Hex Tools

Convert a number in any base from 2 (binary) to 36 into its hexadecimal representation.

Convert plain ASCII text to space-separated uppercase hex bytes, one pair per character.

Decode a Binary-Coded Decimal (BCD) binary string back into its hexadecimal value.

Convert a big-endian hex value into its little-endian byte order.

Convert a binary value into its uppercase hexadecimal representation.

Encode every character of your text as a real, standard hexadecimal HTML/XML character reference.

Convert CMYK percentages (cyan, magenta, yellow, key/black) into a #RRGGBB hex color.

Generate a random hex value with a custom length, case, prefix, and digit grouping.

Convert a decimal integer into its hexadecimal representation, of any size.

Take every 2nd digit of a DoubleHex string to recover the original hex string.

Reverse this site's FakeHex letter cipher back to the original hex string, exactly.

Convert a decimal float into C99/printf %a hexfloat notation, exactly, with no rounding.

Encode a decimal float as its raw IEEE-754 bit pattern in hex (32-bit or 64-bit).

Decode a binary Gray code string back into its original hexadecimal value.

Double each HalfHex digit's value back toward hex, a best-effort (not exact) inverse.

Add two hexadecimal numbers together and get the exact hex sum.

Generate an NxN addition table with row/column headers and cell values all in hexadecimal.

Compute the bitwise AND of two hexadecimal values, digit by digit.

Convert one continuous hex string, strictly two digits per byte, into a downloadable binary file.

Invert a #RRGGBB hex color channel-by-channel (255 - value), with a before/after swatch comparison.

Convert a #RRGGBB hex color into CMYK (cyan, magenta, yellow, key/black) percentages.

Convert a #RRGGBB hex color into HSL (hue, saturation, lightness) values.

Convert a #RRGGBB hex color into HSV (hue, saturation, value/brightness) values.

Convert a #RRGGBB hex color into CIE L*a*b* (D65) values via the full sRGB->XYZ->Lab pipeline.

Convert a 6-digit #RRGGBB hex color into an rgb(r, g, b) CSS value, no alpha channel.

Convert a #RRGGBB or #RRGGBBAA hex color into an rgba(r, g, b, a) CSS color value.

Render every individual digit of any hex string in a distinct cycling rainbow color for readability.

Decrement every individual digit in a hex list by N, wrapping around modulo 16.

Repeat every digit of a hex value a set number of times in place.

Pull out a single hex digit from a value by its 0-based position, counted from the left.

Increment every individual digit in a hex list by N, wrapping around modulo 16.

Remove every occurrence of a chosen digit character from a whole list of hex values.

Find and replace one hex digit character with another across a whole list of hex values.

Sort each hex value's own digits, ascending or descending, independently per value.

Divide one hexadecimal number by another and get the exact hex quotient and remainder.

Generate an NxN division table showing hex quotient and remainder for every row/column pair.

Upload a file or paste text and edit its raw bytes directly in a classic three-column hex editor.

Reverse the byte order of a hex string, swapping between little-endian and big-endian layout.

Generate a full rows x columns ASCII hex grid, each cell labeled with its sequential hex index.

Decode hexadecimal HTML/XML character references (&#xHHHH;) back to their original characters.

Multiply two hexadecimal numbers together and get the exact hex product.

Generate an NxN multiplication table with row/column headers and cell values all in hexadecimal.

Compute the bitwise NAND of two hexadecimal values, digit by digit.

Reverse the order of a hex value's individual digits, distinct from byte-level endianness swaps.

Deterministically rotate the individual hex digits of a value by a chosen number of positions.

Randomly shuffle the individual hex digits of a value using cryptographically secure randomness.

Compute the bitwise NOR of two hexadecimal values, digit by digit.

Apply the NOT logic gate to a hexadecimal value, flipping every bit within its own width.

Analyze a hex value's decimal equivalent, bit length, digit frequency, palindrome status, and popcount.

Render each whole hex number in a whitespace/comma separated list in a distinct cycling color.

Flip every bit of a hexadecimal number, a quick way to compute its bitwise complement.

Combine a list of hex numbers, one per line or space-separated, into a single hex string.

Round every hex value in a list to the nearest multiple of a hex rounding unit.

Spell out a hex number digit by digit in English, using standard hex digit names for A-F.

Split one hex string into fixed-size chunks, one chunk per output line.

