Compress Image Online — Reduce File Size for Free
Easily compress your images to a target file size without losing visible quality. Our free online image compressor works entirely in your browser — no uploads, no servers, completely private. Whether you need to compress images for email attachments, website optimization, or social media uploads, NanoImage makes it simple. Just upload your image, set your target size (default 200KB), and download the optimized result instantly. Supports JPG, PNG, and WebP formats with smart quality adjustment to achieve the best balance between file size and image quality.
Drag & drop your image here, or click to browse
Supports JPG, PNG, WebP, GIF, BMP
Upload up to 10 images at once
How to Use
- 1
Upload your image by dragging it into the upload area or clicking to browse your files.
- 2
Set your desired target file size in KB (default is 200KB). Adjust the quality slider if needed.
- 3
Click "Compress" and download your optimized image instantly.
Frequently Asked Questions
How does the image compression work?
NanoImage uses smart quality adjustment via your browser's Canvas API. It iteratively reduces the JPEG/WebP quality parameter until the image reaches your target file size, maintaining the best possible visual quality.
Is my image uploaded to any server?
No! All processing happens 100% locally in your browser. Your images never leave your device, ensuring complete privacy and security.
What image formats are supported?
NanoImage supports JPG/JPEG, PNG, WebP, GIF, and BMP input formats. Output is typically JPEG or WebP for optimal compression.
Can I compress multiple images at once?
Yes! You can upload and compress up to 10 images simultaneously. Each image will be compressed to your specified target size.