Faster website images
Reduce image payloads before publishing product photos, blog images or landing-page graphics so pages can load with less transferred data.
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Drop your image here
Compress JPG, PNG or WebP locally in your browser.
🔒 Your image is processed locally in this browser and is not uploaded to Zavilo.
About Compress Image
Compress Image is designed for faster uploads, websites, email attachments and storage savings. Choose a quality level and output format, then compare the original and compressed file sizes before downloading.
Common use cases
Email and form uploads
Create a smaller copy when an email service, support form or document portal has attachment limits.
Storage-friendly copies
Keep a smaller derivative for everyday sharing while retaining the original image separately when maximum source quality matters.
How it works
1
The browser decodes the selected image into pixels and prepares a new encoded output.
2
Your chosen quality level controls the tradeoff between visual fidelity and compression for lossy formats such as JPG and WebP.
3
Zavilo creates the compressed result locally so you can compare the new file size before downloading it.
Privacy & file handling
Compression happens on your device
Supported images are decoded and re-encoded online. The source image does not need to be uploaded to Zavilo for compression.
Limitations and important notes
- Compressing an already heavily compressed image may save little space and can introduce additional artifacts.
- PNG is lossless, so meaningful size reduction often requires changing format or dimensions rather than simply lowering a quality slider.
- Compression does not increase resolution or restore detail missing from the original.
Common compression choices
| Feature | Best for | Tradeoff |
|---|---|---|
| JPG | Photographs and broad compatibility | Lossy; no transparency |
| WebP | Modern web delivery and smaller photo/graphic files | Compatibility with very old software can be weaker |
| PNG | Lossless graphics and transparency | Often larger for photographs |
How to use Compress Image
- 1
Choose a JPG, PNG or WebP image.
- 2
Select JPG or WebP as the compressed output format.
- 3
Move the quality slider to control the size-versus-quality tradeoff.
- 4
Click Compress Image, compare file sizes and download the result.
Tips for better results
- Start around 75–85% quality and inspect the result.
- WebP often works well for website images.
- For very large images, resizing dimensions before compression can save more space.
Frequently asked questions
How much can an image be compressed?
It varies by source image, dimensions, format and quality setting. The tool shows the before and after sizes.
Does lower quality mean a smaller file?
Generally yes, although exact results depend on the image.
Which file formats can I use?
Check the file picker and tool description for the supported formats. Available formats can vary by tool.