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Images That Won’t Download — Bulk Image Downloader Pro

danito

A batch that saves twelve files when you expected three hundred is frustrating—but it is rarely random. When images won’t download, the cause usually falls into one of a few buckets: the scan never saw the files, the URLs are dead, your filters rejected everything, or the job outran what Chrome could handle calmly. Work through them in order before assuming the tool is broken.

Bulk Image Downloader Pro runs locally in Chrome. It can fix workflow problems on pages you can already view; it cannot bypass logins, paywalls, or server-side access controls.

Step 1: confirm the scan actually found the images

Lazy-loaded, AJAX, and infinite-scroll galleries often render only a handful of pictures until you scroll. A quick Scan Current Page captures what is in the DOM at that moment—not what appears after you scroll to the bottom.

Run Deep Scan so the extension auto-scrolls and waits for late-loading images. For feeds that keep adding content, try Continuous Scanning. When a gallery spans paginated index pages, scan each page and merge results with Stack Mode (up to 100 pages) before you download.

Step 2: clear dead and redirected URLs

If the scan listed URLs but downloads fail or produce empty files, the links may have moved. Paste your URL list into the 404 checker (HEAD requests with GET fallback). Copy the reachable list into a new task manually—there is no automatic re-import.

Run the redirect checker on survivors to see 301/302 chains and record the final CDN endpoint. Drop unreachable entries before you retry the batch.

Step 3: check whether your filters rejected the whole list

Sometimes nothing is broken and your settings excluded every candidate:

  • minimum width/height set too high for a thumbnail-heavy page
  • file type filter that does not match how the site serves images
  • Download IF URL rules with a typo in Contains or Regex text
  • domain include/exclude lists that block the host you are scraping

Loosen one rule at a time and watch the preview count in grid or table view climb back up. The Advanced Image Filter preview helps confirm what will actually download before you commit.

Step 4: tame large batches in Chrome

Very large jobs can stall when too many tasks compete for bandwidth and processing:

  • enable Queued Downloads on the options page so tasks run one after another instead of all at once
  • lower parallel download concurrency—Licensed PRO allows up to 100; Try PRO caps at 1 URL per task for full-feature testing; Basic download-only caps at 2
  • add a request delay when using Bulk URL scrape so source servers are not hammered (minimum 500 ms)
  • enable per-task ZIP for very large sets to reduce loose-file overhead
  • save a scraper session so you can resume if a long run is interrupted

There is no guaranteed automatic retry/backoff for every failed URL—review the task log, fix the underlying cause, and re-run the reachable subset.

Step 5: know what no downloader can fix

Some failures are outside any Chrome extension:

  • images behind logins, paywalls, or accounts you are not signed into
  • files served only through expiring blob or session URLs that die minutes later
  • hotlink protection that blocks requests without the right referrer or cookie
  • canvas-rendered or DRM-protected content that never exposes a stable image URL

If you cannot see and right-click-save an image in your own logged-in browser session, bulk download probably cannot fetch it either.

Quick checklist

  1. Re-scan with Deep Scan (or Continuous Scanning / Stack Mode for paginated sets).
  2. Run 404 and redirect checkers; paste the clean URL list into a new task.
  3. Review dimension, file-type, and Download IF URL filters.
  4. Enable Queued Downloads, lower concurrency, and add scrape delay for heavy jobs.
  5. Accept that login-gated or expiring URLs need a different approach.

Install Bulk Image Downloader Pro and run this checklist the next time a batch comes up short.

Continue reading: Download Images from CDN URLs.

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