--- title: "Free product image size checker for marketplaces | Herofab" description: "Check product photos against Amazon, eBay, Shopify, Google Shopping, Zalando and Trendyol image rules — free, in your browser, nothing uploaded." url: https://herofab.app/tools/image-size-checker language: en updated: 2026-11-12 --- # Will your photo pass? Check it free. Drop product images and see, for each marketplace, whether size, file size, format and aspect ratio meet the published rules. The check runs in your browser; nothing is uploaded. ![A pair of cream leather pumps on white · Image size checker](https://herofab.app/img/ex/heels-packshot-1100.webp) Made with Herofab · Packshot studio ## Choose your images. JPEG, PNG, WebP, GIF and AVIF are read in every modern browser. Files are never uploaded. ## What the checker reads from a file and what it lists Image size checker takes three things from each file: its width and height in pixels, its file size and its format. The dimensions come from opening the image in the browser; the format comes from the file type the browser reports, or from the extension of the file name when that type is not a known one. No colours, no background and no product outline are read. Each dropped file gets its own card. The card lists every marketplace for which the Herofab guides hold size or file rules, one line each, and the name on a line leads to that marketplace's guide. A line reads Passes, or it names each rule the file does not meet: a format that is not accepted, a file above the size limit, a side that is too short or too long, too many megapixels, an aspect ratio other than the required upright one, or dimensions other than the exact ones asked for. ## When a size check is enough and when another tool fits Use this checker when a finished image has to go to several sales channels and the question is which of them accept the file as it is. Product photo checker is the neighbour for a main image: it measures the background, the fill and the cut-off edges from the pixels for one chosen marketplace, and it adds that marketplace's size and format line to the same report. White background checker reads the colour of the pixels along the edges of a photo, and AI image label checker reads the markers inside the file; neither compares the file with size rules. When a line here names a problem, a free tool can change the file: Marketplace image resizer fits the photo inside a marketplace's dimensions with padding and without cropping, Image compressor saves it as a JPG under a file-size limit, and HEIC to JPG converter turns a HEIC photo into a JPG. ## How to read the list and what it leaves unmeasured Each line compares one marketplace's limits with the file exactly as it is, and a megabyte is counted as a million bytes. A passing line can carry a note when the image is too small for zoom. If the browser cannot open a file, the card says that its dimensions could not be read and no rule is checked; a JPEG or PNG copy can be dropped instead. The first check runs without sign-up, and later checks continue with a free Herofab account. Passes means that the file meets the size, file-size, format and ratio limits that the guide records for that marketplace, as checked on the date the page shows. It says nothing about the picture: background, fill, text and logos are not read. The format is taken from the type the browser reports or from the file name, not from the image data. A pass is not the approval of a marketplace, and the channel's own rule page is the last reference. ## About the checker. **Does this free tool need an account?** The first successful use of each free tool is available without an account. If prompted to continue using it, create a free Herofab account. Files are processed in your browser and are not uploaded. **Is my image uploaded?** No. The checker reads the file inside your browser; nothing is sent to a server. **Which rules are checked?** Size, megapixels, file size, format and aspect ratio, as published by each marketplace and summarised in the [guides](https://herofab.app/guides/) (checked 24 September 2026). Background, framing and cut-off edges are measured by the [product photo checker](https://herofab.app/tools/product-photo-checker). **What if my image fails?** Herofab delivers images in 20 marketplace sizes without cropping the product. [Create an account](https://app.herofab.app/login?lang=en&entry_source=tool) to try it with 20 free credits. **Can it check a HEIC photo straight from a phone?** Only in a browser that can open HEIC. Where the browser cannot open the file, the card says that the dimensions could not be read, and no rule is checked. HEIC to JPG converter turns the photo into a JPG first, also in the browser, and that JPG can then be dropped here. **Does the checker change or resize the file I drop?** No. It reads the dimensions, the file size and the format and writes the result on the page; no new file is made, so there is nothing to download. Marketplace image resizer and Image compressor are the tools that write a new file, and that file can be checked here again. **How can I see the pixel size and the file weight of a photo?** Drop the photo on the checker. Each file gets a card with its width and height in pixels, its file size in megabytes and its format, read in the browser. Below that line, every marketplace rule in the list is marked as passed or failed, with the reason for each failure written next to it. **Can several images be checked at the same time?** Yes. Several files can be dropped or selected together, and each one gets its own card with its measurements and its list of rules. This makes it practical to check a whole folder of product photos before an upload, and to check the files again after they have been resized or compressed. Related [Amazon product image requirements](https://herofab.app/guides/amazon-product-image-size) · [eBay product image requirements](https://herofab.app/guides/ebay-product-image-size) · [Shopify product image requirements](https://herofab.app/guides/shopify-product-image-size) · [Image zoom](https://herofab.app/glossary/image-zoom) More free tools [Product photo checker · Background, framing, cut-off edges and shadows, measured from the photo against each marketplace's main-image rules. · Free · in your browser](https://herofab.app/tools/product-photo-checker) [Marketplace image resizer · Fit a photo to your marketplace's dimensions — padded, never cropped. · Free · in your browser](https://herofab.app/tools/marketplace-image-resizer) [Image compressor · Bring a product photo under a platform's file-size limit, without cropping it. · Free · in your browser](https://herofab.app/tools/image-compressor) [Image to 4K converter · Resize an image to 4K, 3,840 or 4,096 pixels on the longer side, and save it as JPG or PNG. · Free · in your browser](https://herofab.app/tools/image-to-4k) [HEIC to JPG converter · Turn iPhone HEIC photos into JPGs that every marketplace accepts. · Free · in your browser](https://herofab.app/tools/heic-to-jpg) [Seamless texture maker · Turn a photo of fabric, a print or a surface into a tile that repeats without a visible seam. · Free · in your browser](https://herofab.app/tools/seamless-texture-maker) [White background checker · Measure whether the edges of a packshot are pure white #FFFFFF. · Free · in your browser](https://herofab.app/tools/white-background-checker) [AI image label checker · See whether a product image still carries its AI marker: IPTC source type, the keyword for AI-generated people and C2PA credentials. · Free · in your browser](https://herofab.app/tools/ai-image-checker)