alphabet, etc. A specific shift value can also be specified by users. An overview of Caesar cipher is present on the main interface and an example highlighting the encoding process. Now, follow the below steps.

How to perform Caesar cipher encoding online using ciphereditor.com:

Visit this website using the given link.
After that, enter the plain text in the text field.
Now, specify the key and choose a specific alphabet type.
Finally, view the encoded data in the ciphertext field that users can copy.

Additional Features:

This website offers multiple cipher tools based on Morse Code, RC4 Cipher, Letter Number Cipher, PGP Key Encryption, and Logical NOT.

Final Thoughts:

It is another simple and effective online Caesar cipher encoder website that supports multiple alphabet types and takes a custom shift value.

Pros	Cons
Supports multiple alphabet types
Can consider a custom shift value

Home Page

md5decrypt.net

md5decrypt.net is yet another free online Caesar cipher encoder website. This website can perform both Caesar cipher encoding and decoding operations. Along with input text, it also takes shift value as input at the time of encryption. In the case of decryption, users can use the standard decryption method or brute force to decode the data. It also explains what is Caesar cipher and provides a detailed cryptanalysis of the Caesar cipher. Now, check out the below steps.

How to perform Caesar cipher encoding online using md5decrypt.net:

Visit this website and access the Caesar cipher encoder and decoder tool.
After that, write or paste the text data in the input field.
Specify the shift value if you want.
Click on the Encode button to view the encoded ciphertext.

Additional Features:

This website comes with additional tools like ROT13 Decryption, Caesar Cipher Decryption, Letters Frequency Analysis, Vigenere Cipher Decryption, and more.

Final Thoughts:

It is another capable online Caesar cipher encoding website that can also decode data using Caesar cipher.

Pros	Cons
Can encode and decode data using Caesar cipher
Users can specify a custom shift value

Home Page

xarg.org

xarg.org is another free online Caesar cipher encoder website. This website offers a Caesar cipher decryption tool that can also be used to encrypt data. It allows users to choose a key from 1 to 26 for encryption. However, it doesn’t offer much information related to Caesar’s cipher. The process of using this tool is quite simple. Now, follow the below steps.

How to perform Caesar cipher encoding online using xarg.org:

Launch this website using the given link.
After that, write or paste the input text data.
Choose a specific key value.
Tap on the Encrypt button to view the encoded data.

Additional Features:

This website offers various tools and information related to a variety of topics.

Final Thoughts:

It is another simple and effective online Caesar cipher encoder website that can also decode data.

Pros	Cons
Can encode and decode data using Caesar cipher
Easy to use

Home Page

randommer.io

randommer.io is another free online Caesar cipher website. This website offers a wide range of random tools, including a Caesar Cipher encryption tool. This tool uses input text and key number data to encode a message. Plus, it supports Caesar cipher decoding. It also explains the workings of Caesar’s cipher and answers common questions related to this topic. Now, follow the below steps.

How to perform Caesar cipher encoding online using randommer.io:

Go to this website and access this tool.
Now, write or paste the text data.
Next, enter a key number.
Finally, choose the Encode option and tap on the Crack it button to encode the data.

Additional Features:

This website offers related hash services like MD5 Hash Generator, SHA1 Hash Generator, CRC32 Checksum Generator, Password Generator, and more.

Final Thoughts:

It is another capable online Caesar cipher encoder website that anyone can use without much hassle.

Pros	Cons
Can encode and decode data using Caesar cipher
Users can specify a custom key value

Home Page

calcont.in

calcont.in is another free online Caesar cipher website. This website explains Caesar cipher in brief and supports both encoding and decoding operations. At the time of encoding, users can also specify the shift number. An inbuilt decoding tool is also present that helps users decode the data using the Caesar cipher method. It also lists the uses of Caesar’s cipher encryption technique. Now, follow the below steps.

How to perform Caesar cipher encoding online using calcont.in:

Visit this website and access the Caesar cipher encoder/decoder.
Now, write or paste the text data that you want to encode.
Next, specify the shift key value.
In the end, choose the Encode action and click on the Convert button.

Additional Features:

This website also offers handy tools like Text Editor, Word Sorting, Grammar Corrector, Text to Image Converter, Language Identifier, and more.

Final Thoughts:

It is another simple online Caesar cipher encoding website that helps users encode sensitive data using Caesar cipher.

Pros	Cons
Can encode and decode data using Caesar cipher
Describes Caesar’s cipher and its uses

Home Page

crypto.interactive-maths.com

crypto.interactive-maths.com is the last free online Caesar cipher website. Through this website, users can quickly encode and decode data using Caesar Cipher. It also lets users add custom alphabets for the encryption. Along with custom alphabets, users can specify a shift key value before starting the encryption process. It also explains Caesar’s cipher encryption and decryption processes. Now, follow the below steps.

How to perform Caesar cipher encoding online using crypto.interactive-maths.com:

Go to this website and access the Caesar Shift Cipher.
After that, enter the alphabet that you want for the encryption and specify a shift key.
Next, submit the text data.
Finally, hit the Encrypt button to start the encryption process.

Additional Features:

This website offers multiple cipher tools based on Affine Cipher, Pigpen Cipher, Atbash Cipher, Polyalphabetic Substitution Cipher, and more.

Final Thoughts:

It is another good online Caesar cipher website that lets users specify custom alphabet and key values for the data encryption.

Pros	Cons
Can encode and decode data using Caesar cipher
Lets users customize alphabet
Users can specify a custom key value

Home Page

Frequently Asked Questions

What is the Caesar cipher method?

It's a substitution cipher, where each letter in the message is replaced with another letter a fixed number of positions down the alphabet. This fixed number is called the key. For example, with a key of 4, "A" becomes "E", "B" becomes "F", and so on.

What is the key 3 in the Caesar cipher?

Shifting by 3, When using a key of 3, each letter in your message will be shifted three positions forward down the alphabet. So, "A" becomes "D", "B" becomes "E", and so on.

What is a Caesar cipher cryptanalysis?

Caesar cipher cryptanalysis, also known as breaking the Caesar cipher, is the process of recovering the original message (plaintext) from its encrypted form (ciphertext) without knowing the secret key. Due to its simplicity, the Caesar cipher is notoriously weak and vulnerable to several cryptanalysis techniques.

Why is it called Caesar cipher?

The Caesar cipher is named after Julius Caesar, the famous Roman general and statesman, who supposedly used this simple encryption technique for his military dispatches.

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