100% Free & Private

Compress Files Instantly

Reduce file sizes up to 80%. Works offline.

Compress Convert
All JPEG PNG WebP PDF

Drag & drop images here

or browse files

Supports JPEG, PNG, WebP, GIF (max 10 files, 50MB each)

100% Private

Files never uploaded

Lightning Fast

WebAssembly powered

Batch Process

Up to 10 files at once

100% Free

No limits or sign-up

How to Compress Images Online

Compressing images is simple with SmallBytes. Follow these easy steps to reduce your image file sizes:

  1. Upload your images - Drag and drop up to 10 images, or click to browse. You can also paste images from your clipboard.
  2. Choose your settings - Select a preset like "Email Attachment" or "Website Hero", or customize the quality slider and output format.
  3. Compress - Click the "Compress All" button and watch as your images are optimized in seconds.
  4. Download - Download individual files or get all compressed images in a single ZIP file.

Why Compress Images?

Large image files are one of the biggest causes of slow websites. Compressed images offer several benefits:

  • Faster page load times - Smaller images download quicker, improving user experience and reducing bounce rates.
  • Better SEO rankings - Google considers page speed as a ranking factor. Optimized images help your site rank higher.
  • Lower bandwidth costs - Reduce hosting costs and data usage for you and your visitors.
  • Easier sharing - Compressed images are easier to email, upload to social media, and share via messaging apps.

Supported Image Formats

SmallBytes supports all major image formats used on the web:

  • JPEG/JPG - The most common format for photographs. JPEG uses lossy compression, meaning some data is discarded to achieve smaller file sizes. Best for photos with many colors and gradients.
  • PNG - Ideal for graphics, logos, and images with transparency. PNG uses lossless compression by default, but SmallBytes can also apply lossy compression for even smaller files.
  • WebP - A modern image format developed by Google that provides superior compression. WebP images are typically 25-35% smaller than JPEG at equivalent quality.
  • GIF - Animated images are converted to the first frame when compressed. For animated content, consider using video formats instead.

Privacy & Security

Your privacy is our top priority. Unlike other image compression tools that upload your files to remote servers:

  • 100% client-side processing - All compression happens in your browser using WebAssembly technology.
  • No data collection - Your images are never uploaded, stored, or seen by anyone else.
  • No server uploads - Files are processed entirely in your browser, not on remote servers.
  • No accounts required - Start compressing immediately without signing up or providing any personal information.

Frequently Asked Questions

Is this image compressor free?

Yes, SmallBytes is 100% free with no limits on the number of images you can compress. There are no watermarks, no sign-ups, and no hidden fees.

Are my images uploaded to a server?

No. All compression happens directly in your browser using WebAssembly technology. Your images never leave your device, ensuring complete privacy and security.

What image formats are supported?

SmallBytes supports JPEG, PNG, WebP, GIF images and PDF documents. You can also convert between formats - for example, converting PNG to WebP for smaller file sizes.

How much can I reduce my image size?

Typical compression reduces file sizes by 50-80% depending on the image and quality settings. Photos usually compress better than graphics with sharp edges.

Will compression affect image quality?

You have full control over the quality vs. file size tradeoff. At 80% quality (our default), most images look visually identical to the original while being significantly smaller.

Can I compress multiple images at once?

Yes! You can upload up to 10 images at once and compress them all in a single batch. Use the 'Download All' button to get a ZIP file with all compressed images.