Will image compression reduce quality?
Compression can reduce quality slightly, but you can control the tradeoff with the quality slider before downloading the result.
All Tools
Image Compressor
Reduce file size for uploads, sharing, or faster loading with the current browser-side compression flow.
Current scope
This tool currently processes one image at a time in your browser. The current file limit is 20MB. This statement covers the current /tools image flow, including poster-prefilled entries, not every feature on poster.sh.
Drag & drop an image here, or click to browse
Supports PNG, JPG, WEBP
Max file size: 20MB
How to compress an image
- 1
Upload an image
Choose a PNG, JPG, or WebP file from your device.
- 2
Adjust compression quality
Lower the quality setting to reduce file size more aggressively.
- 3
Download the smaller file
Compress the image and save the optimized version when the preview looks right.
Image Compression FAQ
Why does PNG export as WebP here?
WebP usually delivers smaller files than PNG while preserving strong visual quality, so this tool converts PNG to WebP for better compression.
Does this route upload the image?
No. The current compression flow runs in your browser and keeps the file on your device during processing.
What is the current file limit?
The current single-file limit on this public compressor is 20MB.
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