Size limit helper
Image Compressor
Compress images toward a target KB or MB size while keeping quality as high as possible.
Browser processing · no file upload to our server
Drag images here or click to upload
JPG, PNG, WebP, HEIC · up to 10 files · 20MB each · paste supported
Processed in your browser · no server upload
Upload at least 1 image to run this tool.
How to use Image Compressor
Set a size target such as 500KB or 1MB and let the browser adjust quality and format. If the target cannot be reached safely, the result status explains it.
Recommended workflow
- 1.Upload images.
- 2.Choose target size and format.
- 3.Start compression.
- 4.Download the smaller files.
Image Compressor output checks
- Check the output KB or MB against the upload limit.
- Verify pixel dimensions and whether transparency is preserved.
- Open at 100% size to check text and edge sharpness.
Processing method
The tool adjusts output format and quality toward the target size. Source dimensions and image detail can make an exact KB target impossible.
How files and inputs are handled
This tool processes files and inputs in the current browser. OneClickTool does not receive or store the original content on its own server.
Frequently Asked Questions
Can the target file size always be reached?
Not always. Some images cannot hit a very small target without visible damage, and the result status explains that.
Should I choose 500KB or 1MB?
Use the upload limit when you have one. Otherwise choose the smallest result that still looks acceptable.
Does compression change image dimensions?
Compression mainly changes quality and format. Use Image Resizer if you also need smaller pixel dimensions.
Supported Scope
Upload JPG, PNG, WebP, or HEIC images and compress them toward a target file size. Check the output size and reduction rate before downloading.
The exact KB target may not always be reachable because it depends on image content and resolution.
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