Cryptography Tools – Small Tools. Big Help.

Welcome to SmallToolsOnline.com — your go-to toolkit for working with cryptography and data security quickly and efficiently. Our collection of smart browser-based cryptography tools helps you encrypt, decrypt, hash, encode, and decode data instantly — all without installing any software or sending your information anywhere.

From simple MD5 and SHA hash generators to advanced Base64 encoders, ciphers, and password generators, every tool runs directly in your browser using fast JavaScript processing.

Whether you're a developer testing data integrity, a student learning encryption basics, or a security professional verifying encoded content — Small Tools Online helps you do it faster, smarter, and safer.

All Cryptography Tools

AES
AES Encrypt/Decrypt
Encrypt or decrypt text using AES algorithm.
RSA
RSA Key Generator
Generate RSA public/private key pairs entirely in browser.
Diffie-Hellman Key Exchange
Simulate shared secret creation in browser.
SHA256
Hash Calculator
Calculate MD5, SHA-1, SHA-256 hashes in browser.
HMAC
HMAC Calculator
Compute HMAC with secret key in browser.
XOR Encrypt/Decrypt
Apply XOR encryption to text data in browser.
ROT47
ROT47 Encode/Decode
Encode or decode data with the ROT47 cipher.
Entropy Calculator
Compute Shannon entropy of text data.
P@55
Generate Random Password
Generate secure random passwords client-side.
Base32
Base32 Encode/Decode
Encode or decode data using Base32 alphabet.
Base58
Base58 Encode/Decode
Encode or decode using Base58 encoding (e.g., Bitcoin alphabet).
Base85
Base85 Encode/Decode
High-efficiency Base85 encoding/decoding.
BF
Blowfish Encrypt/Decrypt
Encrypt or decrypt text using Blowfish algorithm.
TF
Twofish Encrypt/Decrypt
Encrypt or decrypt text using Twofish algorithm.
3DES
DES/Triple DES Encrypt/Decrypt
Encrypt or decrypt text using DES or 3-DES algorithms.
HASH+
Hash Function Explorer
Explore advanced hash algorithms (SHA-3, RIPEMD, etc) in browser.
CRT
Certificate Viewer/Validator
View and validate X.509 certificates locally in browser.
TOTP
TOTP Generator/QR
Generate time-based one-time passwords with QR codes.
Random Number / Prime Generator
Generate cryptographically-secure random numbers and primes.
PW?
Password Strength & Entropy Checker
Analyze password strength and entropy client-side.