JPEG vs PNG: Which Is Smaller? Size Comparison [2026 Data]
Juraj Cukan
Founder, CEO & Lead Developer
Juraj is a Computer Science student at Comenius University in Bratislava, Slovakia, and the sole creator of FileSlim. Frustrated with inefficient and expensive compression tools, he built FileSlim from the ground up as a free, privacy-first alternative. Working entirely alone, Juraj developed every aspect of the platform—from the compression algorithms to the user interface—ensuring complete browser-based processing that never uploads files to servers. His work has helped users worldwide compress over 50 million files while maintaining complete privacy and achieving 60-90% file size reductions.
Quick Answer
JPEG uses lossy compression (smaller files, slight quality loss) - best for photos and complex images. PNG uses lossless compression (larger files, perfect quality) - best for graphics with text, logos, or transparency. Choose JPEG for photos, PNG for graphics, and WebP for modern web use.
— JPEG or PNG - which should I use?
50-70% smallerJPEG achieves 50-70% smaller files than PNG for photographs due to lossy compression that removes imperceptible details.
100% losslessPNG is ideal for graphics with text, logos, or transparency because it uses lossless compression preserving every pixel.
JPEG vs PNG: Complete Comparison
| Feature | JPEG | PNG |
|---|---|---|
| Compression Type | Lossy | Lossless |
| File Size | 50-70% smaller | Larger |
| Transparency Support | ||
| Best For Photos | ||
| Best For Graphics | ||
| Animation Support |
How Does JPEG Compression Work?
JPEG (Joint Photographic Experts Group) uses lossy compression, which means it removes data your eyes can't easily detect. It works by:
- Converting images to a color space that separates brightness from color information
- Dividing the image into 8x8 pixel blocks
- Removing high-frequency details (subtle variations) that humans barely notice
- Storing only the essential information needed to recreate a visually similar image
Result:
At 80-85% quality, JPEG files are 50-70% smaller than PNG with imperceptible quality loss for photographs.
How Does PNG Compression Work?
PNG (Portable Network Graphics) uses lossless compression, preserving every pixel perfectly. It works by:
- Finding patterns and repetitions in the image data
- Storing those patterns more efficiently without removing information
- Supporting transparency by including an alpha channel (opacity data)
- Maintaining perfect quality even after multiple saves and edits
Result:
PNG files are larger but maintain 100% perfect quality. Ideal for graphics, screenshots with text, and logos.
When to Use JPEG vs PNG vs JPEG XL
Use JPEG XL For (Safari 17+):
- Next-generation photos with 20-60% better compression than JPEG
- Modern browsers (Safari 17+) for future-proof compression
- When you want both superior quality AND smaller file sizes
- Automatically tested with FileSlim's "Best Algorithm" mode
Use JPEG For:
- Photographs and camera images
- Complex images with many colors
- Social media uploads
- Email attachments
- Website hero images and galleries
- When file size matters more than perfect quality
Use PNG For:
- Logos and brand assets
- Icons and UI elements
- Screenshots with text
- Images requiring transparency
- Infographics and diagrams
- When perfect quality is essential
Real-World File Size Examples: JPEG vs PNG
Here are actual file size comparisons for common image types, showing exactly how much smaller JPEG is compared to PNG:
| Image Type | Original PNG | JPEG 85% | JPEG 70% | Savings |
|---|---|---|---|---|
| Portrait Photo (3000×4000) | 24 MB | 2.4 MB | 1.2 MB | 90-95% |
| Product Photo (1080×1080) | 3.5 MB | 350 KB | 180 KB | 90-95% |
| Screenshot with Text | 800 KB | 450 KB | 280 KB | 44-65% |
| Logo (500×500) | 45 KB | 120 KB | 80 KB | PNG is smaller! |
Key takeaway: JPEG is 90-95% smaller for photos, but PNG can be smaller for simple graphics with flat colors. Always choose the format based on your image content.
Is JPEG XL Better Than Both JPEG and PNG?
JPEG XL (JXL) is a next-generation image format designed to replace both JPEG and PNG. It combines the best features of both formats:
- 20-60% smaller than JPEG at the same visual quality
- Supports lossless compression like PNG, with better compression ratios
- Supports transparency (alpha channel) like PNG
- Progressive decoding for fast web loading
- Lossless JPEG recompression - convert existing JPEGs to JXL and back without any quality loss
Browser Support (2026):
Safari 17+, limited support in other browsers. FileSlim's Best Algorithm mode automatically tests JPEG XL when your browser supports it, ensuring you always get the smallest possible file.
Want to learn more? See our comparison of compression tools for JPEG XL benchmarks, or try our lossless compression guide.
Quick Decision Guide
Is it a photograph?
→ Yes: Use JPEG at 80-90% quality
→ No: Continue to step 2
Does it have text, sharp lines, or transparency?
