100% Free  ·  No Signup  ·  No Upload

Compress Images Free — Reduce JPG/PNG Size

Reduce file size up to 90%. Works entirely in your browser. Your files never leave your device.

Open Image Compressor Free
No file uploadNo account needed100% privateWorks offlineAlways free
🖼️

Drop image here or click to browse

PNG, JPG, WebP

What is Image Compressor?

Image Compressor is a free browser-based tool that reduces the file size of JPG, PNG and WebP images by up to 90% while keeping the visual quality high enough for web and screen use. The entire compression process runs using the browser's built-in Canvas API — no image is ever uploaded to a server.

Image compression works by reducing the amount of data stored per pixel. For JPG and WebP files, a quality setting controls how aggressively data is discarded. At 80% quality — the recommended starting point — most photos lose 60–80% of their file size with no visible difference on screen. PNG files use lossless compression, so reducing size requires converting to JPG or WebP first.

Common use cases include compressing photos before uploading them to a website or social media, reducing email attachment sizes, optimizing product images for e-commerce pages, and shrinking screenshots for documentation. Smaller images load faster, improving Core Web Vitals scores and SEO rankings. A typical 4MB phone photo compresses to under 400KB at 80% quality.

⚡
Instant results
No server processing or wait
🔒
100% private
Files stay on your device
💰
Always free
No subscription or fees
📱
Mobile ready
Works on any device

How to use Image Compressor

  1. Upload your JPG, PNG or WebP image by clicking or dragging it into the tool
  2. Move the quality slider — 80% is the sweet spot for most images
  3. Click Compress and see the file size reduction live in real time
  4. Download your compressed image — typically 60–90% smaller

Why use OnlineToolsPlus?

Image tools on OnlineToolsPlus run entirely in your browser using the Canvas API — no file ever touches a server. This matters for privacy: your photos, screenshots and graphics stay on your device. With 15+ free image tools covering compression, conversion, cropping, OCR, watermarking and more, you can handle any image task without installing software or creating an account.

Frequently asked questions

What quality setting should I use?
80% is the standard starting point for most uses. It gives a 60-80% file size reduction with no visible quality difference on screen. Go to 85-90% for photography portfolios, down to 70% for thumbnails and supporting images.
Does compression permanently damage the image?
For lossy formats like JPG and WebP, yes, some data is permanently removed. Always keep the original. The compressed version is for sharing or uploading. Never compress the original repeatedly.
What is the difference between JPG and WebP compression?
WebP produces files about 30% smaller than JPG at equivalent visual quality. Use WebP for websites. Use JPG for maximum compatibility with older systems and software.
Why is my PNG not compressing much?
PNG uses lossless compression, so the tool cannot discard data. PNG compression reorganizes data rather than removing it. For large file size reductions, convert PNG photos to JPG or WebP first.
Can I compress multiple images at once?
The current tool processes one image at a time. Upload, compress, download, repeat.
How much can I realistically reduce a photo?
A 4MB phone photo typically compresses to 300-500KB at 80% quality. That is an 85-90% reduction. The exact amount depends on the image content, format, and quality setting.

More Image Tools

Image ResizerResize to exact pixel dimensionsImage ConverterPNG ↔ JPG ↔ WebP conversionCrop ImageCrop to custom dimensionsRotate & FlipRotate 90°/180° or flipAdd WatermarkAdd text watermark to image

Last updated: April 11, 2026

View all 200+ free tools →