404 Checker for Broken Image Links | Bulk Image Downloader

Dead links waste whole runs

A URL list always rots a little. Images get moved, deleted, or renamed, and a link that worked when you scraped it may be a 404 by the time you download. If you find out mid-batch, you have wasted time and ended up with a confusing pile of partial results. The Image URL 404 Checker in Bulk Image Downloader From URL List lets you catch those broken links first, so dead URLs come out of your list before you ever hit Save and Download.

Running a check

The checker is its own tab. The workflow is about as simple as it gets:

Open the Image URL 404 Checker tab.
Paste your URLs, one per line — the same format as a task list.
Hit Check 404 to test the whole batch.

The extension then tests each URL for reachability and reports back. Instead of staring at a progress bar stuck at fifty percent during a real download and wondering what is failing, you get a clear verdict on every link up front.

Reachable versus unreachable

Results come back split into two groups: reachable and unreachable. You see status codes — what is live and what is gone — so there is no guessing. The reachable list is the part of your batch that will actually download; the unreachable list is the dead weight you want out before you run anything.

This split is the whole point. It turns a vague “some of these might be broken” into a concrete, actionable list of exactly which URLs to keep and which to drop.

Getting the results out

Each section has its own Copy Results button. That means you can grab just the good URLs to build a clean task list, or just the broken ones to investigate or report elsewhere. Copying the reachable set into a fresh task is the fast path to a download you know will succeed end to end. Copying the broken set is handy when you need to chase down why links died or feed them back to whoever maintains the source.

Where it fits in a careful workflow

The 404 Checker earns its place at a few specific moments:

After scraping, to weed out links that were already stale.
After a redirect check, to confirm the final destinations are actually alive.
Before reloading an old CSV, since saved lists age and links expire.

The pattern is always the same and it is the professional move: check the list, fix the list, then download. A minute spent validating reachability up front saves you from a half-failed run and the cleanup that follows. Paired with the redirect checker — which tells you where links really go — the 404 checker confirms the destination is live, and together they turn a questionable URL list into one you can trust.