The latest articles on DEV Community by Batch Image Tools (@batchimagetools). https://dev.to/batchimagetools https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4193437%2F45f6c925-046a-4470-90d4-39842c112953.png https://dev.to/batchimagetools en Batch Image Tools Mon, 19 Oct 2026 06:49:34 +0000 https://dev.to/batchimagetools/i-got-tired-of-marketplace-image-rejects-so-i-shipped-an-offline-html-batch-resizer-6el https://dev.to/batchimagetools/i-got-tired-of-marketplace-image-rejects-so-i-shipped-an-offline-html-batch-resizer-6el <p>Marketplace listing photos fail for boring reasons: wrong square size, file over the KB limit, or a watermark on an Amazon <strong>main</strong> image (not allowed).</p> <p>I was pasting product shots into random online compressors and hated the upload risk. So I built a <strong>single HTML file</strong> that stays on your machine:</p> <ul> <li>Pad / resize to common marketplace squares (800 / 1000 / 1200…)</li> <li>Optional text / logo watermark (turn <strong>off</strong> for Amazon main)</li> <li>Compress toward a max KB</li> <li>Batch rename → download ZIP</li> <li>EN / 中文 + dark mode</li> </ul> <p>No install, no account, no server. <code>#selftest</code> in the URL runs a built-in smoke test (broken file should fail; good files ZIP with <code>PK</code> signature).</p> <h3> Who it’s for </h3> <p>Etsy / Shopify / Amazon sellers and anyone who prepares lots of listing images weekly.</p> <h3> Honest status </h3> <p>Shop is live on Ko-fi at $9 one-time. Early days — distribution &gt; more features.</p> <p>If this solves a pain you have: <a href="https://ko-fi.com/s/67acc6a210" rel="noopener noreferrer">https://ko-fi.com/s/67acc6a210</a></p> <p>Curious what you’d add first: HEIC support, or a “spec checker” that only flags rejects without rewriting files?</p> webdev javascript productivity showdev