Online Encoders, Decoders & Classical Cipher Tools
Convert between text, binary, hex, Base64, and ciphers. Features our smart multi-decoder that automatically tests multiple algorithms and ranks readable results.
Available Tools in Encoders & Decoders (17)
Online Encoders, Decoders & Classical Cipher Tools
Convert between text, binary, hex, Base64, and ciphers. Features our smart multi-decoder that automatically tests multiple algorithms and ranks readable text.
Base64 Decoder
Decode Base64 strings to UTF-8 text, files, and images instantly. Fully private client-side decoder supporting URL-safe and standard Base64 encoding.
Base64 Encoder
Encode plain text, binary files, and media to Base64 or Data URIs. Safe client-side Base64 encoding with URL-safe variant and instant copying.
Base64 to Image Converter
Convert Base64 strings and Data URIs to downloadable PNG, JPG, and SVG images. Instant client-side visual preview with zero server uploads.
Image to Base64 Converter
Convert PNG, JPG, SVG, and WEBP image files into Base64 Data URI strings for HTML, CSS, and API embedding with zero server transmission.
Base32 Decoder & Encoder
Decode and encode RFC 4648 Base32 strings online. Handles 2FA TOTP secret keys and Crockford Base32 variants with complete client-side security.
Hex Encoder & Decoder
Convert plain text to hexadecimal numbers and decode hex strings back to readable UTF-8 text with custom delimiters. Fast and 100% private.
Binary Code Translator
Convert plain text into 8-bit binary numbers (0s and 1s) and decode binary code back to text with custom spacing. Real-time client-side translator.
URL Encode & Decode
URL-encode or decode text and parameters using standard percent-encoding (encodeURIComponent) with UTF-8 support. Safe in-browser parameter tool.
ASCII Table
Interactive ASCII table showing decimal, hex, octal, binary, and HTML entity representations for all 128 standard ASCII character codes.
ROT13 & Caesar Cipher
Encode and decode ROT13 text or test all 25 Caesar cipher shifts simultaneously with instant text preview. Classic letter rotation cipher tool.
Morse Code Translator
Translate text to Morse code and Morse code back to text with audio playback, light flasher preview, and ITU international standard code tables.
Multi-Decoder
Paste any encoded text: automatically tries Base64, Hex, Binary, ROT13, Morse, and Base32, ranking intelligible results by English word probability.
Cipher Identifier
Analyze mystery text with Index of Coincidence, charset heuristics, and frequency analysis to suggest probable ciphers and decoding strategies.
Letter to Number Cipher
Convert letters to their alphabet numbers (A=1, B=2, Z=26) and decode number sequences back to text. Customize delimiters and numbering offsets.
JWT Decoder
Decode JSON Web Tokens (JWT) into readable header, payload, and claims without sending tokens to any remote server. Inspect expiration dates safely.
Bcrypt Hash Generator & Verifier
Generate secure bcrypt hashes with configurable salt rounds and verify plaintext passwords against bcrypt hashes directly in your browser runtime.