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Text Letter Highlighter

World's Simplest Text Tool

World's simplest browser-based utility for highlighting letters in text. Load your text in the input form on the left, specify the letters and symbols to be highlighted, and you'll instantly get an image of the text with the given characters highlighted in the output area. Powerful, free, and fast. Created by developers from team Browserling.

᠎᠎᠎          Tool Options

Letters to Highlight

Highlight these letters.
(Enter one letter per line.)
Highlight all letters but exclude
these particular letters.
(Enter one letter per line.)
Highlight uppercase and
lowercase letters separately.

Size and Typeface

Set the width of the image.
Or leave it empty to use the
native text width.
Font size.
Line height.
Set the padding on all sides.
Choose the letter font.
Import a custom font using a link.
(Please select the custom mode
in the list above.)

Letter Highlighting Colors

Highlighted letter color.
Highlighted letter background.
Non-highlighted letter color.
Non-highlighted letter background.
Image background color.

What Is a Text Letter Highlighter?

With this online tool, you can highlight certain letters in the given text. The program takes regular text as the input and in the output, it creates an image with the desired letters highlighted in different colors. The program primarily works with letters but you can also highlight single-digit and multi-digit numbers, punctuation marks, special characters, spaces, and even multi-letter strings. For example, if you want all vowels to be highlighted in red, you can enter the vowels "aeiou" in the "Highlight Certain Letters" option (enter one vowel per line) and set the marker color (for the background) or the color for highlighted letters to "red". In the "Highlight Certain Letters" mode, you can specify as many characters as you want, using a new line for each individual character. If you want to highlight multiple letters or a specific substring in the text, such as the syllable "wa" in the word "water", then you can enter this substring in the same option. If you want to highlight longer combinations of letters in the text, you can use the "Highlight All Letters" option. It immediately highlights all the letters and symbols in the text and it lets you remove highlighting from certain letters by entering them in the "Exclude These Letters" option. By default, both uppercase and lowercase letters are highlighted but to separately highlight both letter versions, you can disable the "Case Sensitive Letters" option. In the second block of options, you can adjust the size of the output image as well as set the font size of letters and height between text lines. If your text has a vertical structure, i.e., its lines are of a fixed width, you can skip the image width option. In this case, the program will draw the entire text without word wrapping on the image and the width of the image will be the longest text line. If the lines in your text are very long and need word wrapping, you can set the image width in pixels. In this case, the program will wrap text lines and place the text on the image so that it fits the exact width. Additionally, you can add padding around the image, which adds extra space on all sides of the image (top, bottom, left, right). To make your text look beautiful, you can choose from a variety of predefined fonts or switch to the custom-font mode and load a URL to a unique font (such as Google Fonts). As mentioned earlier, the highlighted letters can have a custom background color (marker color) and it can be set in the "Highlighted Background Color" option. You can also change the pen color used to write the letters in the "Highlighted Letter Color" option. Similarly, you can adjust the color scheme for the non-highlight letters in the "Other Background Color" and "Other Letter Color" options, and set the background color of the entire image in the "Background Color" option. Finally, you can also assign individual colors to each highlighted letter via a special letter coloring rule. Use the format "letter = pen-color/background-color" to specify a new pen color and background color for the letter. For example, the rule "a = red/yellow" will mark every letter "a" in red with a yellow background. The simplified rule format "a = red" will only change the pen color of the letter to red, and the format "a = /yellow" will only add a yellow background to the letter. Textabulous!


Text Letter Highlighter Examples

Click to try!

Highlight Vowels in a Poem

In this example, we turn a three-line poem into an image and highlight all vowels in it. We use a black pen to write the text on a "cornsilk" color background and add "lightskyblue" shading to the background of all lines. To visually emphasize the vowels ("aeiou") in the poem, we list them in the "Highlight Certain Letters" option and set a bright "deeppink" color for them. Since the poem has a fixed-width line format, we do not set the image width parameter. As a result, the program calculates the image dimensions on its own based on a font size of 50px and a line height of 55px.

Soft petals unfold A fragrant bloom, a gift Of beauty and grace
Required options
These options will be used automatically if you select this example.
This example will reset all options to their
default values before applying new ones.
Highlight these letters.
(Enter one letter per line.)
Highlight uppercase and
lowercase letters separately.
Set the width of the image.
Or leave it empty to use the
native text width.
Font size.
Line height.
Set the padding on all sides.
Choose the letter font.
Highlighted letter color.
Highlighted letter background.
Non-highlighted letter color.
Non-highlighted letter background.
Image background color.

Highlight Punctuation, Spaces, and Capital Letters

This example highlights punctuation marks, whitespace characters, and capital letters in a quote by Thomas Edison. To do this, it uses the "Highlight All Letters" mode and combines this mode with a letter exception list. In the list, it specifies all the lowercase letters a-z that it doesn't want to highlight. Therefore, all lowercase letters are displayed in black ink on a lavender blush color background. And all other characters (punctuation marks, whitespace characters, and capital letters) are displayed in purple color on a thistle color background. The quote uses the Georgia computer font and since the quote is very long, the words are wrapped within 460-pixel width.

