Document and web page comparison

Know What Changed.

DiffNexa compares documents and public web pages, finds the changes that matter, and shows exactly where each change came from.

Compare a Document Monitor a Web Page

No account needed
Files are not stored
Deterministic comparison

Example resultRecruitment notice, two versions

Value changed

Page 2 · Vacancies

Original: 627
Revised: 654
Difference: +27 (+4.31%)

Evidence

Original · page 2 — “Total Vacancies: 627”

Revised · page 2 — “Total Vacancies: 654”

Compare and monitor with DiffNexa

Seven tools, one way of working: every change is listed, placed where it happened, and backed by the words or values from both versions.

Compare two files

Upload an original and a revised version. Both are compared, then discarded — never stored.

Compare

PDF Compare

Compare two PDF versions and see changes in text, numbers, dates and pages.

Open PDF Compare

Compare

DOCX Compare

Compare two Word documents and find changes in text, numbers, dates, lists and tables.

Open DOCX Compare

Compare

Excel Compare

Compare two Excel workbooks and find changed cells, formulas, rows, columns, sheets and links.

Open Excel Compare

Check a web page against your baseline

Save a copy of a public page as it reads today, keep the file, and compare the live page with it whenever you choose.

Web Monitoring

Website Change Detector

Compare a public web page against a baseline you saved and see exactly what changed.

Open Website Change Detector

Web Monitoring

Policy & Terms Monitor

Compare a privacy policy or terms page against a baseline you saved, and see which part of the document changed.

Open Policy & Terms Monitor

Web Monitoring

Competitor Monitor

Compare a competitor’s public page against your saved baseline and see what changed.

Open Competitor Monitor

Web Monitoring

Price Monitor

Compare a public pricing or product page against your saved baseline and see what changed.

Open Price Monitor

How DiffNexa works

Three steps, the same in every tool. The result is a list of changes you can check for yourself.

Step 1: Compare
Upload two documents, or give the address of a public web page and compare it with the baseline you saved.
Step 2: Find
DiffNexa identifies every change deterministically: the same two versions always give the same result.
Step 3: Prove
Every reported change points back to evidence from the compared versions — the page, heading or cell, and the exact words.

Why DiffNexa

Evidence for every change

Each change points back to where it came from — a page in a PDF, a heading in a Word document or web page, a cell in a workbook — and quotes both versions.

Deterministic results

Comparison is deterministic. The same two versions always produce the same result, and no AI decides what changed.

AI when useful

After a comparison you can ask AI Change Analyst to explain the changes it found. It is optional, and it never adds a change.

Nothing stored by default

Files and pages are read to produce your result and then discarded. Web page baselines are saved to your computer, not to DiffNexa.

AI Change Analyst · optional

Understand the changes, after they are found.

AI Change Analyst explains changes already detected by DiffNexa's deterministic comparison. It does not independently decide what changed.

Runs only when you ask, after the comparison is complete.
Sees the detected changes and short evidence excerpts — never your whole file.
Every explanation is checked against the comparison evidence before it is shown.

How AI Change Analyst works

1 · Comparison
DiffNexa finds and proves every change
2 · Evidence
Both versions’ words, with where they are
3 · Optional
AI Change Analyst explains what was found

Your files and data

What happens to what you compare, in plain words. There is no account, and nothing you compare is kept.

Documents: PDF, Word and Excel files are sent to DiffNexa’s comparison service, used only to produce your comparison, and discarded when the result comes back.
Web pages: DiffNexa reads the public page you name. The baseline is a file you download and keep; it is not stored by DiffNexa.
AI Change Analyst: Only when you ask: the detected changes and their short evidence excerpts are sent to the AI service this site uses.
Site analytics: This site uses Google Analytics to count page visits. Your files, the addresses you check and your results are not sent to it.

Read the Privacy Policy