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Beginner8 min readUpdated June 2026Image Optimization

How to Batch Compress Images for a Website

Resize and compress dozens of images at once with a local bulk tool. Keep your media library fast and consistent.

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Use the tool this guide covers

Bulk Compress — Free, browser-based, no upload required

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Why Batch Compress?

Resizing images one by one wastes time and invites inconsistency. Batch compression applies the same quality settings across dozens or hundreds of files, keeping your site fast and uniform.

Before You Begin

  • Collect the images into a single folder.
  • Decide your target quality or file-size budget.
  • Keep the originals somewhere safe in case you need to re-export.

Step 1: Open Bulk Compress

Launch the Imgira Bulk Compress tool. It runs locally, so your photos never leave your computer.

Step 2: Add Multiple Files

Drag the whole folder or select many images at once. The tool lists each file with its original size so you can see progress.

Step 3: Choose Settings

Pick a quality level that balances sharpness and size. For most web photography, a setting between 70 and 85 looks great while cutting file weight dramatically.

Step 4: Process and Review

Start the batch. The tool compresses every image and shows the new size next to the old one. Review a few to confirm the quality is acceptable.

Step 5: Download

Export the compressed set as a zip or individually. If you also need uniform dimensions, run a resize pass afterward so every image matches your template.

Tips for a Lean Media Library

Compress photographs to WebP or AVIF when your platform supports them. Keep PNG only for graphics with text or transparency. A smaller media library means faster pages and happier visitors.

Ready to Try Bulk Compress?

Free, browser-based, and completely private. No uploads to any server — everything runs locally in your browser.

Open Bulk Compress
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