Are my images uploaded to a server?

No. All compression runs in your browser using the Canvas API. Your images never leave your device.

Which format compresses best?

WebP usually gives the smallest size at the same visual quality, followed by JPEG for photos. PNG is lossless and best for graphics with sharp edges or transparency.

Why did my PNG not get much smaller?

PNG is lossless, so savings are limited. For big reductions on photos, convert to JPEG or WebP with the quality slider.

All Tools›Image Tools›

Image Compressor

Free · No Server

Compress PNG, JPEG, and WebP images in your browser with a quality slider and before/after size comparison.

Image Compressor

Drag an image here or click to upload (PNG, JPEG, WebP)

100% in-browser — images never leave your device.

What is Image Compressor?

The Image Compressor reduces the file size of PNG, JPEG, and WebP images entirely in your browser. Drag in an image, adjust the quality slider, and instantly see the before/after size and a percentage saving. Because compression uses the Canvas API on your device, images are never uploaded to a server — making it fast and completely private.

How to Use

1
Upload an image
Drag and drop or click to select a PNG, JPEG, or WebP file.
2
Pick a format and quality
Choose JPEG, WebP, or lossless PNG and set the quality slider.
3
Compress
Click Compress to re-encode the image and see the new size and savings.
4
Download
Save the optimized image to your device.

Common Use Cases

Optimizing images for faster page loads
Reducing upload size for forms and email
Preparing images for social media
Cutting bandwidth on image-heavy sites

Key Features

PNG, JPEG, and WebP support
Quality slider with live result
Before/after size and % savings
100% in-browser — no upload
Convert format while compressing
No file-size limit

🔒

100% Private — No Server Required

All processing happens directly in your browser. No data is uploaded, stored, or transmitted to any server.

Frequently Asked Questions

Related Free Tools

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Explore more Image Tools tools →

Last reviewed on June 14, 2026 by the AiTechWorlds Tools Team. All processing runs locally in your browser.

AiTechWorlds

All Tools›Image Tools›

Image Compressor

Free · No Server

Compress PNG, JPEG, and WebP images in your browser with a quality slider and before/after size comparison.

Image Compressor

Drag an image here or click to upload (PNG, JPEG, WebP)

100% in-browser — images never leave your device.

What is Image Compressor?

How to Use

1
Upload an image
Drag and drop or click to select a PNG, JPEG, or WebP file.
2
Pick a format and quality
Choose JPEG, WebP, or lossless PNG and set the quality slider.
3
Compress
Click Compress to re-encode the image and see the new size and savings.
4
Download
Save the optimized image to your device.

Common Use Cases

Optimizing images for faster page loads
Reducing upload size for forms and email
Preparing images for social media
Cutting bandwidth on image-heavy sites

Key Features

PNG, JPEG, and WebP support
Quality slider with live result
Before/after size and % savings
100% in-browser — no upload
Convert format while compressing
No file-size limit

🔒

100% Private — No Server Required

All processing happens directly in your browser. No data is uploaded, stored, or transmitted to any server.

Frequently Asked Questions

Related Free Tools

QR Code Generator Base64 Image Encoder Color Palette Generator CSS Units Converter Gradient Generator

Explore more Image Tools tools →

Last reviewed on June 14, 2026 by the AiTechWorlds Tools Team. All processing runs locally in your browser.