"I have not failed. I've just found 10,000 ways that won't work." – Thomas Edison
Required options
These options will be used automatically if you select this example.
This example will reset all options to their
default values before applying new ones.
Highlight all letters but exclude
these particular letters.
(Enter one letter per line.)
Highlight uppercase and
lowercase letters separately.
Set the width of the image.
Or leave it empty to use the
native text width.
Font size.
Line height.
Set the padding on all sides.
Choose the letter font.
Highlighted letter color.
Highlighted letter background.
Non-highlighted letter color.
Non-highlighted letter background.
Image background color.

Highlight Substrings in the Text

In this example, we highlight not just single individual letters, but substrings consisting of groups of letters. To do this, we specify three substrings – "ful", "ing", and "ly" in the option "Letters to Highlight". The program then finds these suffixes in the adverbs and colors them in a bright lawn green color. The remaining letters are displayed in white color on a teal background. To make the text on the image look more pleasant, we load a custom beautiful cursive font called "Sacramento" via custom font mode.

As I walked through the beautiful, colorful garden on this wonderful, peaceful day, I couldn't help but feel grateful for the bountiful blessings in my life. The sun was shining brightly, casting a cheerful, playful glow over the landscape, and the birds were singing their joyful melodies.
Required options
These options will be used automatically if you select this example.
This example will reset all options to their
default values before applying new ones.
Highlight these letters.
(Enter one letter per line.)
Highlight uppercase and
lowercase letters separately.
Set the width of the image.
Or leave it empty to use the
native text width.
Font size.
Line height.
Set the padding on all sides.
Choose the letter font.
Import a custom font using a link.
(Please select the custom mode
in the list above.)
Highlighted letter color.
Highlighted letter background.
Non-highlighted letter color.
Non-highlighted letter background.
Image background color.

Multicolor Highlighting of Letters

In this example, we create a fun caption colored in multiple bright shades. For the base shade, we use the white color for the letters and the violet color for the background. Then we add individual colors for some of the letters via the advanced coloring format. We enter "c=lime" in the letter field to set the lime color for the letter "c". The format "h=yellow/blue" changes the letter "h" to the yellow color on a blue background, and the format "k=/tomato" sets the background color to "tomato" just for the letter "k".

I love chocolate chip cookies.
Required options
These options will be used automatically if you select this example.
This example will reset all options to their
default values before applying new ones.
Highlight these letters.
(Enter one letter per line.)
Highlight uppercase and
lowercase letters separately.
Set the width of the image.
Or leave it empty to use the
native text width.
Font size.
Line height.
Set the padding on all sides.
Choose the letter font.
Import a custom font using a link.
(Please select the custom mode
in the list above.)
Highlighted letter color.
Highlighted letter background.
Non-highlighted letter color.
Non-highlighted letter background.
Image background color.

Alphabet in Rainbow Colors

In this example, we create an image of the alphabet in rainbow colors. The alphabet letters are arranged in a single line and continuously transition through all the colors of the rainbow. To create such a coloring scheme, we used the option of assigning individual hexadecimal rainbow colors to each letter from "A" to "Z".

ABCDEFGHIJKLMNOPQRSTUVWXYZ
Required options
These options will be used automatically if you select this example.
This example will reset all options to their
default values before applying new ones.
Highlight these letters.
(Enter one letter per line.)
Highlight uppercase and
lowercase letters separately.
Set the width of the image.
Or leave it empty to use the
native text width.
Font size.
Line height.
Set the padding on all sides.
Choose the letter font.
Import a custom font using a link.
(Please select the custom mode
in the list above.)
Highlighted letter color.
Highlighted letter background.
Non-highlighted letter color.
Non-highlighted letter background.
Image background color.

Pro tips Master online text 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://onlinetexttools.com/highlight-letters-in-text?input=Soft%20petals%20unfold%0AA%20fragrant%20bloom%2C%20a%20gift%0AOf%20beauty%20and%20grace&highlight-certain-letters=true&highlight-letters=a%250Ae%250Ai%250Ao%250Au&case-sensitive=false&width=&font-size=50&line-height=55&padding=20&typeface=Papyrus&highlighted-letter-color=deeppink&highlighted-background-color=lightskyblue&other-letter-color=black&other-background-color=lightskyblue&background=cornsilk

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Coming Soon

These text tools are on the way!
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Find Levenstein distance of two text fragments.

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Create a list of all words in text.

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Lemmatize all words in text.

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Apply stemming to all words in text.

Color Symbols in Text

Add color to punctuation symbols in text.

Color Letters in Text

Add color to letters in text.

Color Words in Text

Add color to words in text.

Color Sentences in Text

Add color to sentences in text.

Color Paragraphs in Text

Add color to paragraphs in text.

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Add slight perturbations to the given text.

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Mess up characters in your text.

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Generate text using random words.

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Convert English text to Braille writing system.

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Convert Braille symbols to English text.

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Convert text characters to their corresponding code points.

