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Text diff

Compare two texts and highlight the differences.

Related tools

All Transform & clean tools →
Find and replace textReplace every occurrence of a word or phrase in your text at once.Fullwidth / aesthetic textConvert text to fullwidth 'vaporwave' characters (Ｈｅｌｌｏ).Reverse textReverse text by characters, words or lines.Strikethrough & underline textAdd s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶, u̲n̲d̲e̲r̲l̲i̲n̲e̲ or s p a c e d styling to text.Text repeaterRepeat any text a set number of times, with an optional separator.Text to speechRead any text aloud with your browser's built-in voices.Text truncatorShorten text to a maximum length and add an ellipsis, without cutting words.Upside down text generatorFlip your text upside down for fun bios and messages (ʇxǝʇ uʍop ǝpᴉsdn).

Text diff is free to use as often as you like, directly from this page. Its place is under Transform & clean; Find and replace text and Fullwidth / aesthetic text answer the questions closest to this one.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Text diff do?

Compare two texts and highlight the differences.

When would I actually use this?

Cleaning up a paste before it goes anywhere: stripping duplicates from a list, normalising case, removing accents for a filename, or sorting lines.

What is the most common mistake?

Sorting text as if it were ASCII. Accented letters land after Z in a byte sort, which puts "Zurich" before "Émile" and produces a list no reader will accept.

How is Text diff different from Find and replace text?

They sit next to each other but answer different questions: Find and replace text is the one to open when you need it to replace every occurrence of a word or phrase in your text at once. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Fullwidth / aesthetic text is the closest one after this: Convert text to fullwidth 'vaporwave' characters (Ｈｅｌｌｏ).

What else is worth having open alongside it?

Reverse text and Strikethrough & underline text — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Transformations use the browser's Unicode-aware string handling, so case changes and sorting respect the locale rather than byte order. Nothing is truncated: what comes out is the whole of what went in.

Further reading

All guides →
How-toNumbering the Lines of a Text for a Review with Several PeopleNumbering starts at 1 and cannot be set to 0, the alignment is spaces rather than zeros, and the remover undoes eight of the eleven separators without touching the indentation. What it still cannot do is tell your numbers from its own.GuideStripping Markdown: What Plain Text Loses, and What a Regex Gets WrongA link becomes text with its destination deleted, a nested list loses its hierarchy, a table becomes a row of words. Then the technical half: markdown has no single spec, and a regex stripper mangles a filename, a multiplication sign and the inside of a code block — all shown against a real parser.How-toFiltering Lines by a Pattern Without a Command LineThis is grep for people who do not use grep, with one important difference: the match is a plain substring, so a real regular expression returns an empty box and no error. Every claim here was checked by running the tool.GuideFormatting Numbers for Six Languages: Separators, Currency and the Parse Back1,234.56 and 1.234,56 are the same number, and confusing them changes the value a reader parses. We ran Intl.NumberFormat for all six site locales and printed every separator — including the invisible one French uses — then measured why parseFloat cannot undo any of it.ExplainerEmoji Are Harder Than They Look: Why "Just Strip the Emoji" Has No One-Line AnswerOne visible emoji can be one code point or fourteen UTF-16 units. We ran three popular regexes against a real sentence and each broke differently — one deleted the digits. Here is why, which Unicode property answers which question, and the grapheme-cluster rule that actually works.ExplainerWhat a Palindrome Checker Has to Decide Before It Can AnswerCase, whitespace, punctuation and diacritics: four policies, six real sentences, and the answer changes with each one. Then the harder half — reversing a string is itself undefined, and code-unit reversal breaks emoji and detaches accents, demonstrated in Node.