Encrypt files & messages — nothing ever leaves your browser
Free cryptography tools including post-quantum encryption (Kyber, Dilithium) — no account, no uploads, no tracking
Online Encryption Services
Protect any file or message with AES-256 encryption in seconds. Everything runs in your browser — no files uploaded, no passwords stored. Fast, private, and completely free.
Security tools for developers & professionals
SSL checker, password generator, WHOIS lookup, IP location, hash functions and more — everything a security professional needs, free and in one place.
Prefer offline? Download the free desktop app
Encrypt any file on your PC without an internet connection. Fully compatible with files encrypted on the web — same AES algorithm, same security.
File Encrypted
Country
Giga Byte Encrypted
Built for the post-quantum era
Current encryption (RSA, ECC) will be broken by quantum computers. KF-Cipher gives you free access to the next generation of cryptography — standardized by NIST and ready to use today.
🔐 Kyber (ML-KEM)
NIST-standardized post-quantum key encapsulation. Generate key pairs, encrypt and decrypt — quantum-safe.
Try Kyber →✎ Dilithium Signature
Post-quantum digital signatures. Sign and verify messages with a quantum-resistant algorithm.
Try Dilithium →⚡ Quantum Attack Simulator
See how a quantum computer would break RSA and ECC — and why you need to upgrade now.
Try Simulator →Services
Check our Services
Protect your Files
Encrypt any file type with AES-128/192/256 using Password-Based Encryption (PBE), HMAC and CBC mode.
File Decrypt
Decrypt files encrypted with the KF-Cipher AES encryption service to restore the original content.
Text Message Encryption
Encrypt text messages with AES + HMAC-PBKDF2 and CBC mode for strong symmetric encryption.
ChaCha20-Poly1305
Modern authenticated stream cipher used in TLS 1.3. Encrypt and decrypt text online.
Steganography Tool
Hide secret messages inside PNG images (LSB encoding) or plain text (zero-width characters) — 100% client-side, nothing uploaded.
Kyber (ML-KEM)
NIST FIPS 203 — Generate a Kyber key pair, encapsulate a shared secret and decrypt. Quantum-resistant key exchange.
Dilithium Signature
NIST FIPS 204 — Post-quantum digital signatures. Sign and verify messages using ML-DSA (Dilithium).
SPHINCS+ Signature
NIST FIPS 205 — Hash-based post-quantum signatures. The most conservative PQC signature scheme.
Quantum Attack Simulator
Simulate Shor's algorithm attacking RSA and ECC. Visualise why you need to migrate to post-quantum now.
PQ Readiness Checker
Analyse your domain's cryptographic configuration for quantum vulnerability — TLS, certificates and ciphers.
HQC (Code-Based KEM)
NIST's selected backup KEM — a code-based key encapsulation mechanism, mathematically independent from Kyber's lattice approach.
Falcon (FN-DSA) Signature
NIST FIPS 206 (draft) — the most compact post-quantum signature scheme, ideal for bandwidth-constrained certificates and protocols.
Hybrid KEM Simulator
Combine classical X25519 with post-quantum Kyber into one hybrid session key — see real-world TLS 1.3 hybrid mode in action.
Composite Signature Tool
Sign with both ECDSA and ML-DSA at once — the composite is only valid if both verify, doubling forgery resistance during migration.
TLS Hybrid Handshake Inspector
Send a real TLS 1.3 ClientHello to any live site and see whether it already negotiates a hybrid post-quantum key exchange group.
CBOM Generator
Paste code and get an instant Cryptography Bill of Materials — flags RSA, ECDSA, MD5, DES and other quantum-vulnerable algorithms.
Migration Cost Estimator
Answer a few questions about your infrastructure and get a directional effort tier and timeline for your PQC migration.
PQC Certificate Generator
Generate a self-signed X.509 certificate signed with ML-DSA instead of RSA or ECDSA — test your stack before CAs offer PQC issuance.