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Convert numeric character code points to text.

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Convert CSV data to plain text columns.

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Convert plain text columns to a CSV file.

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Create a list of all 3-grams.

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Encode the entire text to a single number.

Convert a Number to Text

Decode text that was encoded as a number back to text.

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Divide text into chunks of certain size.

Format Text

Apply formatting and modification functions to text.

Find the Number of Symbols in Text

Count the number of punctuation marks and other sybmols in text.

Find the Number of Letters in Text

Count the number of letters in text.

Find the Number of Sentences in Text

Count the number of sentences in text.

Find the Number of Paragraphs in Text

Count the number of paragraphs in text.

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Apply text transformation rules to any text.

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Analyze text for interesting patterns.

Add Diacritics to Text

Add accent marks to text letters.

Enumerate Letters

Add a counter before every letter in text.

Enumerate Words

Add a counter before every word in text.

Enumerate Sentences

Add a counter before every sentence in text.

Enumerate Paragraphs

Add a counter before every paragraph in text.

Interweave Text Fragments

Interleave the letters or words of the given text fragments.

Randomize Letter Spacing

Mess up the spacing between letters in any text.

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Extract all emails from text.

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Extract all URLs from text.

Find All Numbers in Text

Extract all numbers from text.

Find All Countries in Text

Extract all countries from text.

Find All Cities in Text

Extract all cities from text.

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Convert text to punycode.

Decode Punycode to Text

Convert punycode to text.

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Encode text to Baudot encoding.

Convert Baudot Code to Text

Decode Baudot-encoded text.

Convert Text to Base32

Encode text to base32 encoding.

Convert Base32 to Text

Decode base32-encoded text.

Convert Text to Base45

Encode text to base45 encoding.

Convert Base45 to Text

Decode base45-encoded text.

Convert Text to Base58

Encode text to base58 encoding.

Convert Base58 to Text

Decode base58-encoded text.

Convert Text to Base85

Encode text to Ascii85 encoding.

Convert Base85 to Text

Decode Ascii85-encoded text.

Convert Text to Base65536

Encode text to base65536 encoding.

Convert Base65536 to Text

Decode base65536-encoded text.

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Encode text to nettext encoding.

Convert Nettext to Text

Decode nettext-encoded text.

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Convert written text into natural sounding voice.

Convert Speech to Text

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Encode text to UTF8 encoding.

UTF8-decode Text

Decode UTF8-encoded text.

UTF16-encode Text

Encode text to UTF16 encoding.

UTF16-decode Text

Decode UTF8-encoded text.

UTF32-encode Text

Encode text to UTF32 encoding.

UTF32-decode Text

Decode UTF32-encoded text.

IDN-encode Text

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IDN-decode Text

Decode IDN-encoded text.

Uuencode Text

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Uudecode Text

Decode Unix-to-Unix-encoded text.

Xxencode Text

Convert text to Xxencoding.

Xxdecode Text

Decode Xxencoded text.

Convert Text to Quoted Printable

Encode text to QP encoding.

Convert Quoted Printable to Text

Decode QP-encoded text.

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Remove all HTML tags from Text.

Strip XML Tags from Text

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Remove Carriage Returns from Text

Remove new line symbols from the end of each text line.

Compare Text

Find the difference between two text fragments.

Create Text Typos

Generate various text typos.

Create a Mirror Copy of Text

Generate a mirror reflection of text.

Cut Text

Cut out a piece of text.

Grep Text

Grep text for regular expression matches.

Head Text

Extract first symbols, words, or lines from text.

Tail Text

Extract last symbols, words, or lines from text

Generate Text Mnemonic

Return the first letter of each word in text.

Duplicate Paragraphs in Text

Make every paragraph to be two paragraphs in the given text.

Create a Word Cloud

Create an image from all words in text.

Create a Letter Circle

Create a circle from all letters in text.

Create a Letter Spiral

Create a spiral from all letters in text.

Create a Word Circle

Create a circle from all words in text.

Create a Letter Matrix

Create a matrix of any dimensions from letters in text.

Create a Word Matrix

Create a matrix of any dimensions from words in text.

Create a Word Spiral

Create a spiral from all words in text.

Split Words into Syllables

Split the input text into syllables.

Draw LCD Text

Write any text on an LCD display (with LCD font).

Draw a 2D Text

Convert text to 2-dimensional drawing.

Draw a 3D Text

Convert text to 3-dimensional drawing.

Create a Text Marquee

Create a horizontally or vertically scrolling text.

Animate Text

Create a GIF animation of a text message.

Slowly Reveal Text Message

Create a GIF animation that slowly reveals a text message.

Mojibake Text

Decode text using the wrong encoding and create garbled text.

Unbake Mojibaked Text

Try to find original text from garbled mojibaked text.

Obfuscate Text

Make text harder to read.

Print the Alphabet

Generate the entire alphabet from a to z.

Randomize the Alphabet

Print the alphabet in random order.

Remove Curse Words from Text

Delete swear words from text.

Edit Text

Edit text in a neat browser-based editor.


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