Compare Two Texts or Files Online
Drop in two files — Word, PDF, Excel or plain text — or paste two texts, and every added, removed and changed word is highlighted for you. Nothing is uploaded: your documents are read and compared inside your own browser.
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About Text Diff
Confileo's Text Diff tool highlights every difference between two pieces of text. Everything runs in your browser, free and without signup, and your files are deleted automatically after processing.
Spotting what changed between two versions of a contract, article or code file by eye is slow and easy to get wrong. A diff tool highlights every change instantly.
Two versions of a document rarely arrive as text you can paste. They arrive as files: contract-v1.docx and contract-v2.docx, last month's price list and this month's, a report exported to PDF before and after the review. So the comparison starts with the file itself — pick or drop a .docx, .pdf, .xlsx, .csv, .txt, .md, .json or any source file on either side and its text is pulled out and laid into the panel for you.
That extraction runs inside your browser. A .docx and an .xlsx are ZIP containers, so they are unpacked here; a PDF is read with the same engine your browser uses to display one. Nothing is uploaded, which matters more for this tool than for most: the documents people most often need to compare are contracts, payslips, offers and medical reports, and a comparison that requires sending both versions to a server is not one you can honestly run on those. One limit worth knowing: a PDF that is a scan holds pictures of pages and no text at all, so run it through OCR first.
Confileo's Text Diff tool compares two blocks of text — Arabic or English — and highlights every addition and deletion line by line, entirely in your browser with nothing sent to a server. Ideal for reviewing edits, tracking revisions and confirming versions.
Putting two versions of a text side by side and hunting for the differences is precisely the task people are worst at. A changed figure, a swapped date, an inserted "not" — the eye skims past them because it believes it already knows the sentence. A line-by-line comparison finds them immediately.
You paste both versions and see what was added, removed and changed. There is nothing to install, and the texts are never stored — only the difference is produced.
The most serious everyday use is contract review. When the other side returns a "lightly adjusted" draft, comparing it against your last version is the only reliable check. In practice the meaningful edits are rarely in the headline clauses; they sit in notice periods, liability caps, termination rights and payment terms — short passages that read as boilerplate and are easy to skim.
Other cases that come up constantly: diffing two exports of a price or customer list to see what moved since last month; checking a translation against the approved source; confirming that what was published matches what was signed off; and, for students and researchers, seeing exactly which passages changed after feedback.
One practical tip about interpreting the result. Text copied out of a PDF usually carries line breaks in the middle of sentences, so whole paragraphs light up as changed when only the wrapping differs. Compare paragraph by paragraph in that case rather than pasting the whole document at once, and the output becomes far more useful.
Everything runs in the browser with no account. Your text is not stored or transmitted anywhere, which is the point when the documents are contracts or internal material.
Quick facts
- Price
- Free — no paywall
- Signup
- Not required
- Max file size
- Up to 100 MB per file
- Your files
- Deleted automatically after processing
- Works on
- Any browser — desktop, tablet, mobile
- Watermark
- None on your output
How to use Text Diff
- 1Paste the original text on one side.
- 2Paste the new version on the other.
- 3See every addition and deletion highlighted instantly.
Why use Confileo
- ✓100% free with no daily limits, watermarks or hidden paywalls.
- ✓No signup or account required — start using it instantly.
- ✓Your files are processed securely and deleted automatically for full privacy.
- ✓Works in any browser on desktop, tablet and mobile — nothing to install.
- ✓Fast processing built to handle real, everyday document workloads.
Text Diff — Frequently asked questions
Can it compare long documents?
Yes. Paste large blocks of text and every change is highlighted line by line.
Is my text uploaded anywhere?
No. The comparison runs in your browser; nothing is sent to a server.
How do I compare two versions of a text or document?
Paste the original on one side and the new version on the other, and every addition and deletion is highlighted instantly.
Does it highlight small changes like a word or symbol?
Yes. Differences are highlighted line by line, including the smallest edits between the two texts.
What is text comparison used for?
Reviewing contracts before and after edits, tracking changes in code or articles, and confirming differences between versions.
Can it compare code or formatted text?
Yes. Paste plain text or code and the line-by-line diff shows exactly what changed.
How do I compare two texts online?
Paste the first text on one side and the second on the other. Differences are highlighted line by line straight away — free, with no signup and nothing to install.
Does it detect changes inside a single line?
Yes. Beyond added and deleted lines, individual changed words are marked — essential when only one figure, name or date has moved.
How do I compare two versions of a contract?
Copy the text of each version into one side. Additions, deletions and reworded clauses stand out immediately, which is the fastest way to check what actually changed between two drafts before signing.
Is my text uploaded to a server?
No. The comparison runs entirely in your browser, so what you paste never leaves your device and is not stored. That is what makes it usable on confidential material.
Can I compare two PDF or Word files?
The tool compares text, so open each document, copy its contents and paste them in. For a PDF, running it through the PDF to Word tool first is the cleanest way to pull the text out.
Does it work for source code?
Yes. Code is compared line by line with indentation preserved — handy for checking two versions of a file when you are not using version control.
Is there a limit on how much text I can compare?
You can compare long documents comfortably; several thousand lines stay responsive because the work happens locally in the browser.
Can it ignore differences in spacing or capitalisation?
Whitespace-only changes are shown but are easy to skim past, since they highlight differently from real word changes. For a strict content review, paste plain text rather than text carrying formatting.
Is this tool really free?
Yes. Every Confileo tool is free to use with no daily caps, no watermark on your output and no credit card required.
Do I need to create an account?
No. You can use the tool straight away without signing up or logging in.
Are my files safe and private?
Yes. Your files are processed for the task you requested and then deleted automatically — they are never shared or kept.
Does it work on my phone?
Yes. The tool runs in any modern browser, so it works the same on desktop, tablet and mobile with nothing to install.