JPG vs PNG vs WEBP: Which Image Format Should You Use?
Use WEBP for the web when supported, JPG as the fallback for photos, and PNG when you need transparency or crisp text overlays.
Each of the three main web image formats optimizes for a different tradeoff: JPG for photograph compression, PNG for transparency and lossless graphics, WEBP for the smallest file at the best quality. Picking the wrong one either wastes bandwidth or wrecks image quality.
Format comparison at a glance
| Asset | Dimensions | Ratio | Format | Max size |
|---|---|---|---|---|
| JPG | Photos, gradients | No | Lossy | Medium |
| PNG | Logos, screenshots, text | Yes | Lossless | Largest |
| WEBP | Photos, graphics, animation | Yes | Lossy or lossless | Smallest |
JPG (JPEG)
Best for: photographs, complex color gradients, and anywhere you need a small file without transparency.
Strengths: Universal support in every browser, app, and email client. Excellent compression for photos.
Weaknesses: No transparency. Compression is lossy — each save loses more detail. Poor at hard edges, text, and flat colors (produces visible "ringing" artifacts).
PNG
Best for: logos, icons, screenshots, illustrations with text, and anything requiring transparency.
Strengths: Lossless compression preserves every pixel. Supports full alpha transparency. Sharp edges and text stay crisp at any zoom level.
Weaknesses: Large file sizes for photos — often 3-5x larger than the equivalent JPG. No native support for animation (that's APNG, poorly supported).
WEBP
Best for: the modern web — photos and graphics that need the smallest possible file at high quality.
Strengths: 25-35% smaller than JPG for photos, 60-80% smaller than PNG for graphics, at equivalent visual quality. Supports transparency and animation.
Weaknesses: Not supported in Outlook desktop email or some older tools. Instagram, Facebook, and LinkedIn convert WEBP uploads to JPG automatically, defeating the size advantage.
Quick decision guide
- Need transparency → PNG or WEBP
- Photography for social media → JPG (or WEBP, which most platforms re-encode)
- Photography for a website → WEBP with a JPG fallback via
<picture> - Logo, icon, screenshot, anything with text → PNG
- Email image → JPG for photos, PNG for logos (never WEBP — Outlook drops it)
- Smallest possible file, modern browser → WEBP
Use this with every other Gitsize guide
Format choice is cross-cutting. Every platform page and use-case guide on Gitsize applies these three formats. Some quick jumps:
Frequently asked questions
Should I use JPG, PNG, or WEBP?
Use WEBP for the web when supported, JPG as the fallback for photos, and PNG when you need transparency or crisp text. WEBP produces smaller files than JPG at the same visual quality.
Does Instagram accept WEBP?
No. Instagram converts uploads to JPG regardless of format. Upload JPG directly to skip the extra compression step and preserve quality.
Should I use PNG or JPG for a logo?
PNG. Logos need transparent backgrounds and crisp edges that JPG's lossy compression blurs. Export as PNG for web and email, SVG for websites when the source is vector.
Is WEBP supported everywhere?
WEBP is supported in all modern browsers (Chrome, Safari 14+, Firefox, Edge). It is not supported in Outlook desktop email or by some older third-party image tools.
What is the smallest file format?
WEBP is usually smallest — typically 25-35% smaller than JPG and 60-80% smaller than PNG at the same visual quality.
Does converting between formats lose quality?
Converting JPG to PNG doesn't add quality (the artifacts are baked in). Converting PNG to JPG loses transparency and adds compression. Always start from the highest-quality source available.