ConvertDuck

Image Compressor

Reduce image file size while maintaining quality.

Drop PNG, JPG, WEBP files here.

Reduce Image Size Without Losing Quality

Slow-loading images hurt your website's SEO and frustrate users. This tool uses your device's own processing power (via Web Workers) to compress images locally. By eliminating server uploads, we ensure your files never leave your computer—guaranteeing 100% privacy while typically reducing file sizes by 60-80% for faster web performance.

How to Compress Images in 3 Steps

1. Select or Drop Images

Drag up to 50 images at once into the dropzone. We support PNG, JPG, and WebP formats.

Pro Tip: Batch processing works best on desktop computers with multi-core processors.

2. Choose Compression Level

Select 'Balanced' for the best size-to-quality ratio, or 'Aggressive' if file size is your priority.

Use 'Balanced' for blog posts and 'Aggressive' for thumbnails.

3. Download ZIP

Once processing finishes, download all optimized images in a single ZIP file.

System Requirements

Supported FormatsJPG, JPEG, PNG, WebP
Browser SupportChrome 90+, Firefox 88+, Safari 14+, Edge
Max File SizeTested up to 50MB per image (device dependent)
Output FormatOriginal format maintained (inside ZIP archive)

Local Browser vs. Cloud Compression

FeatureThis Tool (Local)Typical Cloud Converters
Data PrivacyFiles never leave deviceFiles uploaded to server
SpeedInstant (Zero Latency)Slow (Upload + Download time)
LimitHardware dependent onlyOften limited (e.g., 20 files/day)
Offline UseYes, fully functionalNo, requires internet

Frequently Asked Questions

Q.Does this tool remove EXIF metadata?▼
Yes, to achieve maximum file size reduction, metadata (like GPS location and camera settings) is stripped during the compression process.
Q.Why is my compressed PNG larger than the original?▼
This rarely happens, but if your original image was already highly optimized, re-encoding it might add overhead. In these cases, our tool automatically discards the result and keeps your original file.
Q.Is it safe for sensitive legal documents?▼
Absolutely. Since no file is ever transmitted over the network, it is mathematically impossible for us or hackers to intercept your documents during the process.
Q.Will this slow down my computer?▼
It might briefly increase CPU usage while processing, especially if you select 'Aggressive' mode for 50+ images, but it frees up resources immediately after completion.