Know your formats
Supported formats and limitations
Accepted formats are checked from file contents. Native browser codec support is required. Only still images are supported.
- Input formats
- JPGPNGWEBP
- Output formats
- JPGWEBP
- Quality values are encoder-specific and cannot be compared directly across formats. PNG is not offered as a quality-adjustable output.
- Raising quality cannot recover previously lost detail. Source metadata is discarded.
The slider changes encoding quality rather than image dimensions or focus. Use 95% for High quality, 85% for Balanced or 65% for Smaller file, then inspect the result and actual bytes. Re-encoding an existing lossy image can add artifacts. PNG has no lossy quality setting.
Limits: 16 MiB per file, 8192px per edge, 8 megapixels. Batch input is limited to 8 files / 32 MiB, and retained batch outputs to 64 MiB. Metadata is discarded; color profiles and HDR may change.
A local workflow
How to use this converter
Your file contents stay in the browser as you work.
Choose an image and an available lossy output format.
Set an encoding quality value.
Compare the preview and size before downloading.
A little more clarity
Frequently asked questions
Can this improve a blurry photograph?
No. Encoder quality changes compression, not the detail or focus present in the source.
Is Image Quality Adjust available now?
This tool runs locally with JavaScript enabled. Check its supported formats and size limits before converting.