Short, practical answers about image sizes, formats and tools. Everything here works with free tools that run in your browser.
How to resize images for InstagramThe right Instagram image sizes and how to resize a photo for a feed post, portrait post, Story or Reel without it being cropped badly.JPG vs PNG vs WebP: which should you use?A plain-English comparison of JPG, PNG and WebP: file size, quality, transparency and when to choose each one.How to compress images without losing qualityPractical ways to make image files smaller while keeping them sharp: the right format, quality setting and size.How to convert HEIC to JPGWhy iPhone photos are HEIC, why some sites reject them, and the easiest ways to convert HEIC to JPG for free without uploading.Image resolution explained: pixels vs DPIWhat image resolution really means, how pixels and DPI relate, and what size to use for screens and for printing.How to make an image background transparentRemove the background from a photo and save it as a transparent PNG, for logos, product photos and profile pictures.How to make app icons for iOS and AndroidWhich icon sizes iOS and Android need, what to avoid, and how to generate a full icon set from one image.How to reduce an image to under 100KB or 200KBGet a photo or scan under 50KB, 100KB, 200KB or 500KB for job, visa and college application forms, without making it unreadable.How to resize a photo for a passport or visaConvert a photo to the pixel size an online passport or visa form asks for, and what to check before you submit it.YouTube thumbnail size and how to resize oneThe standard YouTube thumbnail size, the right shape and format, and how to resize your image to fit.