Harvest Now, Decrypt Later Calculator
Apply Mosca's theorem to see if your long-lived data is already at risk from adversaries recording ciphertext today.
PQC Standards Tracker
Live status board for every NIST PQC algorithm — what's final, draft, selected or still under evaluation.
RSA Encryption
Generate RSA key pairs (1024-4096 bit), encrypt and decrypt text using PKCS#1 v1.5 online.
ElGamal Encryption
Generate ElGamal key pairs (1024-4096 bit), encrypt and decrypt text using the discrete-log cryptosystem.
ECC Encryption
Elliptic Curve Cryptography on P-256, P-384 or P-521. Generate key pairs, encrypt and decrypt text.
SSL/TLS Certificate Checker
Inspect any domain's SSL certificate — issuer, expiry, cipher suite, TLS version and HSTS status.
HMAC Generator
Generate HMAC authentication codes with SHA-256, SHA-384, SHA-512 and other algorithms.
JWT Decoder
Decode and inspect JSON Web Tokens — header, payload, signature, algorithm and expiry claims.
CSR Generator
Generate Certificate Signing Requests (CSR) and RSA key pairs for SSL/TLS certificate issuance.
RSA Key Analyzer
Analyse any RSA public key — key size, classical and quantum security level, crack-time estimate and migration advice.
Digital Signature Verifier
Verify RSA-PSS, ECDSA P-256/P-384 and Ed25519 digital signatures with auto algorithm detection.
Cipher Identifier
Identify the algorithm behind any cipher text — detects AES, RSA, Base64, Hex, JWT and more.
Algorithm Comparison
Interactive comparison of AES, RSA, ECC, Kyber, Dilithium, SPHINCS+ by key size, speed and quantum safety.
Cipher Analysis Tool
Analyse cipher text for vulnerabilities across AES-128/192/256, DES, 3DES, Twofish and Serpent.
Classical Ciphers
Encrypt, decrypt and brute-force Caesar, Vigenere, Atbash, ROT13, Rail Fence and Morse code.
Frequency Analysis Visualizer
Analyse letter frequency in ciphertext and solve substitution ciphers interactively, with a live decoded preview.
Avalanche Effect Visualizer
Change one character and watch roughly half the bits of a SHA-256 hash flip — the avalanche effect, live.
Cryptography Fundamentals Assessment
100 questions spanning classical ciphers through post-quantum cryptography, with instant scoring and full review.
Modular Arithmetic Trainer
Practice modular reduction, exponentiation, GCD and modular inverses — the math foundation behind RSA.
Build RSA by Hand
Pick your own primes, derive your own RSA keys, and encrypt your own message — a guided, checked lab.
Brute-Force Time Estimator
See real time-to-crack estimates for passwords and keys, classically and with Grover's quantum algorithm.
Spot the Bug: Code Review Challenges
12 real-world code snippets, each with one cryptographic vulnerability to find — with fixes explained.
Enigma Machine Simulator
A historically accurate Enigma simulator with real rotor wiring, ring settings, plugboard and stepping mechanics.
IP Location Finder
Find the geographic location, ISP, timezone and coordinates for any IP address with an interactive map.
Whois Lookup
Full Whois data for any domain — registrar, creation date, nameservers and registration status.
Password Generator
Generate strong random passwords with configurable length, symbols and complexity requirements.
Password Strength Checker
Measure password entropy, identify weaknesses and get improvement recommendations.
Cryptography Courses
Best cryptography courses from Stanford, Coursera and edX — free and paid, beginner to advanced.
Cryptography Organizations
Curated links to IACR, NIST, CACR, OpenSSL and other authoritative cryptography organisations.
Free Tutorials
100% free cryptography and encryption tutorials from GeeksForGeeks, Khan Academy and top tech sites.
Cybersecurity Books
Handpicked cryptography books from O'Reilly, Springer, Wiley, Packt and Apress.
Contact
Contact Us
Email Us
info@kfcipher.net
Support@kfcipher.net