Free online string regular expression tester. Just enter your string and a regular expression and this utility will automatically check if the string matches the given regexp. There are no intrusive ads, popups or nonsense, just an awesome regex tester. Load a string – perform a regex check. Created for developers by developers from team Browserling.
Free online string regular expression tester. Just enter your string and a regular expression and this utility will automatically check if the string matches the given regexp. There are no intrusive ads, popups or nonsense, just an awesome regex tester. Load a string – perform a regex check. Created for developers by developers from team Browserling.
This web application checks whether the given string matches the given regular expression. If so, it prints "true", if not, it prints "false". You can enter a regular expression in the options. The standard regexp format is "/pattern/flags", where flags are optionally "g", "i", "m", "s", "u", and "y". The "g" flag looks for all matches, the "i" flag makes matching case-insensitive, the "m" flag enables multi-line mode (in this case the multi-string option, described below must be disabled), the "s" flag makes the dot regular expression character match the newline character (in this case the multi-string option, must also be disabled), the "u" flag enables Unicode support, and the "y" flag enables sticky matching. When entering a regular expression, you can also skip slashes and flags and just enter "pattern" for easier and faster use. If you want to test several lines at once, use the multi-string option. It shows the status of each entered string on each line. Stringabulous!
This web application checks whether the given string matches the given regular expression. If so, it prints "true", if not, it prints "false". You can enter a regular expression in the options. The standard regexp format is "/pattern/flags", where flags are optionally "g", "i", "m", "s", "u", and "y". The "g" flag looks for all matches, the "i" flag makes matching case-insensitive, the "m" flag enables multi-line mode (in this case the multi-string option, described below must be disabled), the "s" flag makes the dot regular expression character match the newline character (in this case the multi-string option, must also be disabled), the "u" flag enables Unicode support, and the "y" flag enables sticky matching. When entering a regular expression, you can also skip slashes and flags and just enter "pattern" for easier and faster use. If you want to test several lines at once, use the multi-string option. It shows the status of each entered string on each line. Stringabulous!
This example tests the authenticity of a string. It checks whether all letters belong to the English alphabet. This is done using the regular expression /^[A-Za-z ]+$/. Here, "^" denotes the beginning of a string, "[A-Za-z ]+" corresponds to uppercase and lowercase letters of the Latin alphabet as well as a space character, and "$" denotes the end of a string. Surprisingly, the result of the test is false. It's because this string is not authentic and contains Unicode homoglyphs. Instead of the English letter "a", there's a fake Cyrillic letter "а".
This example tests binary values. It activates the multi-string mode to get the status of all input numbers at once. It uses the regular expression /^[01]+$/g, which accepts only the digits "0" and "1" in a string. It is easy to see in the output that the 2nd, 6th, and 8th values are not binary numbers because they contain the English letters "I", "o", and "l".
In this example, we use a simple regular expression /cat/ to find all lines containing the word "cat". As the input strings have randomized cases, we add the "i" flag to the regex. With this flag, the search is case-insensitive and the strings "CAt" or "caT" satisfy the pattern "cat".
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!
Quickly edit a string in a browser-based editor.
Replace a set of strings with a new set of strings.
Convert a string to a title.
Convert a string to proper case.
Convert the first letter of every word in a string to uppercase.
Stretch out a string and align it along the left and right margins.
Align a string to the left.
Format and align a multi-line string.
Find how many letters there are in a string.
Find how many words there are in a string.
Find how many lines there are in a multi-line string.
Find how many paragraphs there are in a multi-line string.
Sort all letters in a string alphabetically.
Sort all words in a string alphabetically.
Sort a string that contains only numbers.
Reverse the order of all words in a string.
Reverse the order of all sentences in a string.
Find most frequent letters, words and phrases in a string.
Create a string with specific properties.
Generate a mnemonic for words in a string.
Rearrange letters in a string and create a new string.
Add line numbers to a multi-line string.
Wrap strings to the given line length.
Split a string into chunks of certain length.
Find syllables in a string.
Shuffle the order of all words in a string.
Find and extract all email addresses from a string.
Find and extract all web addresses from a string.
Make a string go in zigzags.
Make a string go in a circle.
Make a string go in a square or a rectangle.
Make a string go in a spiral.
Fit a string in an N-by-M block.
Find and extract all numbers from a string.
Analyze a string's complexity, including entropy.
Quickly convert a string to ROT18.
Encode a string to punycode.
Decode a string from punycode.
Convert a string to quoted-printable encoding.
Convert quoted-printable encoded data to a string.
Encode a string to base32.
Decode a string from base32.
Encode a string to base45.
Decode a string from base45.
Encode a string to base58.
Decode a string from base58.
Encode a string to Ascii85.
Decode a string from Ascii85.
Encode a string to UTF8.
Decode a string from UTF8.
Encode a string to UTF16.
Decode a string from UTF16.
Encode a string to UTF32.
Decode a string from UTF32.
Encode a string to IDN.
Decode a string from IDN encoding.
Convert a string to Unix-to-Unix encoding.
Convert Unix-to-Unix data to a string.
Convert a string to Xxencoding.
Convert an Xxencoded string to a regular string.
Strip all HTML tags from a string.
Remove all diacritical signs from a string.
Randomly add accent characters to letters in a string.
Remove punctuation marks and other symbols from a string.
Remove characters from a string.
Remove vowels from a string.
Remove consonants from a string.
Duplicate spaces in a string so one space becomes two.
Normalize string spacing and remove all duplicate spaces.
Visualy compare and find differences between two strings.
Calculate Levenshtein distance between two strings.
Calculate Hamming distance between two strings.
Find the longest common subsequence of two strings.
A tiny string rewriting system.
Limit the alphabet letters that are used in a string.
Convert a string to Unicode mess.
Remove Unicode mess from a string.
Create a list of all possible string typos.
Generate a mirror copy of a string.
Generate all 3-grams of a string.
Generate all ngrams of a string.
Generate n-skip-m-grams of a string.
Create a list of tokens from a string.
Lemmatize all words in a string.
Do stemming of all words in a string.
Extract fragments that match a regular expression in a string.
Split a string into fragments and extract the beginning parts.
Split a string into fragments and extract the ending parts.
Create a hyperstring from a string.
Create a regular string from a hyperstring.
Create an array of characters from a string.
Split a string into characters and return their integer values.
Put digits in place of characters in a string.
Correct misquoted strings (add/remove missing quotes).
Shift characters in a string to the left or right.
Create a colorful string.
Create a SEO-friendly URL from a string.
Substitute random characters in a string and make errors.
Run a spell checker and find mistakes in a string.
Interleave two strings character by character.
Duplicate characters in a string multiple times.
Draw a string on an LCD screen.
Create a string that doesn't have too many characters.
Create a string that has many characters.
Generate a string with a certain amount of characters.
Create two strings that have the twin property.
Create three strings that have the triplet property.
Generate a word cloud from all words in a string.
Split a string into multiple substrings.
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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 peoples' lives easier, so we created this collection of online string tools. All our tools share the same user interface so as soon as you learn how to use one of the tools, you'll instantly know how to use all of them. Our online string tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!
