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Image Compressor

Upload an image

Drag and drop or click to upload

JPGPNGWebP100% Private

💡 Great for AI-generated images

Shrink Midjourney outputsCompress DALL·E imagesOptimize Stable Diffusion rendersReduce Flux image sizes

About the Image

Compress JPG, PNG, and WebP images in your browser - free and private, with photos never uploaded. Reduce image file sizes up to 80% for faster websites and lighter uploads, with batch processing and resizing built in.

Large images are the single biggest drag on page speed, and AI image generators routinely produce files several times larger than needed. Compressing images before uploading to your website, CMS, or app often cuts 60–80% of the file size with no visible quality loss.

Compress JPG, PNG, and WebP images in batches directly in your browser, with optional resizing and format conversion. Photos never leave your device — important for unreleased product shots and personal images.

Use cases and examples

Shrink AI-generated images that ship at multi-megabyte sizes before uploading them to a site or CMS.

Prepare photos for a portfolio within upload limits without visible quality loss.

Batch-optimize a folder of screenshots for documentation that loads quickly.

How to use

  1. Drop images or click to select files (batch supported).
  2. Choose the quality level and optional target width.
  3. Preview the compressed result and size savings.
  4. Download the optimized images individually or together.

Frequently Asked Questions

What image formats can I compress? ▾

JPG, PNG, and WebP. You can also convert between formats — for example turning a PNG screenshot into a much smaller WebP file.

Is there a file size or count limit? ▾

No hard limit — the tool uses your browser resources, so very large batches depend on your device memory. Files are processed one at a time and never uploaded.

Is this tool free to use? ▾

Yes! This tool is 100% free. No signup, no credit card, no limits. It's part of Formatho's privacy-first developer toolkit.

Is my data safe? Does this tool send data to a server? ▾

Absolutely. This tool runs entirely in your browser. Your data never leaves your device. Zero server-side processing, zero tracking.