The Blinkimg blog
Guides, format comparisons and engineering notes, every figure measured on the same engine you use.
Recent articles
- FormatsJPG, JPEG, JFIFIs JPG and JPEG the same? Yes, and here is why both existIs JPG and JPEG the same? Yes. They are two names for one image format, and the file inside is identical: we saved one photo as .jpg and .jpeg and both have the same SHA-256 fingerprint. JPEG is the committee and its standard; .jpg is the three-letter form old PCs needed. Here is where each name comes from, why cameras write .JPG in capitals, and which one to use.Sahadat Husain
- SizesInstagram, Stories, ReelsInstagram story size and profile picture size (2026)The Instagram story size is 1080 × 1920 pixels, a 9:16 frame the shape of a phone screen. That number is Meta’s: its Stories ads help recommends it, and its publishing API recommends 9:16 for story images. Instagram’s own help pages state no story size and no profile picture size. Here is what each Meta page does say, what the guides get wrong, and the files we measured.Sahadat Husain
- FormatsWebP, Chrome, Windows 11What is a WebP file? Why your images save as WebPWhat is a WebP file? An image file format Google released in 2010 that stores photos and graphics in fewer bytes than JPG and PNG. Websites send WebP because it is light, so a picture you save can arrive as .webp even when its address ends in .jpg. Here is what the file holds, why it lands on your disk, and how to open or change it.Sahadat Husain
- 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 and size, in inches and pixelsA US passport photo is 2 × 2 inches, 51 × 51 mm, or 600 × 600 pixels at 300 DPI. The US passport photo requirements start there: one colour photo taken in the last 6 months, with your head filling 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
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