SEO Image-Inspector with Helpfile

Shows image size, file type & alt text on every image. Detects SEO issues and links to a help page to fix them.

SEO Image-Inspector with Helpfile shows you, with a single click, right on any web page, how well your images are set up for Google and for your visitors – no need to open developer tools. Whether you run your own online shop, maintain a company website, or check a client's images as a freelancer, this extension makes visible in seconds what would otherwise take digging through browser dev tools or external SEO tools. How it works – step by step Open any web page and click the extension icon in the toolbar. A small info box appears instantly right on top of every image on the page – no separate window, no table to scroll back and forth through. Scroll the page normally: the boxes move along with the images, even with sticky headers or content that loads in afterward. Images that are technically flawed (missing alt text, too large, too slow) are instantly recognizable by color and icons, without having to read every single box. When you're done, click the icon again – all boxes disappear, the page stays unchanged. What each info box shows in detail Natural resolution → displayed size. An image delivered at 2000×1500 pixels but displayed at only 400×300 pixels wastes bandwidth on every single page load. The box shows both values side by side and flags a significant oversize with color. File size and file type. The image format in use is visible at a glance. Older online shops in particular often still use uncompressed, outdated formats that could easily be replaced with more modern, smaller ones – often 25–50% smaller at the same visual quality. Alt text, readable directly. Not hidden behind a hover – shown right in the box, so you can scan an entire page and instantly see where alt text is missing or inappropriate. Missing alt text is one of the most common SEO and accessibility mistakes on the web, flagged with a red warning icon. Warnings for large or unnecessarily bloated images. Images over 200 KB, or images loaded far larger than they're displayed, get a red outline and a warning icon – exactly the images that hurt Core Web Vitals like Largest Contentful Paint the most, which can indirectly affect Google rankings. Built for beginners: the built-in help page The biggest difference from plain analysis tools: this extension doesn't just tell you WHAT is wrong – it links directly to a clearly written help page that explains, step by step, WHY a value matters and HOW to fix it – written for people without a technical background, not for developers. File names, alt text, file size, modern image formats, or fixed dimensions to prevent layout shifts: every point is explained using a simple, everyday analogy (images as shipping packages, file names as shelf labels), so that even beginners can fix the biggest problems themselves without hiring an agency. The info link sits right in the extension's toolbar, next to the close button, always just one click away – even in the middle of an active analysis. Open and save images directly Every info box has two small actions: open the image in a new tab, or download it straight through the browser's native "save as" dialog – handy for quickly grabbing a reference image, checking the original resolution, or exporting an image for reuse (e.g. in a product description or a presentation) without digging through the page source or dev tools. Honest about technical limits For some images from third-party servers (e.g. CDNs or embedded third-party content), no browser can determine the file size – that's a deliberate security boundary built into every browser (a missing Timing-Allow-Origin header on the third-party server), not a limitation of the extension itself. Instead of hiding that or just showing "0 KB", the extension shows "n/a" transparently with a mouseover explanation, and offers a click-to-retry for the cases where an image simply hadn't finished loading during the first scan. Built for real-world use Works with lazy loading. Many modern online shops only load images once they scroll into view. The extension recognizes common lazy-loading patterns (data-src, data-lazy-src, and similar) and preloads the real images invisibly in the background to deliver correct values even for images not yet visible on screen. No chaos with tightly packed small images. If several info boxes overlap (e.g. on icon rows or small product thumbnails), they fan out visibly and alternate between two slightly different shades. Whichever box you hover jumps automatically to the front, no manual dismissing required. Each box can be closed individually if it's ever in the way – handy on image-heavy pages. Fully bilingual. German and English, automatically matching the user's browser language, including every label and tooltip. Minimal permissions The extension deliberately keeps its permission footprint small: access only to the currently active tab at the moment you click the icon (no standing access to every website you visit), plus the standard downloads permission for the "save as" feature. There's no tracking, no data sent to external servers, and no ads. Frequently asked questions Does the extension slow down my browser? No – it only becomes active when you click the icon, and runs exclusively on the currently open page. Without an active analysis, it has zero effect on other tabs or overall browser speed. Does this work on every website? On the vast majority of regular websites, yes. Internal Chrome pages (chrome://) and the Chrome Web Store itself don't allow any extensions to run there, for security reasons built into the browser. Why do I sometimes see "n/a" for file size? See above – that's a security boundary of the browser for images from third-party servers, not a limitation of the extension. Is my data sent anywhere? No. The entire analysis runs locally in the browser. There's no server communication, no tracking, no analytics. Can I dismiss a single box without ending the whole analysis? Yes – every box has its own small close icon in the top-right corner that removes just that one box. What about images embedded as a CSS background instead of a classic <img> tag? The extension reliably captures regular <img> elements. Pure CSS background images are wired up differently and aren't currently evaluated separately. The extension is under active development. Feedback and suggestions are always welcome via the review feature on the Chrome Web Store. Typical use cases Before a website launch: Quickly click through the most important pages and check whether alt text is missing anywhere or uncompressed images were overlooked before the site goes live. Ongoing shop maintenance: After importing new product images (e.g. via WP All Import or similar tools), see within seconds whether the new images were uploaded at a sensible size and with alt text, instead of opening every single product in the backend. Client audits for freelancers and agencies: Get a first impression of the technical state of a client site's images within minutes – a solid basis for a proposal or an optimization workshop. Competitor research: Check which image formats and sizes a competitor's site uses, to put your own strategy in context. Training content editors: When several people maintain content, the extension helps build shared awareness across a team of what to watch for when uploading new images – a visual teaching aid using real examples from your own site, rather than abstract rules in a document. Compared to browser developer tools The network tab in Chrome's developer tools provides similar raw data, but it's cumbersome for this specific purpose: you have to open the network tab, reload the page, search through a long list for each individual image request, and then manually match it to the right image on the page – tedious with a hundred product images. Alt text and file name don't even show up there; you'd have to look those up separately in the Elements tab. SEO Image-Inspector bundles exactly the values that matter for image optimization, directly on each image – no detour through multiple tools, and no need to reload the page. Privacy in detail All functionality runs in the content script of the current page and in the extension's local background process. There is no communication whatsoever with any server operated by the developer, no analytics, no cookies, no tracking pixels. The only external connection you yourself trigger is the optional click on the "Info" button, which opens the help page at sven.ediger.de – and even that only happens if you actively click it. Who is this for? For shop and website owners who want to check their own images for SEO issues, for SEO beginners who want to understand what actually matters with images, for freelancers and agencies who want to quickly analyze client sites, and for anyone who simply wants to see the technical facts about an image on any web page – without ever opening developer tools.