TinyIMG renamed your image file names and broke the URLs on Shopify — how to recover
TinyIMG's image SEO feature renames your image files to keyword-rich filenames, and on Shopify changing a filename changes that image's CDN URL. Every place still pointing at the old URL — Google Images, blog posts, external sites that hotlinked your photos, hardcoded references in your theme or metafields — now 404s. Shopify keeps no history of the original filenames, so there's no native undo and no record of what each image used to be called.
Step by step
Stop TinyIMG from renaming anything else first. Open its Image SEO / filename settings and turn off both the bulk rename and the auto-rename-on-upload option — otherwise it keeps changing filenames and you're recovering against a moving target. While you're there, note whether it also touched alt-text, since that's the usual second casualty.
Find what actually broke, because the product pages themselves look fine. Shopify swapped them to the new filename automatically — the damage is to the OLD urls referenced everywhere else. Check Google Search Console and Google Images for your image URLs returning 404, then search your blog posts, custom pages, theme files, and metafields for hardcoded cdn.shopify.com image links that now point at filenames that no longer exist.
Fix each broken link, and know the honest limit. Shopify image URLs live on cdn.shopify.com, which you can't 301-redirect through Online Store > Navigation > URL Redirects — those only work on your own storefront paths, not the CDN. So you have two real options: update the references you control to the new URLs, or (cleaner) rename each affected image back to its original filename, which restores the exact original URL and un-breaks every old link at once. That second option needs the original filenames — the very thing Shopify didn't keep.
Going forward, keep a daily snapshot of every image's filename and URL alongside your alt-text and other SEO fields. Then a bulk rename is flagged the day it happens, with TinyIMG named as the likely cause, and you can restore the original filenames in one click — which brings back the original CDN URLs and fixes all the broken links at once, instead of hunting them down by hand from a Google export.
Source: Shopify Help Center: managing files and editing image SEO; Shopify Community threads on changed image URLs and 404s after bulk image renaming
SEO Vault keeps a daily snapshot of every SEO field on your store — meta titles, descriptions, alt-text, tags, handles (products AND collections) — and emails you the moment something changes in bulk, with the likely app responsible. One click restores yesterday's state, just the SEO fields. Free to monitor and get alerted; $14/mo for 1-click restore.