→ Yes: Use PNG
→ No: Continue to step 3
Is it for modern web use?
→ Consider WebP or JPEG XL (better compression than both)
Is it for Instagram or social media?
→ Use JPEG at 85-90% quality. See our Instagram guide →
Frequently Asked Questions
Should I use JPEG or PNG for my website?
Use JPEG for photographs and complex images with many colors. Use PNG for logos, icons, images with text, or anything requiring transparency. For photos, JPEG at 80-85% quality provides 50-70% smaller files with imperceptible quality loss.
Which is better for photos - JPEG or PNG?
JPEG is better for photos. It's specifically designed for photographic images and produces much smaller files (50-70% smaller than PNG) while maintaining excellent visual quality. PNG is overkill for photos unless you need transparency.
Can I convert PNG to JPEG without losing quality?
If the PNG contains a photograph, converting to JPEG at 90-95% quality will produce imperceptible quality loss with much smaller file size. However, if the PNG has transparency or is a graphic with sharp edges (like text or logos), keep it as PNG.
Why are my PNG files so much larger than JPEG?
PNG uses lossless compression, meaning it preserves every pixel perfectly. JPEG uses lossy compression, discarding information your eyes won't notice. For a typical photo, PNG might be 5-10 MB while JPEG at 85% quality is 500 KB-1 MB with no visible difference.
When should I definitely use PNG instead of JPEG?
Use PNG when you need: 1) Transparency (logos, icons), 2) Sharp text or lines (screenshots, infographics), 3) Images that will be edited multiple times (JPEG degrades with each save), or 4) Graphics with few colors (PNG can be smaller than JPEG for simple graphics).
What about WebP and JPEG XL - are they better than both?
WebP provides 25-35% better compression than JPEG at the same quality and supports transparency like PNG. JPEG XL offers 20-60% better compression than JPEG with both lossy and lossless modes, plus transparency and animation support. These are the best modern choices for web use, though JPEG and PNG have better compatibility with older software and devices. FileSlim's 'Best Algorithm' mode automatically tests these formats when supported by your browser.
Does JPEG quality 100% mean no compression?
No, JPEG 100% still uses lossy compression - it's just the highest quality setting. Even at 100%, JPEG is smaller than PNG. For truly lossless compression, you must use PNG or WebP lossless mode.
Can I compress PNG files without losing quality?
Yes! PNG optimization tools like FileSlim can reduce PNG file sizes by 10-30% without any quality loss by removing unnecessary metadata and optimizing the compression algorithm. This is still lossless compression.
Why are my JPEG images smaller but PNG images larger?
JPEG achieves compression by removing data your eyes can't easily detect (lossy). PNG preserves every pixel perfectly (lossless), so it doesn't throw away any information. For photographs, JPEG is more efficient because photos have natural variation that compresses well with lossy techniques.
When should I convert PNG to JPEG?
Convert PNG to JPEG when you have photographs saved as PNG. Photos don't need lossless compression - JPEG at 90% quality looks identical to PNG but is 5-10x smaller. Keep PNG only for graphics with transparency, logos, screenshots with text, or images that will be edited multiple times.
Can I convert JPEG to PNG to improve quality?
No, converting JPEG to PNG won't recover lost quality. JPEG compression is permanent - once data is removed, it's gone. Converting to PNG just creates a larger file with the same quality. Only convert JPEG to PNG if you need to add transparency or further edit the image without additional quality loss.
What's better for website performance - JPEG or PNG?
For most websites, use JPEG for photos (80-85% quality) and PNG for logos/icons. JPEG files are 50-80% smaller for photos, dramatically improving page load speed and SEO. PNG's larger file sizes slow down pages unless used specifically for graphics requiring lossless quality or transparency.
Is a PNG smaller than a JPEG?
No, PNG files are almost always larger than JPEG for photographs. A typical photo saved as PNG might be 5-24 MB, while the same photo as JPEG at 85% quality is only 350 KB-2.4 MB - that's 90-95% smaller. However, for simple graphics with flat colors (logos, icons, diagrams), PNG can actually be smaller than JPEG because PNG's lossless compression handles uniform color areas more efficiently.
What is the difference between JPEG and PNG compression?
JPEG uses lossy compression - it permanently removes visual details your eyes can't easily detect, achieving 50-70% smaller files. PNG uses lossless compression - it reduces file size by finding patterns in the data without removing any information, preserving every pixel perfectly. The key trade-off: JPEG produces much smaller files for photos, while PNG maintains perfect quality for graphics, text, and transparency.
Which format should I use for Instagram - JPEG or PNG?
Use JPEG for Instagram. Instagram automatically converts all uploaded images to JPEG anyway, so uploading PNG just means a larger upload with no quality benefit. Compress your photos to 1080x1080px at 85-90% JPEG quality before uploading for the best Instagram results. See our complete Instagram compression guide for platform-specific tips.
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