Integer Tools

Generate a rows x columns random integer array as compact JSON-style nested array notation.

Generate a depth x rows x columns random integer array as compact JSON-style triple-nested array notation.

Convert Base64 strings encoded with this site's own integer scheme back into integers.

Generate random BigInt values with an exact digit length (5 to 100 digits), one per line.

Convert a list of sign-magnitude binary strings back into ordinary integers.

Print a strictly decreasing arithmetic sequence starting at a value, subtracting a fixed step.

Convert a list of a/b fractions into integers, rejecting any that aren't whole numbers.

Convert decimal or hexadecimal numeric HTML entities back into integer code points.

Print a strictly increasing arithmetic sequence starting at a value, advancing by a fixed step.

Compute the absolute value of every integer in a list, one per line.

Fold a list of non-negative integers with bitwise AND.

Compute the arithmetic mean of a list of integers.

Convert a single integer between any two number bases from 2 to 36.

Draw a hollow rectangle border filled with consecutive integers, walked clockwise from the top-left.

Center-align a list of integers into one monospace block, padded to the list's widest value.

Draw an ASCII ring shape of consecutive integers, using a simple distance-from-center threshold test.

Clamp every integer in a list into a minimum/maximum range.

Render each integer in a list with its own color from a rotating palette, chosen by list position.

Compare two integers and see whether A is less than, greater than, or equal to B.

Expand every integer in a list into its place-value expanded form.

Draw the classic ASCII diamond shape, filled with consecutive integers instead of a fixed character.

Compute the average of each integer's own digits, one result per line.

Clamp every individual digit of each integer into a min/max digit range.

Color every character of a single integer with a rotating palette, one color per digit position.

Run a left-to-right division across each integer's own digits, one result per line.

Repeat every digit within each integer a chosen number of times, in place.

Independently mutate each digit of every integer in a list at a controlled rate, for controlled parser corruption testing.

Generate randomized digit-level fuzz input from a list of integers, for stress-testing parsers.

Highlight every occurrence of a chosen digit (0-9) across a list of integers, per-character.

Pick the digit at a given position (from the left) out of every integer in a list.

Cyclically rotate the digits within each integer by a chosen number of positions.

Divide a list of integers left to right, one after another, as floating point.

Repeat every integer in a list a chosen number of times, each as its own line.

Compute the Shannon entropy, in bits, of each integer's decimal digit distribution.

Deterministically corrupt a chosen number of whole integers in a list, for testing parser error handling.

Keep only the even, odd, positive, negative, or in-range integers from a list.

Find and replace a literal digit substring within every integer in a list.

Generate a curated list of numeric edge cases (boundaries, safe-integer limits), padded with extra values as needed.

Scan free text for integers and highlight the ones matching even, odd, or greater-than-N.

Analyze a single integer: its binary/octal/hex forms, digit stats, parity, palindrome, primality, and more.

Left-pad every integer in a list with zeros up to a target width.

Generate a rows x columns grid of random integers within a chosen range, as space-separated ASCII rows.

Generate random integer tuples of a fixed size within a chosen range, one tuple per line.

Fold a list of non-negative integers with AND, then take the NOT at a chosen bit width.

Force every integer in a list to be negative, regardless of its original sign.

Fold a list of non-negative integers with OR, then take the NOT at a chosen bit width.

Compute the bitwise NOT of each integer independently at a chosen bit width.

Fold a list of non-negative integers with bitwise OR.

Detect palindrome, run, repeated-digit, and parity patterns in every integer in a list.

Right-align a list of integers into one monospace block, padded to the list's widest value.

Right-pad every integer in a list with trailing zeros up to a target width.

Cyclically rotate the order of a list of integers by a chosen number of positions.

Arrange consecutive decimal integers into a square ASCII grid, filled in clockwise spiral order.

Subtract a list of integers left to right, one after another.

Check whether each integer's digit string reads the same forwards and backwards.

Convert a list of integers into this site's own compact Base64 encoding scheme.

Convert a list of integers into sign-magnitude binary strings.

Express a list of integers as unreduced fractions over a chosen denominator.

Convert a list of integers (Unicode code points) into decimal numeric HTML entities.

Convert a list of integers into sign-magnitude octal strings.

Convert a list of non-negative integers into their English ordinal strings.

Convert a list of integers (0-16777215) into #RRGGBB hex color strings.

Build a regex that matches exactly a given set of integers, via literal alternation.

Convert a list of integers into unary notation: strings of repeated "1" characters.

Convert percent-encoded URL strings back into their integer Unicode code points.

Convert a list of integers (Unicode code points) into percent-encoded URL characters.

Generate a single line of random integers within a chosen range and length, space-separated.

Fold a list of non-negative integers with XOR, then take the NOT at a chosen bit width.

Fold a list of non-negative integers with bitwise XOR.

Generate an odd-order magic square (3-9) via the Siamese method, with every row/column/diagonal sum shown.

Generate several arithmetic sequences sharing a start value but with diverging step sizes.

Convert a list of sign-magnitude octal strings back into ordinary integers.

Parse English ordinal strings like "21st" back into plain integers.

Generate a triangle-wave integer sequence that bounces back and forth between a min and max value.

Convert #RRGGBB (or bare RRGGBB) hex color strings back into packed 24-bit integers.

Generate example integers matching a numeric regex pattern (a documented, restricted subset).

Reinterpret signed integers as unsigned values at an 8, 16, or 32-bit width.

Generate random small integers symmetrically around zero, within a chosen max magnitude.

Generate a valid, fully-solved 9x9 Sudoku grid and blank out a chosen number of cells as a puzzle.

Convert unary (repeated "1") strings back into ordinary base-10 integers.

Reinterpret unsigned integers as two's-complement signed values at an 8, 16, or 32-bit width.

Print the first N von Neumann ordinals in labeled and (for small counts) fully recursive set notation.