Choosing the wrong image format costs you in file size, visual quality, or compatibility — sometimes all three. Here's the definitive guide to picking the right one every time.
Why Format Choice Matters
Every image format makes a trade-off between file size, quality, transparency support, scalability, and browser compatibility. A photograph saved as a PNG can be 10× larger than the same image as a WebP with identical visual quality. A logo saved as a JPG will look blurry at large sizes where an SVG would stay perfectly sharp. The format decision happens before you export — and changing it later often means redoing the export entirely.
"The best image format is the one that gives you the highest quality at the smallest size for your specific use case. There is no universal answer."
The Formats — At a Glance
JPG uses lossy compression — it permanently discards data to shrink file size. For photographs, this is almost always invisible at quality settings of 80–85%. JPG does not support transparency. Never use JPG for logos, screenshots, or images with sharp text — the compression artifacts will be obvious. Every time you save a JPG it loses more data, so keep your original in a lossless format.
PNG uses lossless compression — no data is discarded, so quality is preserved perfectly. PNG supports full alpha-channel transparency (including semi-transparent edges). The trade-off is file size: a PNG photograph can be 3–5× larger than the same image as a JPG. Use PNG when you need perfect sharpness, transparency, or when the image will be re-edited and re-exported multiple times.
WebP was developed by Google and offers 25–35% smaller files than JPG at the same visual quality, and 25% smaller than PNG with full transparency support. It supports both lossy and lossless compression. Browser support is now universal (Chrome, Firefox, Safari 14+, Edge). For any new web project, WebP should be your default raster format. Use our Image Converter to convert existing JPGs and PNGs to WebP instantly.
SVG (Scalable Vector Graphics) stores images as mathematical descriptions of shapes rather than pixels. This means an SVG logo looks identical at 16px and 1600px — no blurring, no pixelation. SVGs are also editable in a text editor and can be animated with CSS. The limitation: SVG only works for graphics that can be described as vectors (lines, curves, shapes). It cannot represent photographs.
AVIF is the newest format and offers 50% smaller files than JPG at equivalent quality. Browser support reached ~95% in 2024. The encoding is CPU-intensive, so it's not ideal for real-time generation. For static websites and CDN-served assets, AVIF is the future — but WebP remains the safer default for now.
Convert Any Image Format — Free, In Your Browser
Our Image Converter converts between JPG, PNG, WebP, and more. No upload required — your image stays in your browser. Also use the Image Compressor to reduce file size after converting.
The Quick Decision Guide
- Photo for the web? → WebP (or JPG if legacy support needed)
- Logo or icon? → SVG first, PNG as fallback
- Image with transparency? → WebP or PNG
- Screenshot of text or UI? → PNG (preserves sharp edges)
- Email attachment? → JPG (wide compatibility, smaller than PNG)
- Print design? → PNG or TIFF (lossless, high resolution)
One Rule to Remember
When in doubt: use WebP for raster images on the web and SVG for graphics that need to scale. WebP gives you the best balance of quality, file size, and transparency support available today, and its browser support is now functionally universal. Start exporting WebP by default and you'll never regret it.