Compute the bitwise OR of two hexadecimal values, digit by digit.

Generate a run of consecutive hex values from a start value, with custom separator and padding.

Arrange consecutive hex values into a square ASCII grid, filled in clockwise spiral order.

Subtract one hexadecimal number from another and get the exact hex difference, including negative results.

Convert a hexadecimal number into any output base from 2 (binary) to 36.

Decode space-separated or contiguous hex bytes back into 7-bit ASCII text.

Convert a hexadecimal value into Binary-Coded Decimal (BCD), one 4-bit nibble per decimal digit.

Convert a hexadecimal value into binary, preserving each digit's exact 4-bit pattern.

Convert a hexadecimal value into its exact decimal number, with no precision loss.

Duplicate every digit of a hex string to produce this site's own invented DoubleHex format.

Substitute each hex digit for a letter using this site's own fixed FakeHex cipher table.

Decode a raw IEEE-754 hex bit pattern (8 or 16 hex digits) back into its decimal float value.

Convert a hexadecimal value into its binary reflected Gray code representation.

Halve every hex digit's numeric value to produce this site's own invented, lossy HalfHex format.

Turn a hex byte dump of an image file into a live preview and downloadable file.

Interpret a hex bit pattern as a fixed-width signed or unsigned integer.

Turn 8 raw hex digits into a readable dotted-quad IPv4 address like 192.168.1.1.

Turn 32 raw hex digits into a colon-separated IPv6 address, plus its RFC 5952 compressed form.

Convert a plain hexadecimal string of any length into its decimal magnitude.

Convert a hexadecimal value into its octal (base-8) representation.

Convert a hexadecimal value (1-3999 in decimal) into its standard Roman numeral.

Convert a hexadecimal number into unary notation, a repeated symbol shown that many times.

Decode hex bytes as UTF-8 text, correctly handling multi-byte characters and invalid sequences.

Subtract a decimal amount from every hex value in a list, clamping at zero instead of wrapping.

Add a decimal amount to every hex value in a list, using exact BigInt arithmetic.

Left-pad every hex value in a list with zeros to a fixed digit width.

Cyclically rotate the order of a list of hex values by N positions.

Sort a list of hex values by their true numeric value, ascending or descending.

Truncate every hex value in a list to at most N digits, keeping the leftmost digits.

Turn a list of hex values, each of any width, into a downloadable binary file.

Compute the bitwise XNOR of two hexadecimal values, digit by digit.

Compute the bitwise XOR of two hexadecimal values, digit by digit.

Generate a decorative ASCII-art zigzag of consecutive hex values, indentation tracing a wave.

Render a simplified illustrative triangle-strip net for a hexaflexagon, labeled with hex digits.

Show a classic hexdump -C / xxd-style dump of any text or uploaded file, read-only.

Parse C99/printf %a hexfloat notation like 0x1.8p3 into its decimal value.

Best-effort inverse of text-to-hexspeak-converter, using the same table's most likely reverse mapping.

Convert HSL (hue, saturation, lightness) values into a #RRGGBB hex color.

Convert HSV (hue, saturation, value/brightness) values into a #RRGGBB hex color.

Encode a decimal integer as the exact fixed-width hex bit pattern it would have in memory.

Convert a dotted-quad IPv4 address like 192.168.1.1 into its raw 8-digit hex value.

Expand a full or compressed IPv6 address into its raw 32-hex-digit representation.

Convert CIE L*a*b* (D65) values into a #RRGGBB hex color via the full inverse Lab->XYZ->sRGB pipeline.

Convert a little-endian hex value into its big-endian byte order.

Convert a decimal integer of any size into its hexadecimal representation.

Convert an octal (base-8) value into its uppercase hexadecimal representation.

Procedurally generate one example connected polyhex (N edge-connected hexagons) as ASCII art.

Convert separate red, green, blue (0-255) values into a plain #RRGGBB hex color.

Convert separate red, green, blue (0-255) and alpha (0-1) values into a #RRGGBBAA hex color.

Convert a standard Roman numeral like XXXI into its hexadecimal value.

Turn arbitrary text into a hexspeak-style string using valid hex characters and lookalike substitutions.

Count a string of unary symbols (1s or tally marks) and convert the count to hexadecimal.

Encode any Unicode text as its real UTF-8 byte sequence, formatted as hex.