Base64 Encode / Decode
Encode and decode Base64, UTF-8 safe.
Encode / Decode
Base64, URL, JWT, hex & other encodings.
URL Encode / Decode
Percent-encode and decode URLs and query params.
JWT Decoder
Inspect JWT header, payload & claims.
Hex / Text / Binary Converter
Convert text to hex or binary and back.
Base32 Encode / Decode
Encode and decode Base32 (RFC 4648).
HTML Entity Encode / Decode
Escape and unescape HTML entities.
Morse Code Translator
Translate text to Morse code and back.
Unicode Character Inspector
Inspect code points, decimals and UTF-8 bytes.
Adler-32 Checksum
Compute the zlib Adler-32 checksum of text or hex.
Ascii85 Encoder Decoder
Encode and decode Ascii85 (Base85) text.
Atbash Cipher
Encode and decode text with the mirror-alphabet cipher.
Bacon Cipher
Encode and decode Francis Bacon’s A/B cipher.
Base58 Encoder Decoder
Encode and decode Base58 (Bitcoin/IPFS alphabet).
Base64 to Hex
Decode Base64 and view the bytes as hexadecimal.
Base91 Encoder Decoder
Encode and decode basE91, denser than Base64.
Binary to Decimal Converter
Turn binary into decimal instantly.
Caesar Cipher
Encrypt and decrypt text with a shift cipher.
CRC32 Checksum
Compute a CRC32 checksum in hex and decimal.
Hex Dump Viewer
See text as a classic hexdump with ASCII gutter.
JWT Generator HS256
Sign a JWT with HMAC-SHA256 in your browser.
Numeronym Generator
Turn long words into numeronyms like i18n and a11y.
Octal Converter
Convert octal to decimal, binary and hex instantly.
Punycode Converter
Convert IDN domains to and from xn-- Punycode.
Quoted-Printable Encoder
Encode and decode quoted-printable (RFC 2045) text.
Rail Fence Cipher
Encrypt and decrypt with the zig-zag transposition cipher.
SHA-3 Hash
SHA3-224/256/384/512 hashes in your browser.
Unicode Escape Converter
Convert text to \uXXXX escapes and back.
UTF-8 Byte Inspector
See how text becomes UTF-8 bytes, character by character.
Vigenere Cipher
Encrypt and decrypt with a keyword.
XOR Cipher
Encrypt and decrypt text with a repeating-key XOR.
About Encode / Decode
Encode and decode the formats developers hit every day: Base64 and Base32, URL percent-encoding, JWT tokens, hex, binary, HTML entities, Morse and ROT13. Every conversion happens locally in your browser — which is exactly what you want when the string being decoded is a session token, an API credential or anything else that should not be pasted into a stranger's server. The JWT decoder shows header, payload and expiry claims at a glance without sending the token anywhere; the Base64 tools are UTF-8 safe so emoji and accented characters round-trip correctly; the URL encoder handles full URLs and individual query parameters. Paste, convert, copy — no accounts, no limits, no network requests.