Whether you're a web developer optimizing page load speed, a blogger compressing images for WordPress, or someone trying to fit a photo under an email attachment limit — you need a reliable image compressor.
But with dozens of options available, how do you choose? We've tested the most popular tools and compared them across the metrics that actually matter.
What Makes a Great Image Compressor?
We evaluated tools based on five criteria:
- Compression quality: How much size reduction without visible quality loss?
- Speed: How fast is the compression process?
- Privacy: Does the tool upload your files to a server, or process locally?
- Format support: JPG, PNG, WebP, SVG, HEIC?
- Ease of use: How many clicks from upload to download?
Top Image Compressors Compared
| Feature | Toolsgn (Us) | TinyPNG | Squoosh | iLoveIMG |
|---|---|---|---|---|
| Processing | 100% Browser | Server-side | Browser | Server-side |
| Privacy | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Batch Upload | ✅ Yes | ✅ (20 max) | ❌ No | ✅ Yes |
| Target Size | ✅ Custom KB | ❌ No | ✅ Yes | ❌ No |
| Formats | JPG, PNG, WebP, HEIC | PNG, JPG, WebP | All | JPG, PNG, GIF |
| Signup Required | ❌ No | ❌ No | ❌ No | ❌ No |
| Watermark | ❌ None | ❌ None | ❌ None | ❌ None |
| Free Limit | Unlimited | 20 images/batch | Unlimited | 15 images |
Why Toolsgn Image Compressor Stands Out
Our Image Compressor is built differently from most online tools:
1. Runs Entirely in Your Browser
Your images never leave your device. The compression happens using WebAssembly-powered algorithms right in your browser tab. This means:
- No upload wait time (especially important for large files)
- Complete privacy — we literally cannot see your images
- Works offline once the page is loaded
2. Custom Target Size
Need a photo exactly under 20KB for a government form? Under 100KB for a web page? Our tool lets you set a specific target size and automatically adjusts compression to hit it precisely. Try our specific size tools:
3. Multiple Format Support
Beyond basic JPG and PNG, we support:
- WebP: Modern format with superior compression. Convert with our WebP Converter
- HEIC: iPhone format. Convert using HEIC to JPG
- SVG: Vector format conversion via SVG to PNG
When to Use Which Tool
- For government forms (exact KB target): Toolsgn Image Compressor
- For web development (quality-focused): Squoosh or Toolsgn
- For batch processing (20+ images): Toolsgn (no batch limit)
- For quick one-offs: Any of the above works fine
Tips for Getting the Best Compression
- Resize before compressing: A 4000×3000 pixel photo compressed to 100KB will look worse than a 1200×900 photo at 100KB. Use our Image Resizer first.
- Choose the right format: Photos = JPG. Graphics/logos = PNG. Modern web = WebP.
- Use progressive JPG: Progressive JPGs load faster on web pages and can be slightly smaller.