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Image Compressor

Reduce image file sizes locally in your browser using the HTML5 Canvas API. Drop multiple images, adjust the quality slider (10% to 100%), compare original and output byte sizes side by side, and download optimized files individually or all at once.

#image#compress#optimize#jpg#png#webp

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How to Use Image Compressor

1Drag and drop your image files into the upload zone, or click to select one or more images from your device.
2Adjust the quality slider (from 10% to 100%, default 80%) to re-encode the images in real time.
3Review the original file size, new file size, and percentage change on each card.
4Click the download button on individual images or click 'Download All' to trigger downloads for every processed file.

Frequently Asked Questions

Are my images uploaded to a server during compression?

No. Image decoding and canvas re-encoding run locally in your browser using HTML5 Canvas (canvas.toBlob) and client-side JavaScript. Your files are not uploaded to RapidKit's servers.

How does this tool handle PNG versus JPEG and other image formats?

In the current canvas encoder, PNG uploads are re-encoded as image/png, while JPEG and other non-PNG image inputs are re-encoded as lossy image/jpeg using your selected quality percentage (10%–100%). Because standard browser PNG encoding is lossless, adjusting the quality slider primarily affects JPEG outputs — for smaller transparent graphics, use our WebP Converter.

Is there a file count limit or server queue?

Because processing runs in your browser tab rather than on a remote server queue, there is no server-side file limit; performance depends only on your device's available memory.

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