Image Compressor
Compress JPG, PNG and WebP images in your browser, compare file sizes, set quality or dimensions, and download individual files or a ZIP.
What this tool solves
Batch-compress JPG, PNG and WebP, set quality, maximum dimensions or an approximate target size, compare results and download files or a ZIP.
Input: JPG, PNG or WebP images from your device.
Output: smaller image files in your chosen format, plus before/after size comparisons.
How to use it
- Choose JPG, PNG or WebP files. Check the receiving service’s format and pixel requirements before choosing an output format and maximum dimension.
- Optionally set a target size; this tool uses 1 KB = 1024 bytes. PNG ignores quality and is never silently changed to WebP to meet a target.
- Review each result’s format, dimensions, exact bytes and target status. If it is too large, reduce dimensions or choose JPG/WebP and retry, then check visual detail.
Common use cases
- Reduce photos before email or form uploads
- Prepare lighter website and ecommerce images
- Shrink screenshots or scanned images without sending them to a server
Privacy, accuracy and limits
Compression is lossy when quality is reduced. A target KB size is approximate because image detail and format affect the final size.
WebToolMint keeps this workflow local in the browser where the feature allows it. Network-dependent tools are labelled separately. Keep originals and independently verify results that affect legal, financial, medical or business decisions.
Frequently asked questions
Can I compress an image to an exact KB size?
You can aim for a target size, but the final file can vary. Image complexity, dimensions and encoder behavior make an exact byte target impractical in one pass.
Are my photos uploaded?
The compressor is designed to process supported images in the browser. Keep the original file and verify sensitive work before sharing.
Should I resize or compress first?
If the image is much larger than the display or upload requirement, reduce dimensions first. Then tune quality to reach a smaller file with less visible damage.
Related tools
Related guides
Worked example and limits
For an application photo or small icon, establish the required pixel dimensions before reducing file size. A decimal 100 KB limit is 100000 bytes; entering 100 KB in this tool means 102400 bytes. Leave headroom and inspect the downloaded byte count. Submit only after checking readability, format and dimensions. No compression setting can guarantee every image will meet the limit.