PostSleuth – external image checker

Verify external images actually render in your posts, not just lazy-load successfully

Problem

Post-publish checks misjudge lazy-loaded images as failures: before scrolling, image complete is false and naturalWidth is zero, but scrolling makes them appear. Worse, platforms often swap external image URLs for their own proxy, so checking only the original src gives false results.

Solution

A CI/cron-friendly checker: given a list of article URLs, it scrolls each target image into view, waits for a real load, and verifies currentSrc to detect proxy rewriting. It returns per-image status plus the final resolved URL, so you can continuously monitor whether outbound images break or get hijacked.

Users

Bloggers and small-site operators, SEO practitioners, site reliability maintainers

MVP

Ingest URL list and fetch articles; scroll each image into view and wait for complete; compare src vs currentSrc and flag proxies; produce a status report; scheduled runs and failure alerts

Revenue

Per-site subscription at $5-19/month; a one-time local edition as a low-friction entry

Why now

Content sites depend on external image hosts and platform proxies, making silent image failures common while monitoring still only checks for HTTP 200.