Image Compressor
Compress PNG, JPG, and WebP images with adjustable quality, format conversion, and dimension resize. Batch process up to 20 images — all client-side. Your images never leave your browser.
Drop images here or click to upload
PNG, JPG, WebP — up to 20 images at once
Scales down larger images, keeps aspect ratio
0 images · 0 compressed
How Image Compression Works
Upload Images
Drag and drop or click to upload PNG, JPG, or WebP images. Multiple files supported for batch processing.
Adjust Settings
Set quality level, choose output format (keep original, WebP, or JPG), and optionally set a max dimension to resize.
Preview & Download
Compare before/after previews, check compression ratios, then download individually or all as a ZIP file.
Format Comparison
| Format | Best For | Compression | Transparency | Typical Savings |
|---|---|---|---|---|
| WebP | Web images, modern browsers | Lossy or lossless | Yes | 25-35% better than JPG |
| JPEG | Photos, complex images | Lossy — excellent | No | 60-80% from original |
| PNG | Graphics, logos, screenshots | Lossless | Yes | Varies (convert to WebP for more) |
Frequently Asked Questions
Is my image uploaded to a server?
No. All compression happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device — no data is sent to any server. This makes it completely private and works offline too.
How many images can I compress at once?
You can batch compress up to 20 images at once. Simply drag and drop multiple files or use the file picker. All images are compressed with the same quality settings and can be downloaded individually or as a ZIP file.
What quality setting should I use?
For photos and social media, 75-85% offers the best balance of quality and file size — typically 60-80% size reduction with minimal visible quality loss. For print or professional use, stay above 90%. For thumbnails or email, 50-70% is usually fine.
Which format should I choose?
Use "Keep Original" to preserve the source format. JPEG is best for photographs and complex images (no transparency). WebP offers 25-35% better compression than JPEG with transparency support — ideal for web use. All modern browsers support WebP.
Why is my PNG file getting larger after compression?
PNG is a lossless format — the browser's Canvas API re-encodes it without guaranteed size reduction. For photos, switch to JPEG or WebP for significant compression. PNG works best for graphics with flat colors, text, and screenshots.
What does the max dimension option do?
It resizes images so neither width nor height exceeds the value you set, while preserving the aspect ratio. Useful for downsizing camera photos (e.g., 6000px) to web-friendly sizes (e.g., 1920px). Set to 0 or leave empty for no resizing.
Can I compare the original and compressed images?
Yes. Click any image in the list to see a side-by-side before/after preview. You'll see both versions with file sizes, dimensions, bytes saved, and compression percentage clearly displayed.