About this image compressor
Reduce image file sizes for websites, email attachments and everyday sharing. Choose an image, select an output format and adjust quality. Processing takes place locally in your browser using the Canvas API.
How to use this tool
- Choose a JPG, PNG or WebP image from your device.
- Select JPG, WebP or PNG output and adjust quality when supported.
- Preview the result and download the compressed image.
Frequently asked questions
Are my images uploaded?
Image processing is performed in your browser. ToolNest does not intentionally upload the selected image to its servers.
Why does PNG quality not change?
PNG is a lossless format, so the quality slider does not apply to PNG output.
Will every image become smaller?
Not always. Some images are already optimized, and converting formats can sometimes increase file size.