The Blinkimg blog
Guides, format comparisons and engineering notes, every figure measured on the same engine you use.
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- SizesSocial media, Aspect ratio, Safe zonesSocial media image sizes cheat sheet: ratios, safe zones and limitsThis social media image sizes cheat sheet lists every placement nine networks size on their own pages, read on 2 October 2026. Each row gives the pixels, the shape, the file limit and the source. The shapes repeat: 1:1 for profile pictures, 4:5 and 3:4 in the feeds, 9:16 for Stories and Reels, 16:9 for YouTube, and strips from 2.7:1 to 5.91:1 for banners. We fitted one photo to every size to show what each keeps.Sahadat Husain
- EngineeringImage optimization, srcset, Lazy loadingImage optimization for the web: formats, sizes and lazy loadingImage optimization means sending each screen the smallest image file that still looks right. That comes down to the right format, the width the screen draws, a compression budget, and loading at the right moment. We ran one 9.8 MB camera photo through each step and watched what Chromium downloaded.Sahadat Husain
- FormatsImage formats, JPG, PNGBest image format: JPG, PNG, WebP, AVIF, HEIC and GIF explainedThe best image format depends on what the picture is and where it goes. For a photo on your own website, use AVIF with WebP or JPG as the fallback. For a photo you send, use JPG. For a screenshot, a logo or anything see-through, use PNG. For animation, use WebP. We saved one photo, one card of text and one flat graphic in every format to show why.Sahadat Husain
- SizesUS passport, Passport photo, 2 × 2 inchesUS passport photo requirements: size, smile, clothesThe US passport photo requirements start with one colour photo, 2 × 2 inches, taken in the last 6 months. Your head fills 1 to 1 3/8 inches of it, against plain white or off-white, with no glasses. You can smile with your mouth closed and wear everyday clothes, but not a uniform, camouflage or a hat. Here is every rule from the State Department’s own pages, plus what its staff manual and the online upload add.Sahadat Husain
- GuidesFile size, iPhone, AndroidHow to reduce image file size on any deviceHow to reduce image file size: give the image fewer pixels, save it at a lower quality, or save it in a newer format. Every phone and computer has a built-in way to do each, and this guide gives each maker's own steps. The sizes are our engine's, measured on our 9.8 MB camera photo, our 1920 × 1280 reference photo and a real iPhone 12 Pro HEIC.Sahadat Husain
- FormatsHEIC, HEIF, iPhoneWhat is an HEIC file, and how to open one anywhereWhat is an HEIC file? It is a photo saved in HEIF, the High Efficiency Image File Format, with the picture compressed by HEVC, the H.265 video codec. iPhones have saved photos this way since iOS 11 in 2017. Apple devices and Safari open a HEIC directly; Windows, Android and other browsers need an extension, an app or a converted copy. Here is each route, and what a real iPhone HEIC holds inside, measured in four other formats.Sahadat Husain
- FormatsAVIF, AV1, Windows 11What is an AVIF file? Open it, convert it, or keep itWhat is an AVIF file? An image compressed with the AV1 video codec and stored in a HEIF container. Websites send AVIF because it is small, so a picture you save can arrive as .avif, and an older app may refuse it. Here is what the file holds, how to open it anywhere, and when to convert it.Sahadat Husain
- ProductPrivacy, Storage, The 24 hoursIs it safe to compress images online? What happens to your photoIs it safe to compress images online? Yes, when the tool says in writing how it handles your photo and deletes it on a clock you can check. Here are the questions worth asking any tool, and our answers, with the mechanism behind each.Sahadat Husain
- GuidesForms and portals, Exam forms, ResizePhoto not uploading in online form? Why a 50 KB file still failsYour photo is not uploading in the online form, and it is already under the cap? The byte cap is only one of the checks. The pixels, a minimum size, the format and the picture itself are the others. Here is how to pass each one, with the numbers from our own files.Sahadat Husain
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