Image Compression Comparison
Encode the same photo at several JPEG qualities and compare sizes.
Image Compression Comparison is its own job in the catalog (compress): Encode the same photo at several JPEG qualities and compare sizes. It is not a copy of the resizer or converter with a new title — the operation is “cmp-quality”.
Controls on this page: preview and download. Output defaults to the format shown.
Processed in your browser. Files are not uploaded.
Supported: JPG, JPEG, PNG, WEBP, GIF, BMP, HEIC, AVIF. Max 25 MB, 1 file.
Related tools
Image Compressor
Shrink JPG, PNG and WebP with a quality slider. Compare before and after.
Resize Image to Specific KB
Aim for a file size such as 50 KB or 200 KB. We explain if the target is impossible.
JPG Compressor
Compress JPEG photos with a quality control.
PNG Compressor
Re-encode PNG or convert to WebP/JPEG for smaller files. Lossless PNG minification is limited in the browser.
WebP Compressor
Re-encode WebP at a chosen quality.
Compress Image to 50KB
Aim for about 50 KB. We warn if the photo cannot get that small without looking damaged.
Image Compression Comparison runs in this browser with Canvas. The file is not uploaded to imagecropx. Close the tab and the copy in memory is gone.
What this is not
There is no account and no file locker. If a format cannot be written, the tool says so.
How to use Image Compression Comparison
- Choose a file for Image Compression Comparison. It stays on this device.
- Check the preview. Nothing is sent to a server for this step.
- Process, then download. Image Compression Comparison works on one file at a time so the preview stays usable.
Questions about this tool
Does Image Compression Comparison upload my file?
No. Processing is in this browser.
Can I use this on a phone?
Yes, with the same file-size cap (about 25 MB). A large photo is slower on a phone CPU than on a laptop.
Does Image Compression Comparison upload the file?
No. This tool runs in the tab. See Privacy for decoder notes (HEIC, PDF.js worker).
What is the file size cap?
About 25 MB per file. Very large pixel counts are rejected so the tab stays responsive.