Image Tools
Image Compressor
Reduce file size for faster web loading.
Enter the values and review the result.
Drop your image here or click to browse
Max 10MB
Lower quality results in smaller file size.
Calculation assumptions
- *Images are read and compressed in your browser using canvas.
- *Compressed output is generated as JPEG in the current implementation.
- *Lower quality usually means smaller file size but more visible quality loss.
- *Very large files may be slow or fail depending on browser and device limits.
Upload your image and press Compress Image.
Compressed output will appear here.
How image compression works
This tool draws your image to a browser canvas and exports a compressed JPEG using the quality setting you choose.
Example: lowering quality from 90% to 70% can reduce file size, but fine details, gradients, or text may look softer.
Compression results vary by source format, dimensions, image detail, and browser support.
Common mistakes
- Expecting compression to preserve perfect quality.
- Compressing images with small text too aggressively.
- Assuming PNG transparency will be preserved when output is JPEG.
- Using very large images that may exceed browser memory limits.
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
File and image results can vary by file structure, browser support, size, fonts, compression, and format limits. Review downloaded files before using or sharing them, and avoid sensitive files unless you understand how the tool handles them.
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Select the desired compression quality.
Upload your image file (JPG, PNG, or WebP).
The tool will create a smaller JPEG output when browser compression succeeds.
Related Tools
Other helpful tools in the Image Tools category.
Image Resizer
Change image dimensions while keeping quality.
Image to Base64
Convert image files to Base64 strings.
Base64 to Image
Convert Base64 strings back to image files.
JPG to PDF
Convert images to a PDF document.
PDF to JPG
Convert PDF pages to image files.
Related Guides
Background reading and explanations related to Image Compressor.
Frequently Asked Questions
Common questions about Image Compressor and how to read the result.
Which format is best for web?
WebP can be efficient, but this tool currently exports compressed JPEG files. Choose the final format based on your site or app requirements.
Will compression reduce quality?
Usually yes. Lower quality settings can create smaller files but may add visible artifacts.
Does this preserve transparency?
No. The current output is JPEG, so transparent areas may not be preserved.
Are files processed in the browser?
Yes. This compressor uses FileReader and canvas in your browser for the compression operation.
Can very large images fail?
Yes. Large images may be slow or fail depending on browser and device memory.
Does this remove metadata?
Do not rely on this tool for metadata removal. Review the downloaded file if metadata matters.