PNG vs JPG — Complete Comparison for 2026
PNG and JPG are the two most common image formats on the web — and choosing the wrong one costs you either file size or quality. JPG (also written JPEG) uses lossy compression designed for photographs: it discards subtle detail the eye barely notices, achieving file sizes 5–10x smaller than PNG for the same photo. PNG uses lossless compression designed for graphics, logos, and screenshots: every pixel is preserved exactly, with full support for transparency. The right choice depends entirely on what type of image you have.
Quick Answer
PNG and JPG are the two most common image formats on the web — and choosing the wrong one costs you either file size or quality. JPG (also written JPEG) uses lossy compression designed for photographs: it discards subtle detail the eye barely notices, achieving file sizes 5–10x smaller than PNG for the same photo.
Try it now — free, no signup
Your images stay on your device. Nothing is uploaded to any server.
Step-by-Step Guide
4 steps · takes under 1 minute
Identify your image type
Is it a photograph (people, landscapes, products)? Use JPG. Is it a logo, icon, screenshot, or graphic with text? Use PNG.
Check if you need transparency
If the image needs a transparent background (logo on a coloured background, watermark, overlay), use PNG. JPG does not support transparency.
Choose the right conversion
Convert JPG to PNG when you need transparency or lossless editing. Convert PNG to JPG when you need a smaller file for a photograph and transparency isn't needed.
Convert free online
Use the Image Converter to switch between PNG and JPG instantly. No upload, no account, no watermark.
100% Private — Zero Uploads
ImgToolkit runs entirely in your browser using the Canvas API. Your images are never sent to a server, never stored in the cloud, and never seen by anyone else. This makes it safe for sensitive documents, client work, medical imagery, and confidential screenshots.
Pro tip
Pre-optimizing images before uploading to a platform gives you more control than relying on the platform's automatic (and often aggressive) compression.
Format & File Size Comparison
Same 1080×1080px photo processed four ways
| Format | Quality | File Size | Notes |
|---|---|---|---|
| PNG (original) | Perfect | 4.2 MB | No compression — too large for web |
| Compressed PNG | Visually identical | 1.1 MB | −74% — transparency preserved |
| JPG (85% quality) | Excellent | 310 KB | −93% · Best for photos |
| WebP (85%)BEST | Excellent | 205 KB | −95% · Recommended for web |
Based on a 1080×1080px photo. Results vary by image content and complexity.
Related Free Tools
All tools run in your browser — no account or upload needed
Frequently Asked Questions
5 questions answered
Ready to get started?
Free, instant — your files stay on your device. Always.
Convert Between PNG and JPG Free