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Clean Image URL List — Bulk Image Downloader Pro

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A paste of five hundred URLs imports in one click whether half of them are dead or not. Broken links surface later as empty files, redirect chains create duplicate saves, and tracking parameters turn one photo into three CDN variants. To clean image URL list data before it hits a task, run the checkers and dedupe tools first.

Bulk Image Downloader Pro scrubs lists on the options page in your browser. The 404 checker confirms reachability—it does not validate image MIME type—and cleaned URLs must be copied into a task manually; there is no automatic re-import from the checker results.

Step 1: remove unreachable URLs with the 404 checker

Paste the raw list into the 404 checker. It sends HEAD requests with GET fallback and splits reachable from unreachable URLs. Copy or download the reachable set and discard 404s, timeouts, and other dead entries. This single pass removes the biggest source of zero-byte downloads.

Step 2: flatten redirect chains

Short links and moved assets often bounce through 301/302 hops. The redirect checker follows each chain and shows the final destination. Replace pointer URLs with canonical endpoints so the same file is not listed three times under different paths.

Step 3: dedupe by URL, then by appearance

Run URL deduplication on exact duplicate links. For variants that survive because the text differs, use the perceptual duplicate finder (Licensed PRO scans up to 600 URLs per run; Try PRO is limited to one URL or source per scan). Pick Strict, Balanced, or Aggressive presets depending on how closely two thumbnails must match before one is removed.

Step 4: filter parameter noise and unwanted hosts

  • Download IF URL Not Contains rules to drop thumb, tracking tokens, or small-size query parameters
  • domain include/exclude filters to keep results on the CDN you trust
  • minimum width/height filters to skip icon-sized previews scraped from gallery indexes

IF-URL rules apply at download time, so you can trim output without destroying the original paste in the textarea.

Step 5: save the clean list for reuse

Copy the final URL set into a download task. Export Tasks writes a UTF-8 CSV snapshot of URLs and settings so the same scrub recipe runs again. Licensed PRO supports bulk CSV import when you need to reload a large cleaned list. Save scraper filters as a Saved Rule if the same site supplies messy URLs every week.

What this workflow cannot fix

  • hotlink-protected URLs that need in-context scraping instead of naked CDN links
  • login-gated images you cannot reach without an authenticated session
  • automatic task updates when checker results change—you paste the cleaned list yourself

Install Bulk Image Downloader Pro when imports should download cleanly on the first pass.

Continue reading: Download Images As ZIP Or Separate Files.

Get Bulk Image Downloader Pro on the Chrome Web Store, watch the tutorial video, or visit our YouTube channel for more URL-list cleanup tips.