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Integer digit replacer

World's simplest integer tool

This online utility replaces individual digits in an integer with new values and prints the modified integer to the screen. You can adjust the replacement values for each digit from 0 to 9. The replacement value can be a new digit, a letter, a whole word, and even an emoji. By default, all digits are replaced simultaneously but you can also choose a two-pass mode that replaces already replaced digits the second time. Created by math nerds from team Browserling.
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New Digits 0-4
New value for digit 0.
New value for digit 1.
New value for digit 2.
New value for digit 3.
New value for digit 4.
New Digits 5-9
New value for digit 5.
New value for digit 6.
New value for digit 7.
New value for digit 8.
New value for digit 9.
Replace New Values
Allowing new digits to be replaced the second time.
Integer digit replacer tool What is a integer digit replacer?
With this browser-based program, you can replace digits in one or more integers. In the options above, there are ten digit replacement cells, each corresponding to one of the digits from 0 to 9. By entering a character in the cell, the corresponding digit is replaced by this character. For example, you can turn an integer "2822" into a binary value "1011" by replacing the digit 2 with 1 and the digit 8 with 0. You can replace the digits not only with new digits but with any other symbol. For example, you can map digits to letters: 1 to "a", 2 to "b", and 3 to "c", etc. In this case, if your input integer is "123", you will get textual data "abc" in the output. You can also replace digits with different Unicode pseudodigits and create unusual integers such as "𝟙𝟚𝟛" or "①❷⓷". By default, all digits are substituted independently at once and the new values are not substituted another time. You can change this behavior if you enable the recursive "Two-pass Mode" option. When enabled, it performs the digit replacement gradually, allowing repeated character substitutions. For example, if you enter the integer "12" and configure the following replacement mapping: 1 to "2", 2 to "3", then with the two-pass option turned off, you will get the result "23" (instant replacement of all digits), however with the two-pass option turned on, the result will be "33" because the first 1 is replaced by 2, which creates an integer "22", and then 2 is replaced by 3, which creates the integer "33". Integerabulous!
Integer digit replacer examples Click to use
Hidden Binary Message
In this example, someone sent us a long integer that secretly encodes a binary value in its base-10 digits. The hidden binary value was encoded using the following scheme: the even digits represent binary zeros and the odd digits represent binary ones. In order to decode this value, we replace the digits 02468 with 0 and the digits 13579 with 1. After replacing the digits, we find the secret binary, which turns out to be equal to the 25th Fibonacci value (integer 75025).
38618296148252049
10010010100010001
Required options
These options will be used automatically if you select this example.
New value for digit 0.
New value for digit 1.
New value for digit 2.
New value for digit 3.
New value for digit 4.
New value for digit 5.
New value for digit 6.
New value for digit 7.
New value for digit 8.
New value for digit 9.
Allowing new digits to be replaced the second time.
Grandma's Pancake Recipe
In this example, we decided to rewrite the granny's pancake recipe that was passed down from generation to generation. The original recipe used numerical values for the ingredient amounts but we decided to use words. We entered the word "one" in the replacement field for the digit 1 and the word "two" in the digit 2 field. Thus, in the output, we got an updated recipe with just words.
1 cup all-purpose flour 2 tablespoons white sugar 2 teaspoons baking powder 1 teaspoon salt 1 egg, beaten 1 cup milk 2 tablespoons vegetable oil
one cup all-purpose flour two tablespoons white sugar two teaspoons baking powder one teaspoon salt one egg, beaten one cup milk two tablespoons vegetable oil
Required options
These options will be used automatically if you select this example.
New value for digit 0.
New value for digit 1.
New value for digit 2.
New value for digit 3.
New value for digit 4.
New value for digit 5.
New value for digit 6.
New value for digit 7.
New value for digit 8.
New value for digit 9.
Allowing new digits to be replaced the second time.
Puzzle from Integers
In this example, we create an original numerical puzzle for children. We write down three simple equations with integers in the input and then replace the digits with funny Unicode characters. We replace the integer 2 with an alien emoji 👽, the integer 3 with a ghost emoticon 👻, and the integer 5 with a robot glyph 🤖. In the output, it's difficult to understand which emoji corresponds to which integer, so you need to solve the equations to find it out.
2 + 3 = 5 2 * 5 = 2 + 3 + 5 3 + 5 = 2 + 2 + 2 + 2
👽 + 👻 = 🤖 👽 * 🤖 = 👽 + 👻 + 🤖 👻 + 🤖 = 👽 + 👽 + 👽 + 👽
Required options
These options will be used automatically if you select this example.
New value for digit 0.
New value for digit 1.
New value for digit 2.
New value for digit 3.
New value for digit 4.
New value for digit 5.
New value for digit 6.
New value for digit 7.
New value for digit 8.
New value for digit 9.
Allowing new digits to be replaced the second time.
Two-pass Replacement
In this example, we have enabled the recursive two-pass mode that does a gradual digit replacement. First, we replace all 0s with 1s (intermediate result is 11234), then replace 1s with 2s (intermediate result is 22234), then replace 2s with 3s (intermediate result is 33334), and finally replace the 3s with 4s (final value is 44444).
01234
44444
Required options
These options will be used automatically if you select this example.
New value for digit 0.
New value for digit 1.
New value for digit 2.
New value for digit 3.
New value for digit 4.
New value for digit 5.
New value for digit 6.
New value for digit 7.
New value for digit 8.
New value for digit 9.
Allowing new digits to be replaced the second time.
Pro tips Master online integer 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://onlineintegertools.com/replace-integer-digits?input=38618296148252049&new-zero=0&new-one=1&new-two=0&new-three=1&new-four=0&new-five=1&new-six=0&new-seven=1&new-eight=0&new-nine=1&two-pass=false
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