Compress Images Without Losing Quality
Reduce the file size of your JPG, PNG, and WEBP images by up to 85% using local machine learning. Your files never leave your computer.
Drop image here or click to browse
Compress any image in 3 steps
1. Upload
Drag and drop your images into the local browser sandbox.
2. Set quality
Adjust the quality slider to find the perfect balance for your needs.
3. Download
Instantly save the optimized file back to your device.
Live Comparison
See exactly what you're getting before you hit download. Our side-by-side comparison engine renders the compressed result in real-time, letting you spot any artifacts before finalizing your file.
- check_circle Real-time artifact detection
- check_circle Pixel-perfect preview zoom
Smart Format Conversion
Don't just compress—optimize. Our tool can automatically convert your heavy JPGs and PNGs into modern WebP or AVIF formats, which offer superior quality at much smaller file sizes for modern browsers.
Privacy by Design
Your photos never leave your device. Unlike other online compressors that upload your data to their servers, RefineDoc performs all processing locally in your browser using WASM technology.
Compress for every workflow
Web & SEO
Boost Core Web Vitals and page speed scores by serving lightweight assets to users.
E-Commerce
Handle massive product catalogs without slowing down your store's shopping experience.
Email Marketing
Avoid the "clipped" message warning in Gmail by keeping your newsletter images tiny.
Social Media
Optimize high-res photos for lightning-fast uploads to Instagram, LinkedIn, and X.
Photography
Archive and share preview galleries without eating up your cloud storage space.
Client Delivery
Send high-quality drafts to clients through WhatsApp or Slack without pixelation.
Why RefineDoc?
| Feature | RefineDoc Best Choice | TinyPNG | Squoosh | Compressor.io |
|---|---|---|---|---|
| No server upload | check_circle | cancel | check_circle | cancel |
| Batch processing | check_circle | check_circle | cancel | check_circle |
| Quality Control Slider | check_circle | cancel | check_circle | check_circle |
| No file size limits | check_circle | cancel | check_circle | cancel |
| 100% Forever Free | check_circle | cancel | check_circle | cancel |
Frequently Asked Questions
Compress your images — free, private, instant
Join thousands of professionals optimizing their workflow with RefineDoc's local-first tools.