Image Tools
Image Compressor
Use this Image Compressor to upload one image, choose a compression level, and export a lighter version locally in your browser. Images stay on your device during processing.
Image Compressor uploader
Upload one image, choose a compression level and output format, and export a lighter version locally in your browser.
Processed image
Prepare output
Upload one image, adjust the tool settings, and export a processed image locally in your browser.
Compression results depend on the original image format, dimensions, and visual detail. Some files may shrink significantly, while others may change only a little.
Source size
No image loaded
Output size
Not generated yet
Format
Not generated yet
Size change
Not generated yet
Explore more visual utilities in Image Tools or browse the main Tools Directory.
How this calculator works
This tool redraws your image in the browser and exports it again at a lower-quality compression setting. That can reduce file size without needing a server-based workflow.
Results depend on the source image, its dimensions, and the output format you choose.
What the result means
A successful result means a new downloadable image has been created with the compression level you selected. The result area compares source size and output size.
Sometimes the savings are substantial, and sometimes they are only modest. That variation is normal.
Important limitations
Compression is always a tradeoff. Lower file sizes can reduce sharpness, introduce artifacts, or flatten subtle image detail.
Some already-optimized images may not shrink much, and some formats behave better than others depending on the source.
When to use this calculator
Use Image Compressor when you need lighter uploads, faster sharing, or more practical image sizes for websites, documents, or email.
Good companions include Image Resizer, WebP Converter, and the Image Tools hub.
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FAQs
Are images uploaded to a server while compressing?
No. Images are processed locally in your browser and are never uploaded by this tool.
Will high compression always look worse?
Often yes. Higher compression can save more space, but visual artifacts and reduced sharpness become more likely.
Why do some files shrink more than others?
The amount of savings depends on dimensions, visual detail, source format, and whether the original was already optimized.
Can compression ever increase file size?
Yes. Some images are already highly optimized, and rebuilding them may not always reduce size.
Is this tool a substitute for full design software?
No. It is a practical browser-based compressor for everyday file-size reduction.