EasyPDFSign
Try Free

Compress Image Online Free

Reduce the file size of JPG, PNG, and WebP images directly in your browser without losing quality.

Loading tool...

Related Tools

🗜️

Compress PDF

Optimize & Secure

Reduce PDF file size for email and faster sharing. No signup.

🖼️

JPG to PDF

Convert

Convert your images (JPG, PNG) into a single PDF document.

📸

PDF to JPG

Convert

Extract images from PDF or convert each page to a JPG image.

How It Works

This tool runs entirely in your browser – no server uploads required. Simply drag and drop or select your images and click compress. The tool automatically analyzes each file's structure and selects optimal compression settings. Once processing is complete, you can save the results immediately or use our interactive comparison view to fine-tune quality with the slider. Each image in your queue can be customized individually before downloading.

How to Compress Images — Step by Step

Optimize and reduce file sizes in seconds with this simple process

01

Upload Files

Drag and drop your JPEG, PNG, WebP, or GIF images into the upload area or click "Choose Image Files".

02

Select Format & Quality

Choose your desired output format (JPEG, PNG, WebP, or keep original) and adjust the quality compression slider.

03

Compare Results

Compare the optimized image size and visual look side-by-side with the original in real-time.

04

Download Optimized File

Save your compressed files individually or package all successfully optimized images together as a ZIP file.

Format Optimization Guide

How compression algorithms process different file types

JPEG Compression

For JPEG files, the tool detects the original quality level from the file's quantization tables. The default target quality is 80, which provides an excellent balance between file size and visual quality for most images. You can use the quality slider to adjust this – higher values preserve more detail but result in larger files, while lower values create smaller files with more visible compression artifacts. For even smaller files, consider converting to WebP.

PNG Optimization

PNG images are converted to PNG8 format with up to 256 colors. This format is ideal for web graphics, icons, logos, screenshots, and illustrations where color count is limited. Transparency is fully preserved. The Colors slider lets you reduce the palette further for additional compression. If your PNG is a photograph or contains smooth gradients with many colors, PNG8 may not be suitable. In this case, convert your image to JPG or WebP for better results.

WebP Compression

WebP images are compressed using lossy compression similar to JPEG. WebP typically achieves 25% to 35% smaller file sizes than JPEG at equivalent visual quality. The quality slider works the same way as for JPEG – adjust it to find the right balance for your needs.

GIF Optimization

Animated GIFs are optimized by analyzing and reducing the color palette while preserving animation frames. The Colors slider controls the maximum palette size from 2 to 256 colors. Reducing colors can dramatically decrease file size, especially for animations with simple graphics. For even better compression, consider converting GIF to WebP animation.

Privacy & Security

All image processing happens entirely in your browser using WebAssembly technology. There are no uploads to any server, no data collection, and no privacy concerns. All metadata (EXIF, GPS, camera info) is automatically removed from compressed images to safeguard your details.

Free & Unlimited

No registration required, no daily limits, and no watermarks on your output. Compress as many images as you need, completely free. The tool is designed for both casual users and professionals who need reliable, high-quality compression.

From the Blog

View all guides