Free Online Image Compressor

Reduce image file size while maintaining quality. See before/after comparison.

Settings
Adjust compression parameters

Click to add images

80%

Lower = smaller file, less quality

1920px
Compressed Images (0)
Before and after comparison

Upload images to compress

How the Image Compressor Works

Our image compressor uses the HTML5 Canvas API to re-encode your images at a configurable quality level. This lossy compression removes visual data that is less noticeable to the human eye, resulting in smaller file sizes.

Before/After Comparison

See exactly how much space you save with each image. The original and compressed file sizes are shown side by side, along with the percentage reduction achieved.

Privacy First

All compression happens locally in your browser. Your images are never uploaded to any server, making this tool safe for sensitive photos and documents.

Frequently Asked Questions

We use the HTML5 Canvas API to re-encode your images at a lower quality setting. For JPEG images, this removes some visual data (lossy compression). PNG images are converted to JPEG for better compression.

Yes, but the impact depends on your quality setting. At 80% quality, most images look identical to the original. At 60%, you may notice slight artifacts. The preview shows exactly what you will get.

We support JPEG, PNG, WebP, and most common image formats. All images are output as JPEG for optimal compression, unless you choose PNG output for transparency.

Absolutely. All compression happens 100% locally in your browser using the Canvas API. Your images are never uploaded to any server. Close the tab and all data is gone.

More Free Online Tools

Text Cleaner
Strip formatting, fix quotes, convert case
QR Generator
Create QR codes, download PNG/SVG
Unit Converter
PX to REM, Hex to RGB, Unix to Date
JSON Formatter
Format, minify, validate JSON
Base64 Encoder
Encode and decode Base64
JSON to CSV
Convert JSON to CSV format