Free Online Image Compression Tool

Compress JPG, PNG, and WebP images to your exact target size. Everything runs in your browser — no uploads, no registration, completely free.

Drop images here or click to select files

Supports PNG, JPG, WebP

80%

Higher quality = larger file. 70-85% is recommended for web use.

About Our Image Compression Tool

Our free online image compressor helps you reduce file sizes without sacrificing visual quality. Whether you're optimizing photos for your website, preparing images for social media, or simply trying to save storage space, our browser-based tool delivers professional results instantly.

Unlike server-based compressors that require you to upload your personal files to remote data centers, our tool performs all processing locally in your web browser. This means your sensitive photos, confidential screenshots, and private documents never leave your device. You get the same professional-grade compression without any privacy risks.

How Online Image Compression Works

Image compression reduces the amount of data needed to represent an image. Our tool uses the browser's native Canvas API to adjust compression parameters locally on your device. For JPG images, we control the quality setting to balance file size against visual fidelity. For PNG files, we apply optimization techniques to remove unnecessary metadata and compress color data more efficiently.

When you choose target size mode, our tool iteratively adjusts the compression quality and, if necessary, scales down the image dimensions until your file falls within the specified size limit. This is especially useful when you need to meet strict upload requirements for government portals, job applications, or email attachments.

WebP format offers the best of both worlds — superior compression compared to JPG while supporting transparency like PNG. When you choose WebP as your output format, you can typically achieve 25-35% smaller files than equivalent JPG images, making it the ideal choice for modern websites.

Two Compression Modes

Quality-based compression lets you set a quality percentage (10-100%). This is the most common approach and works well when you want predictable visual results. At 80% quality, most photographs remain visually indistinguishable from the original while achieving significant file size reductions.

Target size compression lets you specify an exact file size (e.g., 100KB, 500KB, 2MB). The tool automatically finds the optimal balance of quality and dimensions to hit your target. This mode is perfect when platforms enforce strict file size limits.

Supported Formats and Use Cases

Our compression tool supports PNG, JPG, and WebP input formats. You can maintain the original format or convert between formats during compression. This is particularly useful when you have PNG screenshots that would be better served as compressed JPG files, or when you want to modernize your image assets by converting to WebP.

Common use cases include:

  • Website optimization: Reduce image file sizes to improve page load speed and Core Web Vitals scores.
  • Social media: Compress images to meet platform size limits while maintaining visual appeal.
  • Email attachments: Shrink photos so they fit within email provider attachment limits.
  • E-commerce: Optimize product photos for faster loading and better conversion rates.
  • Form uploads: Meet strict file size requirements for government, job, and school applications.
  • Storage saving: Batch compress entire photo collections to free up disk space.

Batch Processing

Our tool supports compressing multiple images at once. Simply drag and drop a folder of images or select multiple files using Ctrl+Click (or Cmd+Click on Mac). Each image is processed with the same settings, and you can download all results individually or as a batch with the "Download All" button.

Privacy and Security

Unlike many online image tools, our compressor processes everything locally in your browser. Your images are never uploaded to remote servers, ensuring complete privacy. This makes our tool safe for processing sensitive images, confidential documents, or personal photographs. We do not track your files, store your data, or have any access to the images you process.

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Frequently Asked Questions

What is the best compression quality setting?

For most web use, 70-85% provides the best balance between quality and file size. For images with text or graphics, use 85-95%. For thumbnails or previews, 60-75% is usually sufficient.

How does target size compression work?

The tool starts at high quality and progressively reduces it until the file is under your target size. If quality alone isn't enough, it may also slightly scale down dimensions.

Does compression affect image dimensions?

In quality mode, no — only the file size and quality are affected. In target size mode, dimensions may be reduced if quality alone cannot reach the target.

Can I compress multiple images at once?

Yes, select multiple files or drag and drop a batch of images into the upload area. All images will be processed with the same settings.

Is there a file size limit?

We recommend images under 10MB for best performance, though larger files will still process. The tool works entirely in your browser, so performance depends on your device.

Will my images be stored on your server?

No, all processing happens in your browser using client-side JavaScript. Your images never leave your device.

Can I convert formats while compressing?

Yes, you can select a different output format in the options panel before processing. For example, you can convert a PNG to a compressed JPG in one step.

What is WebP and why should I use it?

WebP is a modern image format developed by Google that offers superior compression. WebP files are typically 25-35% smaller than JPG and PNG at the same visual quality, making them ideal for websites.

Why is my compressed PNG still large?

PNG uses lossless compression, which preserves every pixel. If your PNG has many colors or photographic content, converting to JPG or WebP will produce much smaller files.

Can I use this tool for commercial purposes?

Yes, our tool is completely free for both personal and commercial use. There are no usage limits or licensing restrictions.