Compress JPEG images online

Reduce JPG file size by up to 80% while keeping images sharp. Free, no signup, 100% private.

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Open JPEG Compressor →

Pre-configured for JPEG compression with optimal settings

Compress JPEG Online — Free, Fast & Private

JPEG is the most widely used image format on the web, powering everything from product photography to social media posts. However, high-resolution JPEG files from modern cameras can easily reach 5-15 MB each, slowing down websites and making sharing difficult.

MiniPx compresses your JPEG files directly in your browser using advanced Canvas API compression. Unlike cloud-based tools that upload your images to external servers, MiniPx processes everything locally on your device. Your photos never leave your computer or phone.

Our JPEG compressor uses lossy compression to intelligently reduce file size while preserving visual quality. At the "Smart" setting (quality 78%), most images see 40-60% file size reduction with no visible difference to the human eye. For web optimization, this means faster page loads, better Core Web Vitals scores, and lower bandwidth costs.

Whether you are optimizing product images for an online store, preparing photos for a blog post, or simply want to free up storage space on your phone, MiniPx makes JPEG compression fast, free, and completely private.

How it works

  1. Upload your JPEG: Click or drag your JPG/JPEG files into the upload area. You can add multiple files at once for batch compression.
  2. Choose compression level: Select Gentle (10-20% reduction), Smart (40-60% reduction, recommended), or Tiny (70-85% reduction) depending on your needs.
  3. Set format to JPEG: Make sure JPEG is selected as the output format. You can also convert to WebP for even smaller files.
  4. Click Compress: Hit the Compress button. Processing happens instantly in your browser — no waiting for uploads.
  5. Download your files: Save individual files or download all at once. Each compressed file is named with a .minipx suffix.

Frequently asked questions

How much can MiniPx reduce JPEG file size?
Typically 40-80% depending on the image content and compression level you choose. Photos with lots of detail compress less than simple graphics. The Smart preset offers the best balance of size reduction and quality.
Does compressing JPEG reduce image quality?
JPEG compression is lossy, meaning some data is removed. However, at the Smart setting (quality 78%), the quality loss is imperceptible to the human eye. You can always try different levels and compare.
Is my JPEG safe? Do you upload it anywhere?
MiniPx processes everything in your browser using JavaScript. Your images are never uploaded to any server. You can verify this by disconnecting from the internet — the tool still works.
Can I compress multiple JPEGs at once?
Yes. You can drag and drop multiple JPEG files and compress them all in one batch. There is no limit on the number of files.
What is the difference between JPEG and JPG?
There is no difference. JPG and JPEG are the same format. The shorter .jpg extension became common because older Windows systems only supported 3-character extensions.
Should I use JPEG or WebP for my website?
WebP typically produces 25-35% smaller files than JPEG at equivalent quality. If your website visitors use modern browsers (Chrome, Firefox, Edge, Safari), WebP is the better choice. MiniPx can convert your JPEGs to WebP in one click.

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