Images
Compress images
Compare file sizes when re-encoding images with quality controls.
One image per job, up to 5 MiB, 8 megapixels and 4096 px per side; output up to 20 MiB. Static JPG, PNG and WebP only. Animations are not supported. EXIF orientation is applied; original EXIF metadata is not copied. The format must be supported by your browser. Images are neither uploaded nor saved; processing downloads software resources.
Ready to select an image
What this tool does
Re-encode an image and compare actual byte counts to report savings or growth.
How to use it
- Load an image and choose a supported output format.
- Adjust JPEG/WebP quality; PNG does not use this quality control.
- Process and compare original and output sizes before downloading.
Verifiable example
- Input
- Original file 1000 bytes; output 800 bytes.
- Expected result
- 200 bytes saved, or 20%. A larger output is reported as growth.
Limitations to review
- A smaller output is not guaranteed. An already optimized PNG may grow when re-exported.
- Lower JPEG/WebP quality is lossy, not lossless compression. Browser format support and image quotas apply.
Related tools
Browse all guides. Local processing: the page downloads HTTP resources but does not send files or input data to a server for these functions.