Image Compressor

Shrink images without losing quality — processed in your browser, never uploaded

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About this image compressor

This free image compressor reduces the file size of JPG, PNG, and WebP images directly in your browser using the HTML5 Canvas API. Your images are never uploaded to any server — the compression happens entirely on your device, making this one of the most privacy-friendly image compression tools available.

Compressed images are output as JPEG files, which gives the best size-to-quality ratio for photographs and complex images. The quality slider lets you balance file size against visual quality from 10 percent (maximum compression) to 100 percent (no compression).

What quality setting should I use?

90 to 100% — Print quality: Minimal compression. Use for images that will be printed or displayed on large screens where fine detail matters.
70 to 85% — Web standard: The sweet spot for most website images. Typically reduces file size by 40 to 70 percent with no visible quality loss on screen.
50 to 70% — Thumbnails and previews: Good for small images, thumbnails, and background images where fine detail is less important.
10 to 50% — Maximum compression: Noticeable quality loss. Use only when file size is the absolute priority and image quality is secondary.

Why image compression matters

Image file size is one of the biggest factors affecting web page load speed. A page with uncompressed images can take 3 to 5 times longer to load than the same page with properly compressed images. Google uses page speed as a ranking signal, so compressing images directly improves your SEO performance.

Pages that load in under 2 seconds have significantly lower bounce rates than slower pages.
Mobile users on cellular connections benefit most from compressed images.
Email attachments and file uploads often have size limits that compression helps you stay under.
Compressed images use less storage space on your device and in cloud services.

Frequently asked questions

Will compressing my image reduce its dimensions?

No. This tool only reduces file size through quality compression, not by resizing. Your compressed image will have exactly the same pixel dimensions as the original. To resize an image, you would need a separate resizing tool.

My PNG file got larger after compression — why?

This can happen with PNG files that use transparency or that are already heavily optimized. This tool converts all images to JPEG format, which does not support transparency. If your PNG has a transparent background, the transparency will be replaced with white. For images with transparency, keep the original PNG format.

Is 80% quality good enough for a website?

Yes. 80% is the industry standard for web images. At this setting, the quality difference between the original and compressed version is imperceptible to most viewers on screen, while file size typically drops by 50 to 65 percent.

Can I compress multiple images at once?

Currently this tool processes one image at a time. After downloading your compressed image, click "New image" to compress another. Batch compression is on the roadmap for a future update.

Image Compressor

Compression results

About this image compressor

What quality setting should I use?

Why image compression matters

Frequently asked questions