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ASCII Validator

World's Simplest ASCII Tool

A simple browser-based utility that validates ASCII data. Just paste your ASCII text in the input area and you will instantly get the ASCII status in the output area. If the input contains only ASCII characters, you'll get a green badge, otherwise a red badge. Fast, free, and without ads. Import ASCII – get ASCII status. Created by computer nerds from team Browserling.

᠎᠎᠎          Tool Options

Extended ASCII

Expand the acceptable characters
from 7 bits to 8 bits (0 to 255).

What Is an ASCII Validator?

This web application validates ASCII data. It runs through each input character and checks if it belongs to the 7-bit ASCII character set. If the symbol's ASCII code is in the range from 0 to 127, the result is positive and a green badge is shown, if the code point is 128 or more, the result is negative and a red badge is shown. If you get a red badge, then each non-ASCII character is displayed on the screen together with its code point and the position in the text. You can also validate the extended 8-bit ANSI character set. By activating the Allow Extended ASCII option, you'll expand the range of acceptable values from 0 to 255. Asciiabulous!


ASCII Validator Examples

Click to try!

Validate a Proverb

In this example, we validate a proverb and get a positive result. Indeed, the input string uses only lowercase and uppercase Latin letters, as well as the dot character. All these code positions belong to the ASCII table range from 0 to 127.

Good things come to those who wait.
Required options
These options will be used automatically if you select this example.
Expand the acceptable characters
from 7 bits to 8 bits (0 to 255).

Extended ASCII

In this example, we enable the extended ASCII (ANSI) option to validate a German quote by Franz Kafka. The ANSI table includes all 128 7-bit ASCII characters plus 128 8-bit characters. Additional symbols include glyphs from foreign languages (such as German letters ä and ö), as well as special characters (such as copyright sign © and quotation brackets «»). Since the extended ASCII option is activated, the badge is green, but if you turn off this option, the badge will turn red as only the basic ASCII symbols will be allowed.

«Jeder, der sich die Fähigkeit erhält, Schönes zu erkennen, wird nie alt werden.» © Franz Kafka
Required options
These options will be used automatically if you select this example.
Expand the acceptable characters
from 7 bits to 8 bits (0 to 255).

Invalid ASCII

This example validates the input text and shows a red badge as the result. The text contains two characters that aren't in the ASCII table. The glyph 🍫 is a Unicode character and has the code position U+1F36B and the emoji 🤔 has the code point U+1F914. Both values do not belong to 7-bit or 8-bit ASCII sets, therefore, regardless of the extended ASCII option's state, the result is always negative.

Nine out of ten people like chocolate 🍫. The tenth person always lies 🤔.
Invalid symbols: symbol: 🍫, code point: 1f36b, position: 39 symbol: 🤔, code point: 1f914, position: 71
Required options
These options will be used automatically if you select this example.
Expand the acceptable characters
from 7 bits to 8 bits (0 to 255).

Pro tips Master online ascii tools

You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/ascii/validate-ascii?input=Good%20things%20come%20to%20those%20who%20wait.&extended-ascii=false

All ASCII Tools

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Quickly convert ASCII characters to binary numbers.
Quickly convert binary numbers to ASCII characters.
Quickly convert ASCII chars to octal values.
Quickly convert octal values to a ASCII chars.
Quickly convert ASCII values to decimal numbers.
Quickly convert decimal numbers to ASCII values.
Quickly convert ASCII symbols to hexadecimal values.
Quickly convert hexadecimal numbers to ASCII symbols.
Quickly convert ASCII to arbitrary base numbers.
Quickly convert numbers of arbitrary base to ASCII.
Quickly draw a 7-bit or extended 8-bit ASCII table.
Quickly generate 7-bit or extended 8-bit ASCII symbols.
Quickly generate random ASCII characters.
Quickly draw ASCII art from the given text input.
Quickly create an image from ASCII text.
Quickly convert ASCII text to HTML escape codes.
Quickly convert HTML entities to ASCII text.
Quickly convert ASCII to URL-encoding.
Quickly convert URL-encoded ASCII back to ASCII.
Quickly convert an ASCII string to raw bytes.
Quickly convert raw bytes to an ASCII string.
Quickly convert ASCII bytes to UTF8 characters.
Quickly convert UTF8 characters to ASCII bytes.
Quickly encode ASCII text to Morse code.
Quickly decode Morse code back to ASCII.
Quickly base64-encode ASCII string.
Quickly base64-decode previously encoded ASCII string.
Quickly convert ASCII to a Data URL.
Quickly convert a Data URL to ASCII.
Quickly make all ASCII characters lowercase.
Quickly make all ASCII characters uppercase.
Quickly randomize the case of each ASCII letter.
Quickly flip one or more bits in every ASCII character.
Quickly shuffle bits in every character of an ASCII string.
Quickly convert ASCII data to Unicode symbols.
Quickly convert Unicode symbols to ASCII data.
Quickly check if all input characters are ASCII.

