Image Compressor

Compress JPG, PNG and WebP images in your browser. Adjust the quality slider, preview the result, and download — nothing is uploaded to a server.

Drop an image here or click to upload

JPG, JPEG, PNG or WebP

Max file size 25MB. Your image never leaves this browser.

Original—
Original uploaded image preview
Compressed—
Compressed image preview
0%
Size reduction

How to Use the Image Compressor

  1. Click the upload area, or drag and drop a JPG, PNG or WebP file onto it.
  2. Napizo automatically compresses the image using the default quality setting.
  3. Drag the quality slider and click "Re-compress" to fine-tune the balance between file size and image quality.
  4. Compare the original and compressed file sizes shown above each preview.
  5. Click "Download compressed image" to save the result to your device.

Benefits

  • Reduce image file size for faster-loading websites and smaller email attachments.
  • Compress images without installing any software.
  • Keep full control over the quality-to-size tradeoff with a live slider.
  • Works entirely in your browser, so your original file stays private.

Features

  • Drag-and-drop upload with a mobile-friendly file picker.
  • Adjustable compression quality for JPG and WebP files.
  • Side-by-side original vs. compressed preview.
  • Exact before/after file size and percentage reduction.
  • One-click download and reset.

Supported Formats

JPG, JPEG, PNG and WebP. PNG compression is lossless by nature — the tool re-encodes the file, but a quality slider does not apply the way it does for JPG or WebP.

Privacy & Security

This tool compresses images using your browser's built-in Canvas API. Your image is never uploaded to a Napizo server — all processing happens on your own device. Read the full Privacy Policy for details.

Frequently Asked Questions

Some quality loss is normal for JPG and WebP compression, but at higher quality settings (70–90%) the difference is usually hard to notice while the file size still drops significantly.

PNG is a lossless format. For photographic images, converting to JPG typically produces a much smaller file than re-encoding as PNG.

Yes, uploads are limited to 25MB, which comfortably covers the vast majority of photos and graphics.

Yes — compress as many images as you want, with no sign-up and no watermarks.

No. Compression happens locally in your browser using the Canvas API — your files never leave your device.

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