How to Batch Compress Images Online Free

Batch compress multiple images simultaneously online — save hours compressing photos one by one.

When you have dozens or hundreds of images to compress — for a website, e-commerce store, or photo gallery — compressing them one by one wastes hours. Batch compression lets you process all images simultaneously with the same settings in minutes.

When You Need Batch Compression

  • Uploading a large product catalogue to an e-commerce store
  • Optimising all images on an existing website
  • Preparing a photo album for a gallery or portfolio
  • Compressing photos for a blog with many images
  • Sending a large collection of photos via email or file sharing

How to Batch Compress at imgresizr.com

Visit imgresizr.com and upload multiple images at once — drag and drop all files into the compress tool. Set your quality target (85% for web photos is a good starting point). Apply the compression and download all files in a single ZIP archive. Every image is compressed with the same settings simultaneously, saving hours of manual work.

Batch Compression Settings Guide

Use CaseQualityFormat
E-commerce product photos85%JPG
Blog inline images80%JPG
Screenshot collectionsLosslessPNG
Social media assets85%JPG

Tips for Effective Batch Compression

  • Sort images by type before batching — photos and screenshots need different settings
  • Set a consistent output size for galleries — same dimensions create a professional, uniform look
  • Name files logically before compressing — batch tools often preserve file names
  • Always keep original full-resolution copies before batch compressing
  • Test one image first to verify the quality setting is right before running the full batch

Batch compress all your images for free at imgresizr.com — process dozens of files simultaneously with no software download required.