All Secret Tools Tools
40 free secret tools tools, no registration or login required, ready to use
🔐 About Secret Tools
Our cryptography tools collection provides professional online encryption and decryption tools, including MD5, SHA, Base64, AES, RSA, Morse code, and various other encryption algorithms. Supporting multiple symmetric and asymmetric encryption methods, all calculations are performed locally in the browser, protecting your data security.
Random Password Generator
Generate strong passwords with customizable length and character sets (digits, uppercase/lowercase letters, symbols), supports batch generation
Password Strength Checker
Multi-dimensional analysis of password complexity and entropy, with estimated crack time and improvement suggestions
Breach Database Check
Check online whether a password appears in known public credential stuffing databases (privacy-protected via k-Anonymity)
MD5 Hash
Generate a 128-bit hash value, commonly used for file integrity verification or quick fingerprinting
SHA-256/224 Hash
A highly secure 256-bit digest, a core algorithm for digital signatures and blockchain
SM3 National Cipher Digest
Standard of China's State Cryptography Administration, suitable for domestic security and government application scenarios
HMAC Authentication
Keyed-hash authentication based on MD5/SHA, used to verify message integrity and sender identity signature
AES Encryption/Decryption
Industry-grade Advanced Encryption Standard, supporting CBC, CFB, CTR, OFB, and ECB modes
DES Encryption
Traditional symmetric encryption standard, using single-length key mode, mostly for compatibility with legacy systems like power grids
TripleDES Encryption
Triple Data Encryption with three-key mode, more secure than DES, commonly used in financial systems
RC4 Classic Encryption
Stream symmetric encryption, suitable for legacy system compatibility due to its simple structure
Rabbit High-Speed Encryption
High-performance 128-bit stream algorithm optimized for software execution speed, with significantly higher security than RC4
SM4 Block Cipher (China National Standard)
Domestic symmetric encryption standard, widely used in e-government and domestic financial systems
RSA Toolkit
Supports key pair generation, public/private key encryption/decryption, and digital signing & verification
SM2 Asymmetric Cipher (China National Standard)
Domestic elliptic curve cryptography algorithm, covering encryption/decryption, signing, and key exchange
JWT Debugger
Supports JWT token decoding, signature verification, and token generation simulation
Base64 Converter
Supports Standard, URL Safe, and other modes, covering text & image (DataURL) conversion
Base58 (BTC)
Common encoding in Bitcoin, removing confusing characters like 0, O, I, l for better readability
Base16 (Hex)
Hexadecimal encoding using 0-9 and A-F, commonly used for viewing raw binary data, hash values, and color codes
Base32 (OTP)
Uses 32 case-insensitive characters, excluding confusing digits, widely used for Google Authenticator (2FA) keys
Base62 (ShortURL)
Composed of 0-9, a-z, A-Z with no special symbols, the preferred scheme for short URL generation and database ID compression
Base85 (Ascii85)
High-efficiency encoding scheme, more space-efficient than Base64, mainly used in PDF file storage and Git binary patches
Hex / Hexadecimal
Bidirectional conversion between raw binary streams and hex strings, supporting various delimiter formats
Unicode / UTF-16
Handles precise mapping conversion between UTF-8, UTF-16LE/BE, and Latin1 encodings
Punycode Domain
Converts non-ASCII domain names (e.g., Chinese) into browser-recognizable xn-- encoding
Quoted-printable
Common encoding for email transmission, converting non-ASCII characters into printable =XX format
HTML Entity Converter
Escapes special symbols (e.g., <) to prevent XSS attacks or display errors
Caesar Cipher
The classic shift cipher, supports custom offset and one-click brute-force cracking
Affine Cipher
Linear mathematical transformation encryption, a generalized mathematical form of the Caesar cipher
Vigenère Cipher
Polyalphabetic substitution cipher using a keyword as the key, strong resistance to frequency analysis
Rail Fence Cipher
A transposition cipher that changes letter order, creating a unique zigzag pattern
Polybius Square Cipher
Coordinate encryption based on a 5x5 grid, converting letters to row/column numbers
Morse Code
Bidirectional conversion between text and dot-dash (.-), supports real-time audio playback in browser
Bacon's Cipher
A unique encryption method that steganographically hides binary (A/B) within text
ROT13
A special Caesar cipher where encryption and decryption are identical, often used to hide spoilers
Keyboard Cipher
Encryption based on keyboard physical position offsets, popular in geek circles
Enigma Simulator
Simulation of WWII German mechanical encryption machine, with deep configurability for rotors and plugboard
Zero-Width Character Hiding
Embeds watermarks into plain text using invisible characters, preventing screenshots and tracing
Buddha Encryption
A classic Buddhist-style obfuscation tool that converts text into phrases like 'Thus Have I Heard'
Moe Talk / Nyan Talk
Fun conversion tool that encrypts content into 'meow~ awoo' sounds or specific anime-style symbols