Encode / Decode

29 free online Encode / Decode tools that run entirely in your browser.

Base64 Encoder

Encode text to Base64.

Base64 Decoder

Decode Base64 back to text.

URL Encoder

Percent-encode text for URLs.

URL Decoder

Decode percent-encoded URLs.

HTML Encoder

Escape HTML entities.

HTML Decoder

Decode HTML entities to text.

Hex Encoder

Convert text to hexadecimal.

Hex Decoder

Convert hexadecimal back to text.

Binary Encoder

Convert text to binary.

Binary Decoder

Convert binary back to text.

ROT13 Cipher

Apply the ROT13 letter substitution.

Morse Code Translator

Translate text to and from Morse code.

Base32 Encoder

Encode text to Base32 (RFC 4648).

Base32 Decoder

Decode Base32 back to text.

Base58 Encoder

Encode text to Base58 (Bitcoin alphabet).

Base58 Decoder

Decode Base58 back to text.

Base64 to Hex

Convert Base64 to hexadecimal.

Hex to Base64

Convert hexadecimal to Base64.

Punycode Encoder

Convert a Unicode domain to Punycode (IDN / xn--).

Punycode Decoder

Convert a Punycode (xn--) domain back to Unicode.

ROT47 Encoder

Encode or decode text with ROT47 (self-inverse).

Caesar Cipher

Shift letters by a fixed amount (classic Caesar cipher).

Atbash Cipher

Mirror the alphabet (A to Z) — self-inverse cipher.

Vigenère Cipher

Encode or decode with a keyword-based Vigenère cipher.

XOR Cipher

XOR text with a key; output as hex.

Base36 Encoder

Encode text to a compact Base36 string.

Base36 Decoder

Decode a Base36 string back to text.

Base64URL Encoder

Encode text to URL-safe Base64 (no padding).

Base64URL Decoder

Decode URL-safe Base64 back to text.