Online Crypto Tools

World's simplest crypto utilities

Online crypto tools is a collection of useful browser-based cryptography utilities. All crypto tools are simple, free and easy to use. There are no ads, popups or other garbage, just crypto utilities that work right in your browser. And all utilities work exactly the same way — load the data, encrypt the result. Created by team Browserling.

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All crypto tools

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ROT-13 Encode Data

Quickly encrypt data using the ROT13 substitution cipher.

ROT-13 Decode Data

Quickly decrypt data that was encrypted with ROT13.

ROT-47 Encode Data

Quickly encrypt data using the ROT47 substitution cipher.

ROT-47 Decode Data

Quickly undo ROT47 encryption and find the original message.

Analyze Letter Frequency

Quickly count letters in the given text and print their distribution.

Analyze Word Frequency

Quickly count words in the given text and print their distribution.

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ROT-2 Encrypt/Decrypt

Encrypt and decrypt numbers using ROT2 cypher.

ROT-5 Encrypt/Decrypt

Encrypt and decrypt numbers using ROT5 cypher.

ROT-n Encrypt/Decrypt

Encrypt and decrypt numbers using custom ROT cypher.

Base26 Encode/Decode

Encode and decode data to/from base26 encoding.

Base32 Encode/Decode

Encode and decode data to/from base32 encoding.

Base58 Encode/Decode

Encode and decode data to/from base58 encoding.

Base62 Encode/Decode

Encode and decode data to/from base62 encoding.

Base64 Encode/Decode

Encode and decode data to/from base64 encoding.

ASCII85 Encode/Decode

Encode and decode data to/from ASCII85 encoding.

XOR Encrypt/Decrypt

Encrypt and decrypt data using the XOR algorithm.

AES Encrypt/Decrypt

Encrypt and decrypt data using the AES algorithm.

RC2 Encrypt/Decrypt

Encrypt and decrypt data using the RC2 algorithm.

RC4 Encrypt/Decrypt

Encrypt and decrypt data using the RC4 algorithm.

RC5 Encrypt/Decrypt

Encrypt and decrypt data using the RC5 algorithm.

RC6 Encrypt/Decrypt

Encrypt and decrypt data using the RC6 algorithm.

Akelarre Encrypt/Decrypt

Encrypt and decrypt data using the Akelarre algorithm.

Ake98 Encrypt/Decrypt

Encrypt and decrypt data using the Ake98 algorithm.

DES Encrypt/Decrypt

Encrypt and decrypt data using the DES algorithm.

Triple DES Encrypt/Decrypt

Encrypt and decrypt data using the 3DES algorithm.

Rabbit Encrypt/Decrypt

Encrypt and decrypt data using the Rabbit cipher.

Blowfish Encrypt/Decrypt

Encrypt and decrypt data using the Blowfish cipher.

Twofish Encrypt/Decrypt

Encrypt and decrypt data using the Twofish cipher.

KASUMI Encrypt/Decrypt

Encrypt and decrypt data using the KASUMI cipher.

Serpent Encrypt/Decrypt

Encrypt and decrypt data using the Serpent cipher.

Solitaire Encrypt/Decrypt

Encrypt and decrypt data using the Solitaire cipher.

Break a Substitution Cipher

Decode text encrypted with a simple substitution cipher.

Generate Random Numbers

Print a list of random numbers.

Generate Primes

Print a list of prime numbers.

Generate Twin Primes

Print a list of twin prime numbers.

Generate Cousin Primes

Print a list of cousin prime numbers.

Generate Prime Triplets

Print a list of prime triplets.

Generate Random Primes

Print a list of random prime numbers.

Check Prime Numbers

Check if the given numbers are prime numbers.

Create Random Passwords

Generate one or more random passwords.

Replace Message Alphabet

Rewrite the given message with a new alphabet.

Calculate Text Entropy

Compute the Shannon entropy of the given message.

Generate High Entropy Data

Create text with high Shannon entropy.

Generate Low Entropy Data

Create text with low Shannon entropy.

Analyze Random Data

Perform statistical analysis of random data.

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Created with love by

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@browserling

We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make developers' lives easier, so we created this collection of online cryptography tools. Unlike many other tools, we made our tools free, without ads, and with the simplest possible user interface. Our online crypto tools are actually powered by our programming tools that we created over the last couple of years. Check them out!

Secret message

If you love our tools, then we love you, too! Use coupon code CRYPTOLING to get a discount at Browserling.

All conversions and calculations are done in your browser using JavaScript. We don't send a single bit about your input data to our servers. There is no server-side processing at all. We use Google Analytics and StatCounter for site usage analytics. Your IP address is saved on our web server, but it's not associated with any personally identifiable information. We don't use cookies and don't store session information in cookies. We use your browser's local storage to save tools' input. It stays on your computer.

By using Online Crypto Tools you agree to our Terms of Service. TLDR: You don't need an account to use our tools. All tools are free of charge and you can use them as much as you want. You can't do illegal or shady things with our tools. We may block your access to tools, if we find out you're doing something bad. We're not liable for your actions and we offer no warranty. We may revise our terms at any time.