Encoding & Number Bases

Drop a file to encode it as a Base64 data URI (for inline HTML/CSS), or paste a Base64 string to decode and download the original file.

Paste text to see its hex representation, or paste hex to decode it back to text. Supports space-separated and continuous hex formats.

Enter a number in any base (2, 8, 10, 16) and see it instantly converted to all other bases with step-by-step breakdown.

Type text and hear/see it in Morse code (dots and dashes). Paste Morse code to decode it back. Includes playback at adjustable speed.

Paste HTML or text and encode reserved characters to HTML entities. Supports named and numeric entities.

Drop a file to encode it as a Base64 data URI (for inline HTML/CSS), or paste a Base64 string to decode and download the original file.

Standard Base64 uses +, /, and = which are not URL-safe. This converter swaps them for -, _, and strips padding for URL-friendly strings.

Enter a number in any base (2, 8, 10, 16) and see it instantly converted to all other bases with step-by-step breakdown.

Paste text to see its hex representation, or paste hex to decode it back to text. Supports space-separated and continuous hex formats.

Convert any text to its binary representation (8 bits per character, space-separated), and decode binary strings back to readable text.

Enter any character or text and see its Unicode code point(s) and decimal/hex values. Supports emoji, CJK, and extended Unicode.

Paste HTML or text and encode reserved characters to HTML entities. Supports named and numeric entities.

Encode text with non-ASCII characters into Quoted-Printable format for email, or decode Quoted-Printable back to readable text.

Enter a Unicode domain name and get its Punycode form, or decode Punycode back to Unicode.

Type text and hear/see it in Morse code (dots and dashes). Paste Morse code to decode it back. Includes playback at adjustable speed.

Enter text and see exactly how it is encoded in UTF-8, byte by byte, with continuation byte flags, code point values, and bit-level detail.

Paste text and compress it with gzip to see the size reduction. Decompress gzipped content back to text.

Shift every letter by a fixed amount (ROT-N) — the classic substitution cipher. Includes a brute-force mode that tries all 25 shifts at once.

Each letter is shifted by a repeating keyword instead of a fixed amount — far stronger than a Caesar shift, and still fully solvable by hand.

A↔Z, B↔Y, C↔X: the ancient Hebrew cipher that mirrors the alphabet. Encoding and decoding are the same operation.

Write the text in a zigzag across a number of rails, then read it off row by row — a classic transposition cipher that scrambles letter order.

Francis Bacon's biliteral cipher hides each letter as a group of five As and Bs — the original steganographic encoding.

A general substitution cipher parameterized by two keys: multiplication by a (coprime to 26) plus an offset b.

Convert between text and Base32 (A–Z, 2–7) with optional = padding — case-insensitive decoding, safe for handwritten and spoken transmission.

Convert between text and Base58 — the encoding used for Bitcoin addresses, with 0, O, I, and l removed to avoid visual confusion.

Drop a file to encode it as a Base64 data URI (for inline HTML/CSS), or paste a Base64 string to decode and download the original file.

Paste text to see its hex representation, or paste hex to decode it back to text. Supports space-separated and continuous hex formats.

Enter a number in any base (2, 8, 10, 16) and see it instantly converted to all other bases with step-by-step breakdown.

Enter any character or text and see its Unicode code point(s) and decimal/hex values. Supports emoji, CJK, and extended Unicode.

Paste HTML or text and encode reserved characters to HTML entities. Supports named and numeric entities.

Standard Base64 uses +, /, and = which are not URL-safe. This converter swaps them for -, _, and strips padding for URL-friendly strings.

Type text and hear/see it in Morse code (dots and dashes). Paste Morse code to decode it back. Includes playback at adjustable speed.

Enter a Unicode domain name and get its Punycode form, or decode Punycode back to Unicode.

Encode text with non-ASCII characters into Quoted-Printable format for email, or decode Quoted-Printable back to readable text.

Enter text and see exactly how it is encoded in UTF-8, byte by byte, with continuation byte flags, code point values, and bit-level detail.

Paste text and compress it with gzip to see the size reduction. Decompress gzipped content back to text.

Convert any text to its binary representation (8 bits per character, space-separated), and decode binary strings back to readable text.

Shift every letter by a fixed amount (ROT-N) — the classic substitution cipher. Includes a brute-force mode that tries all 25 shifts at once.

Each letter is shifted by a repeating keyword instead of a fixed amount — far stronger than a Caesar shift, and still fully solvable by hand.

A↔Z, B↔Y, C↔X: the ancient Hebrew cipher that mirrors the alphabet. Encoding and decoding are the same operation.

Write the text in a zigzag across a number of rails, then read it off row by row — a classic transposition cipher that scrambles letter order.

Francis Bacon's biliteral cipher hides each letter as a group of five As and Bs — the original steganographic encoding.

A general substitution cipher parameterized by two keys: multiplication by a (coprime to 26) plus an offset b.

Convert between text and Base32 (A–Z, 2–7) with optional = padding — case-insensitive decoding, safe for handwritten and spoken transmission.

Convert between text and Base58 — the encoding used for Bitcoin addresses, with 0, O, I, and l removed to avoid visual confusion.