Duplicate Content Finder

Find duplicate and overlapping WordPress posts before they compete with each other in search: the 2019 guide and the 2023 rewrite, the category page and the pillar post, three near-identical round-ups. Run one scan and the plugin finds every overlapping pair, shows which version is stronger and why, lists the content that exists only in the weaker one, and builds a merge and redirect plan you can export. It changes nothing on your site automatically — the decision stays yours. What it finds

• Every overlapping pair, ranked. Sorted by similarity and banded near identical, strong overlap or partial overlap, because a category is easier to act on than a bare percentage.
• Duplicate content in any language. Japanese, Chinese and Korean posts are compared with character shingles instead of word shingles, so unspaced scripts match properly instead of producing noise.

What you see after scanning

• Which post should stay, and why. Content length, publication date, comment activity, inbound internal links, featured image and slug quality are scored side by side, so you can see the reasoning behind the canonical suggestion — and disagree with it.
• What you would lose. The sections that exist only in the version you are about to retire: the question worth answering before any merge.
• A redirect plan before anything is created. Source path, target path and status code for each retired post.
• CSV export. The duplicate report and the redirect plan, in a shape other redirect plugins can import.

Why it is different Spotting two similar posts is the easy part. A content audit becomes useful when it tells you which version to keep and what merging would cost, and this plugin is built around that decision rather than a similarity score alone. Safe by design

• Read-only. It never merges, deletes, rewrites, trashes or redirects anything.
• Nothing leaves your server. No external service, no analytics, no telemetry.
• No account, no API key. Install it and scan.
• Tidy. Scan data lives in three tables of its own, removed on uninstall.

How it works

1. Scan. Each post gets a fixed-length fingerprint, and only posts whose fingerprints collide are compared in full — so large sites stay fast.
2. Compare. For each overlapping pair: which version is stronger, on what evidence, and what only the other one contains.
3. Plan. Export the merge and redirect plan and act on it by hand, with a redirect plugin you already use, or with Pro.

Free, and the separate Pro plugin Free is a complete job: find the overlap, compare, decide, export the plan. It is not a trial — nothing expires and no feature stops working. A separate Pro plugin, distributed outside WordPress.org and not bundled here, carries the plan out inside WordPress: it performs the merge, creates the 301 redirects, rewrites internal links pointing at the retired post, and keeps a revision backup with rollback. Try it without installing A WordPress Playground blueprint ships with this plugin. When the directory offers a Live Preview for it, that preview boots a temporary WordPress in your browser, seeded with posts that overlap on purpose, and opens straight on the results. Nothing is installed on your own site. Full documentation and worked examples: https://hublo-wp.com/free-plugins/duplicate-content-auditor/

1.0.1

• Listing update: the plugin is now listed as "Duplicate Content Finder", with a clearer description, tags and screenshot order. No functional change.

1.0.0

• First release.
• Near-duplicate detection with CJK-aware shingling.
• Canonical suggestion with visible scoring, section comparison, redirect plan and CSV export.