BYTETOOLS

Text Compare

Compare two texts online free and highlight every difference. A private text comparison tool that finds matches and changes right in your browser.

What is the Text Compare?

The ByteTools Text Compare tool finds the differences between two pieces of text online, free. Paste the original version on the left and the changed version on the right; the tool computes a line-by-line diff, matches the unchanged lines and highlights removed lines in red and added lines in green, exactly like a code review.

  • Side-by-side input with live line-based diff
  • Removed lines highlighted red, added lines green
  • Clear 'texts are identical' confirmation
  • Counts of added and removed lines
  • Handles long documents smoothly
  • 100% private — comparison runs locally

How to use the Text Compare

  1. 1

    Paste the original text into the left box.

  2. 2

    Paste the modified text into the right box.

  3. 3

    Review the color-coded diff below — red lines were removed, green lines were added.

  4. 4

    Edit either side and the diff updates automatically.

About the Text Compare

The ByteTools Text Compare tool finds the differences between two pieces of text online, free. Paste the original version on the left and the changed version on the right; the tool computes a line-by-line diff, matches the unchanged lines and highlights removed lines in red and added lines in green, exactly like a code review.

It is useful for comparing document revisions, checking contract edits, spotting changes between configuration files, verifying translations and reviewing rewritten copy. When both texts are identical, the tool tells you so explicitly.

The comparison runs entirely in your browser using a longest-common-subsequence algorithm — neither text is uploaded anywhere, so it is safe for confidential agreements and unpublished work.

Frequently asked questions

How do I compare two texts online for free?

Paste one version in the left box and the other in the right box. The comparison is completely free with no sign-up, and it instantly highlights everything that changed — deletions in red and additions in green — so differences jump out right away.

Is there a free text comparison tool that keeps my data private?

Yes — this one. Both texts are compared in your browser's memory using JavaScript and never uploaded to a server, so you get a free, private text comparison that is safe for contracts and unpublished work.

How do I check if two paragraphs match?

Paste each paragraph into its own box. If the two texts are identical the tool tells you so explicitly; otherwise every line that differs is highlighted, making it easy to see exactly where the paragraphs match and where they don't.

Does the text compare work like a code diff?

Yes. It uses the same longest-common-subsequence approach as tools like git diff, comparing texts line by line. Unchanged lines are shown in neutral color, giving you the familiar red/green unified diff view.

Can I compare Word documents or PDFs?

Copy the text out of the document and paste it into each box. The tool compares plain text, so formatting like bold or fonts is ignored — only the words and line structure are compared.

Why does the diff show a whole line as changed for a one-word edit?

The comparison is line-based: if any character on a line differs, the old line shows as removed and the new one as added. This keeps the diff fast and easy to read even for large documents.

Guides for Text Compare

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