About Image Compressor
Large images slow down websites, bloat email attachments, and waste storage. This Image Compressor reduces the file size of PNG and JPEG images without requiring any desktop software. Upload a photo or screenshot, choose a quality level from 1 to 100, and the tool re-encodes the image using server-side GD compression. JPEG uses quality-based compression; PNG uses a deflate level derived from the slider. You get a preview, the before/after file size, and a one-click download of the optimized image.
How to Use
- Click "Choose File" and select a PNG or JPEG image up to 10 MB.
- Drag the quality slider to balance file size against visual fidelity (75% is a good default).
- Click "Compress Image" to process the upload.
- Review the original vs. compressed size and preview.
- Click the download link to save the compressed image.
Key Features
- ✓ Supports PNG and JPEG images up to 10 MB
- ✓ Quality slider from 1 to 100 for fine-grained control
- ✓ Side-by-side size comparison and savings percentage
- ✓ Instant preview of the compressed result
- ✓ Transparent PNGs keep their alpha channel
- ✓ One-click download of the optimized image
Common Use Cases
- • Shrinking hero images and screenshots for faster page loads
- • Reducing email attachment size below provider limits
- • Preparing images for Slack, Telegram, or chat uploads
- • Optimizing product photos before uploading to a marketplace
- • Saving bandwidth on mobile or metered connections
Frequently Asked Questions
Which image formats are supported?
The tool accepts PNG and JPEG (including .jpg) files up to 10 MB per upload.
Is the compression lossless?
PNG output is lossless — only the deflate level changes. JPEG uses lossy quality-based compression, so lower quality values produce smaller files with more visible artifacts.
What quality level should I use?
75% is a solid default for photos. For web thumbnails 60% is often fine; for high-detail product shots stay at 85–90%.
Are my images stored on the server?
No. Images are processed in-memory during the request and never persisted. Once the response is returned the data is discarded.
Why did the file size barely change?
Images that are already optimized (e.g. exports from modern cameras or Photoshop "Save for Web") have little room left. Try a lower quality value or a smaller resolution upstream.