Image Compressor

Does this image compressor upload my pictures to any server?

No. All compression happens directly inside your browser using the Canvas API.

Can I compress multiple images at once?

Currently the tool processes one image at a time. After downloading, click 'Compress another' to process the next image.

How does quality affect the final image?

Lower quality reduces file size but may reduce clarity. PNG ignores the quality slider.

What happens if I set only width or only height?

The tool maintains aspect ratio automatically unless you disable it.

Why can PNG outputs be larger than JPEG?

PNG is lossless and typically produces larger files.

Is EXIF metadata removed during compression?

Yes. When the image is re-encoded through the Canvas API, EXIF metadata is stripped. Note: if the compressed output is unexpectedly larger than the original, the original file is returned unchanged and its EXIF may be retained.

What is the Target Size (KB) mode?

Target Size mode automatically finds the best quality and dimensions to hit your desired file size. It uses a smart binary search algorithm — no manual tweaking needed.

Why does the tool sometimes return the original file?

If the compressed version is larger than the original (common with already-optimized images or PNGs), the tool returns the original file to avoid making things worse. The result panel will show 'Already optimal'.