Coming Soon

These ASCII tools are on the way!
ASCII Art Editor

Draw ASCII art in a neat browser-based editor.

ANSI Art Editor

Draw ANSI art in a neat browser-based editor.

Show NFO Files

Draw the contents of NFO files.

Convert ASCII to ANSI

Convert ASCII data to ANSI data.

Convert ANSI to ASCII

Convert ASCII data to ANSI data.

Convert ASCII to JPG

Create a JPG image from ASCII art.

Convert JPG to ASCII

Create ASCII art from a JPG image.

Convert ASCII to PNG

Create a PNG image from ASCII art.

Convert PNG to ASCII

Create ASCII art from a PNG image.

Convert ASCII to GIF

Create a GIF image (single frame) from ASCII art.

Convert GIF to ASCII

Create ASCII art from a GIF image.

Create an ASCII Animation

Create an animated GIF from multiple ASCII art frames.

Convert ASCII to Chemical Elements

Use chemical element names for ASCII values.

Convert ASCII to Scan Codes

Convert ASCII characters to scan codes.

Convert Scan Codes to ASCII

Convert scan codes to ASCII characters.

Convert ASCII to BCD

Convert ASCII code to BCD code.

Convert BCD to ASCII

Convert BCD code to ASCII code.

Convert ASCII to EBCDIC

Convert ASCII charset to EBCDIC charset.

Convert EBCDIC to ASCII

Convert EBCDIC charset to ASCII charset.

Convert ASCII to PETSCII

Convert ASCII data to PETSCII (CBM ASCII) data.

Convert PETSCII to ASCII

Convert PETSCII (CBM ASCII) text to ASCII text.

Convert ASCII to ATASCII

Convert ASCII data to ATASCII (ATARI ASCII) data.

Convert ATASCII to ASCII

Convert ATASCII (ATARI ASCII) data to ASCII data.

Rotate ASCII Characters

Rotate ASCII chars to the left or to the right.

Truncate ASCII Data

Make the input ASCII data shorter.

Slice ASCII Data

Extract a slice from ASCII data.

Clamp ASCII Data

Set upper and lower ASCII code bounds.

Randomize ASCII Order

Randomize the order of ASCII characters.

Reverse ASCII Characters

Reverse the order of ASCII chars.

Convert ASCII to Integer

Convert ASCII characters to integers.

Convert Integer to ASCII

Convert integers to ASCII values.

Convert ASCII to Keycodes

Convert ASCII characters to keyboard keycodes.

Convert Keycodes to ASCII

Convert keyboard keycodes to ASCII values.

Find ASCII Sum

Calculate the sum of individual ASCII code points.

Find ASCII Difference

Calculate the difference of individual ASCII code points.

Find ASCII Length

Calculate the length of an ASCII string.

Create a Table

Draw a table using ASCII characters as border elements.

Draw ASCII Tree

Draw a folder structure or a binary graph.

Draw ASCII Waves

Generate digital waveforms with ASCII characters.

Draw PETSCII Table

Draw a PETSCII (CBM ASCII) character set table.

Draw ATASCII Table

Draw an ATASCII (ATARI ASCII) character set table.

Draw an ASCII Spiral

Make all ASCII symbols go in a spiral.

Draw an ASCII Art Smiley

Draw various ASCII art smiley faces.

Debug ASCII Data

Visualize ASCII data at the byte and bit level.

AND ASCII Characters

Apply the AND operation on ASCII data.

OR ASCII Characters

Apply the OR operation on ASCII data.

XOR ASCII Characters

Apply the XOR operation on ASCII data.

NOT ASCII Characters

Apply the NOT operation on ASCII data.

Create ASCII from Regex

Generate ASCII data that matches the given regex.

Create Regex from ASCII

Generate a minimal regex that matches the given ASCII data.

Generate Fake ASCII

Use similar-looking Unicode characters for ASCII chars.

Add Errors to ASCII

Simulate data damage and add errors to ASCII data.

Add Typos to ASCII

Simulate keyboard typos and create errors in ASCII text.

Let Zalgo Damage ASCII

Unleash Zalgo on ASCII data.


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