Check Image Links Before Downloading

A download that fails halfway through is almost always a list problem, not a tool problem. The fix is to check image links before downloading — validate every URL up front so dead and redirected links leave your batch before you commit to saving anything.

Why you should check image links before downloading

URL lists go stale. Images get moved, renamed, or deleted, and a link that worked when you scraped it may be broken by the time you download. If you only discover this mid-run, you are left with a confusing pile of partial results and no clear sense of what failed. Taking a minute to check image links before downloading converts that uncertainty into a clean, known-good list.

Step one: the 404 Checker

Open the 404 Checker, paste your URLs one per line, and run the batch. It tests each link for reachability and splits the results into reachable and unreachable, with status codes so there is no guessing:

The reachable list is the part that will actually download.
The unreachable list is the dead weight to drop or investigate.
Each section has its own copy button, so you can grab just the good URLs to build a clean task.

This is the core of any routine to check image links before downloading.

Step two: the Redirect Checker

Reachable is not the whole story — a link can resolve but bounce through several hops before landing somewhere unexpected. The Redirect Checker traces the redirect chain and reports the final URL for a whole batch. That matters because the destination you download from should be the real image, not a placeholder or a login wall the redirect leads to.

Run the redirect check, then re-run the 404 check on the final URLs to confirm those true destinations are alive.

Build a clean list, then download

With both checks done, copy the verified reachable URLs into a fresh task and download with confidence. The pattern is always the same and it is the professional move: check the list, fix the list, then download. Pair it with URL deduplication to drop repeats and you have a list that is reachable, current, and tidy.

When the pre-flight check matters most

Checking links first is always good practice, but a few situations make it close to essential:

Reloading an old CSV. Saved lists age, and links expire quietly. Validate before you trust a file you scraped weeks ago.
After scraping a fast-changing site. News, marketplace, and social pages rotate images constantly, so freshly scraped URLs can already be stale.
Before a big or unattended run. The larger the batch, the more painful a mid-run failure is — validation up front protects the whole job.
When handing the list to someone else. Passing on verified links spares the next person from chasing dead URLs.

In each case a quick check converts a fragile list into a dependable one before any real work begins.

Local, batch-friendly, repeatable

Both checkers run locally in your browser with no account and no upload, and they handle whole batches at once rather than one link at a time. Save the cleaned list as a session so you can return to it later without re-validating. To check image links before downloading and stop wasting runs on dead URLs, install Bulk Image Downloader From URL List and run the 404 and redirect checkers first.