365tools

Image Compressor

Reduce image file size without changing dimensions. Batch supported.

Files processed in your browser — never uploaded

How Image Compressor Works

1

Upload your images

Drop one or more JPG or PNG images onto the upload area.

2

Set compression level

Drag the quality slider or pick a preset: Maximum, Balanced, or High Quality.

3

Preview savings & download

See before/after size comparison and percentage saved, then download.

Key Features

Significant Size Reduction

JPEGs can typically be reduced 30–70% with minimal visible quality loss at 70–80% quality.

Quality Control

Choose Maximum, Balanced, or High Quality presets, or set the slider from 1–100 for precise control.

Before/After Preview

See the original size, compressed size, and exact percentage saved for every image before downloading.

100% Private

Compression uses the browser's Canvas API. Your images never leave your device.

Batch & ZIP

Compress multiple images at once, then download individually or as a ZIP archive.

Instant Results

All compression happens locally in your browser — no server queues, no waiting.

Frequently Asked Questions

Q
How much can images be compressed?
A
Results vary by image content and quality setting. JPEGs can typically be reduced 30–70% with minimal visible difference at 70–80% quality. PNG compression is more limited since PNG is already lossless.
Q
Will compressing reduce visible quality?
A
At 75% quality or above, differences are very difficult to notice on screen. Use 'Balanced' (75%) for a good default, or 'High Quality' (90%) if quality is critical.
Q
What formats are supported?
A
JPG and PNG are supported. JPGs are compressed as JPEG, PNGs remain as PNG (lossless compression). For maximum PNG compression, consider converting to WebP using the Image Converter tool.
Q
Are my images uploaded to a server?
A
No. All compression uses the browser's Canvas API and runs entirely in your browser. Your files never leave your device.
Q
Can I compress multiple images at once?
A
Yes. Add multiple images and they are all compressed with the same quality setting. Download individually or as a ZIP.

Want to Convert or Resize Instead?

Image Converter

Convert between PNG, JPG, WebP, AVIF, GIF, and BMP with quality control.

Image Resizer

Resize images to exact pixel dimensions with aspect ratio lock and batch support.

Compress PDF

Reduce PDF file size in your browser. See exact savings before downloading.