Bulk Compress PNG Images Online
Reduce PNG file sizes with smart compression — like TinyPNG, but faster.
Drop up to 50 images at once — no install, no sign-up required.
Drop PNG Files to Compress
50 MB per file Up to 50 files 3 parallel 1 credit per 10 MB
Encrypted EU Servers Auto-delete 1h
⚡ Median compression time (last 10k jobs): 476ms
How it works
Drop your files
Drag & drop or choose PNG files. No account required.
We optimize carefully
→ Smaller files, no visible quality loss
→ Encrypted in transit & at rest
→ EU servers, auto-deleted in 1 hour
Download optimized PNGs
→ Individually or as a single ZIP
→ Auto-deleted after 1 hour
How Our PNG Compressor Works
We use smart lossy compression (the same technique as TinyPNG) to dramatically reduce PNG file sizes while keeping changes visually imperceptible. This is how we achieve 50-80% size reductions — far beyond what lossless-only tools can offer.
Our Compression Technique
- Smart Lossy Compression: Like TinyPNG, we use intelligent quantization to convert your PNG to an optimized 256-color palette. The quality difference is visually imperceptible.
- Auto-Detect Graphics vs Photos: Our algorithm detects if your image is a graphic (logo, icon) or photo and adjusts dithering accordingly — crisp edges for graphics, smooth gradients for photos.
- Transparency Preserved: Alpha channels remain intact for perfect transparency support.
- Metadata Removal: Unnecessary metadata is stripped to minimize file size.
Best For
Screenshots, logos, graphics with text, icons, and any image requiring transparency or pixel-perfect quality.
Frequently Asked Questions
Is this compression lossy or lossless?
Our PNG compressor uses smart lossy compression (similar to TinyPNG). We convert your image to an optimized 256-color palette, which typically reduces file sizes by 50-80%. The quality difference is visually imperceptible for most images — that's why TinyPNG uses the same technique. For truly lossless compression (no data change at all), you'd need specialized tools like oxipng or pngcrush, which achieve smaller reductions (typically 5-15%).
Does PNG compression preserve transparency?
Yes. Transparency is fully preserved through compression. Semi-transparent areas may show slight changes at the pixel level due to palette optimization, but these are virtually undetectable. Your transparent backgrounds, shadows, and overlays will work exactly as expected.
Why are PNG files so large?
PNG files are larger because they use lossless compression—every pixel is preserved exactly. Common causes of large PNGs: 1) High color depth (24-bit or 32-bit), 2) Large dimensions, 3) Complex images with many colors, 4) Embedded metadata and color profiles. Our compressor addresses all of these.
How does smart lossy PNG compression work?
Our compressor uses libimagequant (the same library behind TinyPNG) to intelligently reduce your PNG's color palette from millions of colors to an optimized 256. For photos, we apply subtle dithering to preserve smooth gradients. For graphics and logos, we use crisp edges without dithering. The result: dramatically smaller files that look identical to the naked eye. We also run oxipng post-processing for an extra 5-10% lossless optimization on top.
Can I compress PNG screenshots?
Yes, screenshots compress very well! Screenshots typically have large areas of solid color, text, and UI elements—all of which compress efficiently with PNG. Expect 20-50% reduction on typical screenshots. For photos, consider converting to JPG instead for better compression.
How much can PNG compression reduce file size?
Results vary by image content. Simple graphics (logos, icons, diagrams): 30-70% reduction. Screenshots: 20-50% reduction. Photos saved as PNG: 10-30% reduction (consider JPG for photos). Images with fewer colors and larger solid areas compress better.
Should I use PNG or JPG for web images?
Use PNG for: Logos, icons, screenshots, graphics with text, images with transparency, and anywhere pixel-perfect quality matters. Use JPG for: Photographs and complex images where small quality loss is acceptable. For the best of both worlds, consider WebP which supports both transparency and efficient photo compression.
What are the file size and batch limits?
| Tier | Max File Size | Max Files/Batch | Parallel Jobs |
|---|---|---|---|
| Guest/Free | 50 MB | 50 files | 3 at once |
| Pro | 1 GB | 1000 files | 6 at once |
Note: Batch and parallel processing limits apply site-wide across all compressors.
How are credits calculated for compression?
Cost: 1 credit per 10 MB
How it works:
- Files up to 10 MB: 1 credit
- 11-20 MB: 2 credits
- 21-30 MB: 3 credits
- 31-40 MB: 4 credits
Example: A 5 MB file = 1 credit. A 95 MB file = 10 credits.
Why per-megabyte? Larger files require more processing resources (memory, CPU, bandwidth, storage).
What are my daily and monthly credit limits?
Credit allocations vary by account tier:
| Tier | Credits | Reset |
|---|---|---|
| Guest | 50/day | Midnight UTC |
| Free | 50/day | Midnight UTC |
| Pro | 12,000/month | Billing cycle |
Note: Credits are based on file size (1 credit per 10 MB). Guest/Free users have 50 credits per day. Pro users have 12,000 credits per month.
Answers at a Glance
Quick answers to common questions.
- Are my files secure?
- How long do you keep my files?
- What metadata do you keep?
- What happens after I drop a file?
- Why is compression so fast?
- How do you measure performance?
- What are the exact limits for each plan?
- Can I compress files in bulk?
- Why did my file fail to compress?
- Do you use my files to train AI?
Need to get more done? Pro starts from $5.
1 GB files 1,000 per batch Priority queue Web + API
No subscription required.
What's New in PNG Compressor
Latest improvements to this compressor
Last updated January 5, 2026
Jan 5, 2026
Added Resize options.
Dec 26, 2025
Initial release with lossless compression.