Text Compare
Compare two texts side by side and find the differences with word-level highlighting.
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ToolsSoup's Text Compare is a free online tool to compare two texts side by side and instantly find the differences between them. Paste one version on the left and the other on the right, then click Compare to see both texts aligned in two columns, with changed words highlighted inside each line and a similarity score that tells you how close the two versions are. Everything runs in your browser, so your text is never uploaded and stays completely private.
What is a text comparison tool?
A text comparison tool lets you find the differences between two pieces of text by placing them next to each other and marking what changed. Instead of reading both versions line by line yourself, you paste them in and the tool aligns matching lines, shows added and removed lines in their own column, and even highlights the exact words that differ within a changed line. It is the fastest way to spot edits between two drafts, two versions of an article, or two copies of a document.
How to compare two texts side by side
Comparing two texts and finding their differences with ToolsSoup takes just a few seconds:
- Paste the first text into the left box.
- Paste the second text into the right box.
- Optionally enable Ignore case or Ignore whitespace to skip cosmetic-only differences.
- Click Compare texts to see both versions aligned in two columns.
- Read the highlighted word-level changes and check the similarity score and counts above the result.
How is this different from a line-by-line diff?
A plain diff stacks everything in one column and flags whole lines as added or removed. Text Compare keeps the two texts in separate columns so you can read each version on its own, and it drills down to the word level: when a line was edited rather than fully replaced, only the words that actually changed are highlighted. It also reports a similarity percentage, so you get an at-a-glance sense of how much the two texts overlap rather than just a list of changes.
Why use this text comparison tool?
- 100% free with no ads, sign-up, or usage limits.
- Runs entirely in your browser — your text is never uploaded to a server.
- Side-by-side two-column view so you can read both versions at once.
- Word-level highlighting that pinpoints exactly what changed inside a line.
- A similarity score plus added, removed, and changed line counts.
Frequently asked questions
Is this text comparison tool free?
Yes. Every tool on ToolsSoup is completely free to use, with no account, sign-up, or hidden limits.
Is my text safe?
Absolutely. All comparison happens locally in your browser using JavaScript, so neither version of your text is ever sent to or stored on any server.
What does the similarity score mean?
The similarity score is the share of lines that are identical in both texts, shown as a percentage. A score of 100% means the two texts match exactly, while a lower score means more lines were added, removed, or changed between the two versions.
Does it highlight changes word by word?
Yes. When a line was edited rather than fully added or removed, the tool compares the two versions word by word and highlights only the words that differ, so small edits are easy to spot inside a long line.
How is this different from the diff checker?
The diff checker shows a single unified column of added and removed lines. Text Compare shows the two texts side by side in separate columns, adds word-level highlighting for edited lines, and reports a similarity score, which makes it better for comparing two drafts of writing.