Image Quality Optimizer
Reduce an image's file size by re-compressing it, either to a quality level or a target size.
Image Quality Optimizer
This tool runs entirely in your browser. Your files never leave your device.
How to use
- 1Drop an image onto the box or choose a file.
- 2Choose 'Quality' to set the level yourself, or 'Target file size' to aim for a specific size.
- 3Pick JPG or WebP output — these compress; PNG does not.
- 4Optionally turn on resizing and set a maximum dimension.
- 5Click 'Optimize', review the before/after figures, then download.
About this tool
The Image Quality Optimizer makes an image's file smaller by re-encoding it at a lower quality, and optionally scaling it down. You can work in two ways: set a quality level directly (with Balanced, Small and Tiny presets), or give a target file size in kilobytes and let the tool search for the quality that fits. It reports the before and after dimensions and file size, and how much was saved. This is a compression tool — it reduces quality and size. It does not add detail or resolution that isn't already in the image. All processing happens in your browser with the Canvas API; nothing is uploaded.
Benefits & use cases
- Meet a strict upload size limit exactly.
- Make website images load faster.
- Shrink photos for email without thinking about quality numbers.
- Keep a consistent workflow by always hitting the same target size.
Frequently asked questions
Does this improve or upscale my image?
No. It only compresses. It cannot add detail, sharpness or resolution that isn't in the original — that would need an enhancement model, which this tool does not use.
How does 'target file size' work?
The tool encodes the image a few times at different quality levels, narrowing in on the highest quality that stays within your target. If nothing fits, it returns the smallest it achieved.
Why is PNG not offered?
Canvas PNG output is lossless and barely changes in size. For real savings, convert photos to JPG or WebP.
Is anything uploaded?
No. All optimization is done in your browser with the Canvas API.