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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.
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What is a ascii validator?
learn more about this tool
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 useValidate 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
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
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
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://onlineasciitools.com/validate-ascii?input=Good%20things%20come%20to%20those%20who%20wait.&extended-ascii=false
All ascii tools
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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We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling we love to make developers' lives easier, so we created this collection of online ASCII tools. Unlike many other tools, we made our tools free, without ads, and with the simplest possible user interface. Our online ASCII tools are actually powered by our programming tools that we created over the last couple of years. Check them out!
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Privacy Policy
we don't log data!
All conversions and calculations are done in your browser using JavaScript. We don't send a single bit about your input data to our servers. There is no server-side processing at all. We use Google Analytics and StatCounter for site usage analytics. Your IP address is saved on our web server, but it's not associated with any personally identifiable information. We don't use cookies and don't store session information in cookies. We use your browser's local storage to save tools' input. It stays on your computer.
Terms of Service
the legal stuff
By using Online Ascii Tools you agree to our Terms of Service. TLDR: You don't need an account to use our tools. All tools are free of charge and you can use them as much as you want. You can't do illegal or shady things with our tools. We may block your access to tools, if we find out you're doing something bad. We're not liable for your actions and we offer no warranty. We may revise our terms at any time.