Image Compressor
Compress images online for free. Reduce file sizes while maintaining quality. Batch processing up to 250 images with ZIP download.
Optimized for websites
Recommended: 70-85% for best balance
Leave at 0 to keep original dimensions
Batch Processing
Up to 20 images at once
100% Private
Images stay on your device
ZIP Download
Download all at once
Why Choose Forge Compress?
Unlike TinyPNG, Compressor.io and Squoosh, Forge Compress offers a genuinely free, private, and unlimited experience with no strings attached.
100% Free Forever
No hidden fees, no premium tiers, no limits.
Complete Privacy
Everything runs in your browser. We never see your data.
No Signup Required
Use instantly without creating an account.
Unlimited Use
No daily limits, no credits, no restrictions.
Last updated: January 2026 • Built with care by iForge Apps
How Image Compression Works
Image compression reduces file size by encoding pixel data more efficiently. Lossy compression (used for JPEG and WebP) discards data your eyes are unlikely to notice — subtle colour variations, high-frequency noise, and imperceptible gradients. The result looks identical to most viewers but can be 50–90% smaller.
The quality slider controls how aggressively data is discarded. At 90–100%, you'll barely notice any change. At 60–70%, file sizes drop dramatically with minor quality loss visible only when zoomed in. Below 50%, compression artifacts become visible — useful for thumbnails but not hero images.
This compressor runs entirely in your browser using the Canvas API. Your images are never uploaded to any server, and you can process up to 250 images at once.
Format Comparison
| Format | Compression | Transparency | Browser Support | Best For |
|---|---|---|---|---|
| JPEG | Lossy | No | Universal | Photos, complex images |
| PNG | Lossless | Yes | Universal | Logos, screenshots, icons |
| WebP | Both | Yes | 97%+ browsers | Web images (smallest files) |
| AVIF | Both | Yes | ~92% browsers | Next-gen web (even smaller) |
| GIF | Lossless | Limited | Universal | Simple animations only |
What this means for you: For web use, WebP gives the smallest files with good quality. Use JPEG for maximum compatibility, and PNG only when you need transparency.
Quality Guidelines by Use Case
Web (75–80%)
The sweet spot for website images. Significant file size reduction with no visible quality loss for most viewers. Google recommends this range for Core Web Vitals.
Email (65–75%)
Email attachments have size limits. Lower quality keeps images under typical attachment thresholds while remaining clear on screen.
Social Media (80–85%)
Platforms re-compress uploads, so starting with moderate compression avoids double-compression artifacts.
Print (90–100%)
Keep quality high for anything that will be printed. Compression artifacts that are invisible on screen can show in print.
Real-World Compression Results
| Image Type | Original | 75% Quality | Savings |
|---|---|---|---|
| Smartphone photo (12MP) | 4.5 MB | 800 KB | 82% |
| DSLR photo (24MP) | 12 MB | 2 MB | 83% |
| Website hero image | 1.5 MB | 250 KB | 83% |
| Product photo | 3 MB | 400 KB | 87% |
| Screenshot (PNG → JPEG) | 2 MB | 200 KB | 90% |
Screenshots compress especially well because they contain large areas of solid colour. Photos with lots of fine detail (foliage, fabric) compress less aggressively but still see 70-80% reduction.
Related Tools
How to use this tool
Upload images — drag and drop or select up to 250 at once
Choose a preset or adjust quality and format settings
Download compressed images individually or as a ZIP
Common uses
- Reducing image file sizes before uploading to a website or CMS
- Compressing photos for email attachments that stay under size limits
- Batch-optimising product images for faster e-commerce page loads
- Preparing images for social media posts without losing visible quality
- Shrinking screenshot files for documentation or support tickets
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