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PNG vs JPEG: Image Format Comparison

Compare PNG and JPEG image formats for web use. Side-by-side comparison of compression, quality, transparency, and best use cases for each format.

Item 1

PNG

PNG (Portable Network Graphics) is a lossless image format that supports transparency and produces high-quality images with no compression artifacts.

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  • Lossless compression preserves every detail
  • Full transparency support (alpha channel)
  • No compression artifacts or quality loss
  • Perfect for screenshots and graphics with text
  • Supports high color depth (48-bit)
Item 2

JPEG

JPEG (Joint Photographic Experts Group) is a lossy image format that achieves high compression ratios by discarding less visible detail. The most widely used image format on the web.

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  • Much smaller file sizes than PNG
  • Supports millions of colors natively
  • Universally supported across all devices
  • Adjustable quality/compression trade-off
  • Ideal for photographs and complex images

Side-by-Side Comparison

AspectPNGJPEGWinner
CompressionLossless — no quality lossLossy — smaller files with some quality lossDraw
File sizeLarger files (2-5x JPEG)Compact files, adjustable qualityJPEG
TransparencyFull alpha channel supportNot supportedPNG
PhotographsLarge file sizesExcellent quality-to-size ratioJPEG
Graphics and textSharp and artifact-freeBlurring and artifacts around textPNG

Verdict

Use PNG for images that need transparency, contain text or sharp edges (screenshots, logos, diagrams), or require pixel-perfect accuracy. Use JPEG for photographs and complex images where file size matters more than perfect fidelity.

Recommended: Depends on image type

Frequently Asked Questions

Can PNG be smaller than JPEG?

Rarely. PNG uses lossless compression and is typically 2-5 times larger than JPEG at equivalent quality. PNG excels for images with large areas of solid color.

Which format is better for web performance?

JPEG generally wins for photographs. Consider WebP as a modern alternative that combines PNG's transparency with JPEG's compression efficiency.