ASCII Tools

Draw a character grid with per-cell foreground colors and export real ANSI SGR color escape codes.

Strip ANSI SGR color escape sequences and validate the remaining text is 7-bit ASCII.

Decode space-separated character codes in any base from 2 to 36 back into strict 7-bit ASCII text.

Bitwise AND two equal-length ASCII strings, character-by-character, positionally.

Write multiple ASCII art frames separated by "---" and play them back as an animation.

Draw ASCII art on a configurable rows x columns character grid with a column ruler and plain-text export.

Render a short piece of text as large block letters made of # characters.

XOR a single chosen bit position (0-6) in every character's 7-bit ASCII code.

Reorder the 7 bit positions of every ASCII character's code using one reproducible, seeded permutation.

Rotate character codes by any shift amount, across letters-only, printable, or the full 7-bit ASCII range.

Output the full ASCII character set as text, filtered to printable, control, or all 128 codes.

Shuffle the order of characters in strict-ASCII text using a seeded Fisher-Yates shuffle.

Clamp every character's ASCII code into a chosen [min, max] range, replacing out-of-range codes with the nearest bound.

Turn newline/comma/tab-delimited data into a bordered ASCII text table with auto-sized columns.

Break strict-ASCII input down character by character into decimal, hex, octal, and binary.

Compare two strict-ASCII texts position by position and see each character's code delta.

Randomly flip a random bit in a chosen percentage of characters, seeded and reproducible, for fuzz testing.

Measure strict-ASCII text length, where character count, byte count, and code unit count always match.

Bitwise-complement every character's code within the 7-bit ASCII range (127 - code).

Bitwise OR two equal-length ASCII strings, character-by-character, positionally.

Extract a substring from strict-ASCII text using start/end index slicing, including negative indices.

Browse a curated set of classic ASCII-art smiley faces and emoticons, one-line and multi-line.

Plot an outward Archimedean spiral onto a grid using a chosen ASCII character.

Sum the ASCII code of every character in strict-ASCII text and get a mod-256 checksum.

A searchable reference chart of all 128 ASCII codes with decimal, hex, octal, and binary values.

Wrap strict 7-bit ASCII text in a real ANSI SGR foreground-color escape sequence.

Convert strict 7-bit ASCII text to space-separated character codes in any base from 2 to 36.

Convert ASCII text to Atari ATASCII hex byte values, mapping newline to ATASCII's 0x9B EOL byte.

Base64-encode strict 7-bit ASCII text directly, with no UTF-8 conversion step needed.

Convert each ASCII character's decimal code to three BCD nibbles, this site's documented convention.

Convert strict 7-bit ASCII text to space-separated 8-bit binary, one group per character.

Spell strict-ASCII text using periodic-table element symbols, like the classic 'spell your name in elements' game.

Wrap strict 7-bit ASCII text as a data:text/plain;charset=us-ascii;base64 URI.

Convert printable ASCII text to IBM EBCDIC code page 037 (CP037) hex byte values.

Render multi-frame ASCII art ("---"-separated frames) to a real downloadable animated GIF.

Encode strict 7-bit ASCII text as a decimal numeric HTML entity per character.

Convert ASCII characters to their legacy JS KeyboardEvent.keyCode numeric values, US QWERTY.

Convert strict 7-bit ASCII text to space-separated 3-digit octal, one group per character.

Convert ASCII text to Commodore 64 unshifted PETSCII hex byte values.

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

Convert ASCII text to real PS/2 Set 1 keyboard make-scan-codes, US QWERTY layout.

Convert strict 7-bit ASCII text to space-separated U+00XX Unicode code point notation.

Turn a 2-space or tab-indented list into a Unix tree-style ASCII directory diagram.

Cut strict-ASCII text to its first N characters and report exactly how many were removed.

Introduce human-typing-style typos (adjacent-key substitution, drops, duplicates, transpositions) that never leave plain ASCII.

Audit a whole block of text and list every character outside strict 7-bit ASCII, not just the first.

Plot a sine wave as ASCII art across a configurable width, height, and frequency.

Bitwise XOR two equal-length ASCII strings, character-by-character, the classic building block of a XOR cipher.

Validate strict-ASCII input, then layer random Unicode combining marks onto it for a zalgo effect.

A reference chart of Atari ATASCII codes 32-126, which pass through identically to ASCII.

Decode Atari ATASCII hex byte values back into ASCII text, mapping 0x9B back to a newline.

Decode Base64 and strictly validate that every resulting byte is 7-bit ASCII.

Decode this site's 3-nibble hyphenated BCD segments back into ASCII text.

Decode space-separated 7-or-8-bit binary groups back into strict 7-bit ASCII text.

Parse a data:text/plain;base64,... URI, decode it, and validate the result is 7-bit ASCII.

Decode IBM EBCDIC code page 037 (CP037) hex byte values back into printable ASCII text.

Generate pronounceable fake 'words' from ASCII consonant/vowel syllables for placeholder text.

Convert every frame of an uploaded GIF (animated or static) into multi-frame ASCII art text.

Decode HTML entities back into characters and strictly validate the result is 7-bit ASCII.

Decode legacy JS KeyboardEvent.keyCode numbers back into (uppercase) ASCII text.

View classic scene .nfo release files with correct CP437 box-drawing and block characters.

Decode space-separated octal groups back into strict 7-bit ASCII text.

A reference chart of Commodore 64 unshifted PETSCII codes 32-126 with decimal, hex, and character.

Decode Commodore 64 unshifted PETSCII hex byte values back into (uppercase) ASCII text.

Generate a random string of a chosen length, sampled from a chosen ASCII code range.

Generate a random sample string matching a regex pattern, guaranteed strict printable ASCII.

Decode PS/2 Set 1 keyboard make-scan-codes, including the 2A shift prefix, back into ASCII text.

Decode space-separated U+XXXX Unicode code points back into strict 7-bit ASCII text.