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How to choose the right image format, every time

JPG, PNG, WEBP, GIF, SVG, TIFF — each one was built for a specific job. Pick by content type and you'll rarely get it wrong.

By Ranjith R, Creator & Developer of TryImagerPublished Last updated: 7 min read

There are more image formats in everyday use than most people realise, and each was designed to solve a specific problem well. Choosing between them is less about personal preference and more about answering three questions: does it need transparency, is the content photographic or flat-colour, and where is it going.

Format by content type

ContentBest formatWhy
Photograph, no transparencyJPG or WEBPLossy compression suits photographic noise and gradients
Photograph with transparencyWEBPOnly WEBP compresses colour data lossily while keeping alpha
Logo, icon, flat illustrationSVG if vector, otherwise PNGVector scales infinitely; PNG keeps flat colour crisp
Screenshot with text or UIPNGLossy formats blur sharp text edges
Simple animationGIF or animated WEBPGIF is universally supported; WEBP is smaller
Scan for print or archivalTIFFLossless and supports high bit depth, standard in print workflows

The transparency question comes first

If any part of the image needs to show through to whatever is behind it, JPG is eliminated immediately — it has no alpha channel at all. That leaves PNG or WEBP. Choose WEBP if the transparent image also has photographic detail (a shadow, a gradient, a cut-out with soft edges); choose PNG if it's simple flat colour or you need maximum compatibility with older software.

Vector vs raster: don't rasterise too early

Logos and icons are often created as vector files (SVG, AI, EPS) precisely because they need to work at every size from a favicon to a billboard. Converting to PNG or JPG at some fixed size throws that flexibility away permanently. Keep the vector master file and only export raster versions at the specific sizes you actually need, when you need them.

Common format mistakes that waste bytes or ruin quality

  • Saving a 1600 × 1200 camera photograph as PNG 'for higher quality' — if the photo started as a JPG, converting to PNG restores zero detail while inflating the file to several megabytes.
  • Uploading raw 4032 × 3024 iPhone HEIC files or scanner BMP/TIFF files directly to a CMS or portal — convert to JPG or WebP first so every recipient can open them.
  • Flattening a 512 × 512 transparent PNG logo to JPG without checking the background fill colour — always preview whether white (#ffffff) or a dark fill matches the page where the image will sit.

When you genuinely can't decide

  • Default to WEBP for anything going on a modern website — it handles both photographic and flat content reasonably well.
  • Keep a JPG or PNG fallback only if you know the destination doesn't reliably accept WEBP.
  • If in doubt about transparency, check the image at full zoom against a checkered background in your editor — an invisible alpha edge is easy to miss.

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