Image Compressor
Compress JPEG, PNG and WebP images in your browser. Adjust quality, resize and convert formats without uploading files.
How does image compression work?
This tool uses the Canvas API to re-encode your image at a specified quality level. Lower quality settings produce smaller files but may introduce visual artifacts. The entire process runs locally in your browser.
Is my data safe?
Yes, all processing happens locally in your browser. No images are uploaded to any server, so your files remain completely private.
What is the maximum file size?
The maximum file size per image is 50MB. For very large images, the tool will resize them to fit within browser memory limits.
What formats are supported?
You can output compressed images in JPEG, WebP or PNG format, or keep the original format. WebP usually offers the best compression ratio.
Does compression reduce image dimensions?
Only if you set a maximum width or height. By default the tool only adjusts compression quality without changing dimensions, while preserving the aspect ratio.
What is the difference between lossy and lossless compression?
Lossy compression (JPEG, WebP) reduces file size by removing some image data, which may affect quality. Lossless compression (PNG) preserves all image data but produces larger files.
Can I compress multiple images at once?
Yes, you can select and compress multiple images simultaneously. Each image is processed individually with your chosen settings.
Why is WebP recommended for compression?
WebP is a modern image format developed by Google that offers superior compression compared to JPEG and PNG. At equivalent quality it typically reduces file size by 25-35% more than JPEG.
Will compression affect image quality?
Compression at high quality settings (80-100%) produces minimal visible changes. Lower settings may introduce artifacts, but you can preview the result before downloading.
Can I resize images while compressing?
Yes, you can set maximum width or height limits. The tool will automatically scale down images that exceed these limits while maintaining the aspect ratio.
Is this tool free to use?
Yes, this tool is completely free with no limitations. There are no watermarks, no file size limits beyond the 50MB maximum, and no registration required.
Does this work on mobile devices?
Yes, the tool works on all modern browsers including mobile devices. The interface is responsive and adapts to different screen sizes.
How to Use Image Compressor
Compress JPEG, PNG, and WebP images right in your browser — adjust quality, resize dimensions, and convert formats without uploading anything. Your files stay on your device from start to finish.
- Add the images you want to shrink; each file's original size is shown before compression.
- Choose the output format from the options: keep Original to match each file's type, or force JPEG, WebP, or PNG.
- Enter a target width or height in the W and H boxes to resize; leave them empty to keep the current dimensions.
- Adjust the quality setting and watch the estimated output size change — lower quality yields smaller files.
- Compare the before/after sizes for each image, then download the compressed results to your device.
For photos, WebP usually achieves the smallest file at equal visual quality, while PNG is best reserved for screenshots and graphics with sharp edges.
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