Crypto - Encryption Tools

Contains adsIn-app purchases
4.3
1.92K reviews
1L+
Downloads
Content rating
PEGI 3
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About this app

Crypto - The unique cryptography app with numerous & useful features
Suitable for learning, testing & applying.

Explore cryptography - the magic behind cryptocurrencies like Bitcoin or Ethereum. Now with Blockchain related features. More coming soon!

Features
• Encryption
• Hashing
• Encoding/Decoding
• Mathematical functions
• Secure Communication Tools (Certificates & Key Exchange)
• Analysis
• Tools

This makes Crypto unique:
• Beautiful & modern Material Design
• Useful implemented features
• Info pages for a lot of functions (implementation details etc.)
• Sharing/Copy-pasting your texts & content made very easy & powerful
• Save frequently used functions as favorites
• Powerful Secure Communication Tools as an approach to provide secure encryption as a security add-on for every untrusted messaging or email service

Tools
Ciphers
• Caesar
• Vigenère
• Skytale
• Enigma
• DES
• 3DES
• AES
• Blowfish
• Twofish
• Serpent
• IDEA
• RC6
• RC4
• Salsa20
• ChaCha

Cryptanalysis
• Frequency Analysis
• Caesar Brute Force
• Factorization

Mathematics
• Primality Test (Fermat, Miller Rabin)
• Greatest Common Divisor & Multiplicative Inverse in a Field
• Euler's Totient Function
• Prime Search
• Find Divisors

Asymmetric Methods
• RSA
• Diffie Hellman
• DSA
• El Gamal

Hash & HMAC
• MD2
• MD4
• MD5
• RIPEMD
• SHA-1
• SHA-2
• SHA-3
• Tiger
• Whirlpool
• Gost3411

MAC - Message Authentication Code
• Skein
• Poly1305
• CMAC

KDF - Key Derivation Function
• HKDF
• Scrypt

Encoding/Decoding
• Base64
• Base58
• Hexadecimal
• Binary
• URL
• Morse Code

Other tools
• PEM Decoder
• RSA Modulus Converter
• QR Code Generator
• QR Code Decoder
• Advanced Base64 Encoding/Decoding
• Bitcoin Address Generator

Secure Communication Tools
• Certificates (RSA)
• Key Exchange (RSA Public Key Block Cipher Encryption)
• Signature (RSA/SHA256)
• Text Encryption (AES-256/GCM)
• File Encryption (AES-256/GCM)


Feedback
If you have any problems, suggestions or questions, please email to [email protected]
Updated on
31 Aug 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.3
1.85K reviews
Grant Matler
20 September 2025
Was originally good, now too many long unskippable ads wasting my time. Uninstalling
1 person found this review helpful
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Vittorio Basile
31 July 2022
It is the best suite of cryptographic tools you can find on Google Play Store. It does far more than I need it for (mostly encrypting files to do encrypted backups on my file server). But it has some issues. For example rotating the screen on some pages rotates the app and then it crashes immediately, no matter how many times you do it, it ALWAYS crashes. Also in the send feedback page, if I press the send feedback button nothing happens.
29 people found this review helpful
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David Swanson
25 June 2025
Downloaded to test it and it seems to be a good app but the ads are ridiculous. They are full page ads. You can't do anything without a full page ad popping up. I click RSA to see what it's about, full page ad. The ads have timers on them. You have to close the app and start over. You click on another button, full page ad. Can't even test it so goodbye app!
2 people found this review helpful
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What's new

v5.6.1
• Technical maintenance
• Bugfixes