Compare Two Texts
Paste two versions of a text and see exactly what was added, removed or edited, word by word or line by line. Nothing leaves your browser.
Your two texts
Differences
Spot every change between two versions
A text comparison tool shows the differences and similarities between two blocks of text. It saves you from reading both versions side by side and hoping you caught everything. Paste the original on the left, the new version on the right, and the changes are highlighted right away: removed text in red, added text in green.
It is useful for proofreading edits from a client or colleague, checking what changed in a contract or policy, reviewing updates to a web page before it goes live, or confirming that a translation or rewrite kept every paragraph.
Three ways to compare
- Words is the best default for prose. Each changed word is marked, and punctuation is compared too.
- Lines suits lists, code, CSV data and long documents. Lines that changed show the exact words that were edited, and long stretches of unchanged lines are folded so you can focus on what moved.
- Characters catches tiny edits like a changed digit, a missing letter or a swapped accent.
Turn on "Ignore upper and lower case" when capitalization does not matter, and keep "Ignore extra spaces" on so double spaces and stray tabs do not show up as changes. The similarity score compares how much of the two texts is shared, from 0% for completely different texts to 100% for a perfect match.
How it works
The tool splits both texts into words, lines or characters and finds the smallest set of additions and removals that turns the first version into the second. This is the same approach used by developer tools that compare code. It all runs in your browser, so your text is never uploaded or stored.
Frequently asked questions
Is my text saved or sent anywhere?
No. The comparison happens on your device. Nothing you paste is sent to a server, and closing the page clears it.
Why does one changed sentence show as several small edits?
The tool marks the smallest change it can find. If a sentence was rewritten heavily, words that happen to match stay unmarked between the changes. Switch to line mode to see the whole sentence as one edit.
Can I compare Word or PDF files?
Copy the text out of each file and paste it in. Formatting such as bold or font size is not compared, only the words themselves.
Can it check for plagiarism?
It can show how similar two specific texts are, which helps when you already have both versions. It does not search the web for copied content.