Top Free Online Image Compressors Compared
We tested and compared the most popular tools in 2025 to help you decide which one fits your needs best.
Tools Reviewed
We've looked at the following popular tools:
- ImagZilla
- TinyPNG
- CompressJPEG
- ILoveIMG
- ImageCompressor.com
1. ImagZilla — Fast, Simple & Feature-Rich
ImagZilla is a versatile free online image compressor that combines speed, ease of use, and advanced features. You can compress JPEG, JPG, PNG, and WebP files in bulk, convert between formats, and maintain excellent image quality.
✅ Pros:
- Supports JPEG, JPG, PNG, WebP
- Drag-and-drop + batch compression
- Built-in format converter (JPG to PNG, JPEG to WebP, etc.)
- Free with no watermark
- Great balance of size reduction and quality
❌ Cons:
- Still growing
- Lesser-known than some older tools
Best For:
Bloggers, photographers, web developers, and anyone needing bulk conversion and compression with quality control.Compress Images Now with ImagZilla →
TinyPNG
TinyPNG specializes in lossy compression while keeping quality visually appealing.
✅ Pros:
- Easy to use
- High-quality lossy compression
- Offers WordPress plugin
❌ Cons:
- Max 20 images per session on free version
- Limited format support (JPEG, PNG)
Best For:
Quick, high-quality compression of individual files.
CompressJPEG / CompressPNG
These tools are straightforward, offering compression for one file format at a time.
✅ Pros:
- Simple interface
- Format-specific optimization
❌ Cons:
- Must use different pages for different formats
- Fewer options for batch tasks
Best For:
Casual users compressing one image type at a time.
ILoveIMG
ILoveIMG is more than a compressor — it’s a complete image editing suite.
✅ Pros:
- Image compression, resizing, editing in one place
- Batch support
❌ Cons:
- Heavier interface
- Ads can clutter the UI
Best For:
Users who want a multi-tool beyond compression.
ImageCompressor.com
This is a quick, no-sign-up tool for basic image compression.
✅ Pros:
- No login required
- Quick results
❌ Cons:
- Limited control over compression quality
- No additional features like format conversion
Best For:
Fast one-time compression without bells and whistles.
Image Compression Tool Comparison
| Tool | Formats | Batch Support | Conversion | Quality Control | Best For |
|---|---|---|---|---|---|
| ImagZilla | JPEG, JPG, PNG, WebP | ✅ (50+) | ✅ | ✅ | Multi-purpose use |
| TinyPNG | JPEG, PNG | Limited | ❌ | ✅ | Bloggers, Designers |
| CompressJPEG | JPEG only | Limited | ❌ | ❌ | Quick JPEG compression |
| ILoveIMG | JPEG, PNG | Limited | ❌ | ✅ | Casual editors |
| ImageCompressor | JPEG, PNG | ❌ | ❌ | ❌ | One-off compression |
Our Conclusion: Which Tool Is Best for You?
The best tool ultimately depends on your specific needs. Here's a quick summary to help you decide:
- If you want an all-in-one free tool with multiple format support, ImagZilla is your best bet for a powerful and versatile experience.
- For lightweight and quick use with a focus on quality, TinyPNG is a reliable classic that gets the job done efficiently.
- If you're compressing one format and need minimal fuss, CompressJPEG works perfectly without any unnecessary features.
- Need extras like resizing or editing? ILoveIMG covers more ground, acting as a complete image utility suite.
- For fast, one-time compression without any bells and whistles, ImageCompressor.com is a great choice.