Image Compressor
Compress images to reduce file size.
About This Tool
Image Compressor is a free online tool that reduces image file size by re-encoding photos with a quality slider you control. Simply upload any image, drag the quality slider to your preferred balance of size and fidelity, and download the compressed result — all without uploading to any server. It shows the exact file size savings before you commit to downloading.
Compression uses the browser's Canvas API to re-encode the image as JPEG at your chosen quality level. Processing is entirely local — your images stay on your device. A side-by-side live preview lets you spot any visible quality degradation at your chosen compression level before saving. The savings counter updates in real time as you adjust the slider.
Image Compressor is heavily used by web developers optimizing images for faster page loads, bloggers reducing photo sizes before CMS upload, and ecommerce merchants keeping product image file sizes within platform limits. For a typical blog photo, 75% quality reduces file size by 40–60% with negligible visible difference.
Drag & drop files here or click to browse
How to Use
- 1
Upload the image you want to compress by dragging and dropping or clicking the upload area.
- 2
Adjust the quality slider — lower values give smaller files, higher values give better quality.
- 3
Click download to save the compressed image. The savings percentage is shown in the stats.
- 4
Compare the original and compressed images side by side to verify acceptable quality.
- 5
If the result is too blurry, increase the quality slider and download again.
Features
Adjustable Quality
Fine-tune compression with a quality slider from 1% to 100% to balance file size and visual fidelity.
File Size Savings
See the original and compressed file sizes, plus the percentage saved, before downloading.
Live Preview
Preview the compressed image side by side with the original to check quality before saving.
No Upload Required
Compression runs entirely in your browser. Your images are never sent to a server.
Common use cases
- ›Reduce photo file sizes before uploading to WordPress, Shopify, or other CMS platforms.
- ›Optimize images for faster web page load times and better Core Web Vitals scores.
- ›Compress photos to meet email attachment size limits or file upload restrictions.
- ›Batch-reduce image size for mobile app assets where bandwidth and storage matter.
Read our guide
Image Compressor — Complete Guide →FAQ
How does compression work?
It re-encodes the image as JPEG with your chosen quality level, reducing file size.
What quality should I use?
70-80% gives a good balance between file size and visual quality for most images.
What image formats can be compressed?
The compressor accepts JPEG, PNG, WebP, and most common web image formats. Output is always JPEG for maximum compression efficiency.
How much file size reduction can I expect?
Results vary by image content. Photographic images typically compress to 30–70% of their original size at 75% quality with minimal visible quality loss.
Will compressing a PNG image affect transparency?
Yes. Since output is JPEG, transparency will be lost. Transparent areas will be filled with a white background. Use this tool for photographic content, not logos or graphics requiring transparency.