TOOLADEX

Image Compressor

Compress images to reduce file size while maintaining quality. Perfect for optimizing images for web, email, or storage.

Supported formats: JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, TGA, PSD, EPS, SVG, and more. Recommended: up to 20MB per image. Maximum: ~50MB.

Table of Contents

What is Image Compression?

Image compression is the process of reducing the file size of an image while maintaining an acceptable level of visual quality. This is achieved by removing redundant or unnecessary data from the image file, making it smaller and faster to load, transfer, or store.

There are two main types of image compression: lossless and lossy. Lossless compression reduces file size without losing any image data, while lossy compression achieves greater file size reduction by removing some image data, which may result in a slight decrease in quality.

Our image compressor uses lossy compression, which is ideal for web use, social media, and email attachments where smaller file sizes are more important than perfect image quality. It supports a wide range of formats including JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, TGA, PSD, EPS, SVG, and more, automatically converting less common formats to optimized JPEG when needed.

How it Works

Our image compressor processes your images using advanced algorithms to reduce file size while preserving visual quality. Here's how it works:

  • Upload: Select an image file from your device (JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, TGA, PSD, EPS, SVG, and more)
  • Configure: Adjust quality settings and optionally set a maximum width for resizing
  • Compress: Our server processes the image using optimized compression algorithms
  • Download: Get your compressed image with reduced file size, ready to use

The compression happens entirely on our secure servers. Your original image is never stored, and the compressed version is only available for download during your session.

Compression Settings

Quality (10-100%)

The quality setting controls the balance between file size and image quality. Higher values preserve more detail but result in larger files, while lower values create smaller files but may introduce some visual artifacts.

  • 90-100%: Near-original quality, minimal compression
  • 70-85%: Good balance, recommended for most uses
  • 50-70%: Noticeable compression, smaller files
  • 10-50%: High compression, significant quality loss

Maximum Width

Setting a maximum width resizes your image while maintaining its aspect ratio. This is useful for:

  • Reducing file size by decreasing pixel dimensions
  • Optimizing images for specific display sizes
  • Creating thumbnails or smaller versions of images

If you leave this empty, the image will keep its original dimensions and only the quality compression will be applied.

Common Use Cases

  • Website Optimization: Reduce image file sizes to improve page load times and SEO rankings
  • Email Attachments: Compress images before sending to avoid email size limits
  • Social Media: Optimize images for faster uploads and better performance on platforms
  • Storage Savings: Reduce storage space needed for image collections
  • Mobile Optimization: Create smaller images for mobile apps and responsive websites
  • E-commerce: Optimize product images for faster loading on online stores
  • Blog Posts: Compress images for blog articles to improve reader experience
  • Portfolio Websites: Balance image quality with fast loading times for image galleries

Best Practices

Choose the Right Quality

For web use, 70-85% quality is usually the sweet spot. It provides good visual quality while significantly reducing file size. For print or archival purposes, use 90-100%. For thumbnails or previews, 50-70% may be sufficient.

Resize Before Compressing

If your image is larger than needed, set a maximum width to resize it first. This often results in better compression ratios than compressing a large image at high quality.

Test Different Settings

Different images compress differently. Photos with lots of detail may need higher quality settings, while simple graphics can often be compressed more aggressively. Experiment to find the best balance for your specific image.

Keep Originals

Always keep a copy of your original uncompressed images. Once an image is compressed with lossy compression, you cannot restore the original quality. Save compressed versions with different names.

Consider File Format

Our compressor supports many formats including JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, TGA, PSD, EPS, SVG, and more.

  • JPEG is best for photos and will be output as compressed JPEG
  • PNG for graphics with transparency, output as PNG (or JPEG if PNG is larger)
  • WebP for modern web use, maintains WebP format
  • Other formats (BMP, TIFF, PSD, etc.) are converted to JPEG for compression
  • SVG files are first converted to raster format before compression

The compressor intelligently maintains the original format when possible while optimizing file size.

Frequently Asked Questions

What image formats are supported?

We support a wide range of formats that Pillow can read, including:

  • Input formats: JPEG, JPG, PNG, WebP, GIF, BMP, TIFF, TIF, ICO, TGA, PSD (Adobe Photoshop), EPS, SVG, ODD (OpenDocument Drawing)
  • Output behavior:
  • JPEG/JPG → Compressed JPEG
  • PNG → Compressed PNG (or JPEG if PNG is larger)
  • WebP → Compressed WebP
  • Other formats → Converted to JPEG for compression
  • SVG files are converted to raster format first

For best compression results, JPEG is recommended for photographs.

What's the maximum file size?

Recommended: Up to 10-20MB per image for best performance and reliability.

Maximum: Approximately 50MB per image. However, very large images may timeout or run out of memory, especially on free tier hosting.

Limitations: The actual limit depends on several factors:

  • FastAPI default upload limit: ~100MB
  • Server memory (free tier): ~512MB RAM
  • Pillow image processing memory usage
  • Image dimensions (very high resolution images consume more memory)

If your image is larger than 20MB, consider resizing it first or using image editing software to reduce the dimensions before compressing.

Will compression reduce image quality?

Yes, lossy compression does reduce image quality to achieve smaller file sizes. However, with quality settings of 70-85%, the quality loss is usually imperceptible to most viewers while still achieving significant file size reduction. You can adjust the quality slider to find the perfect balance for your needs.

Is my image stored on your servers?

No. Your images are processed temporarily on our servers and then immediately deleted. We don't store, save, or share your images. The compressed image is only available for download during your session.

What quality setting should I use?

For most web use, 70-85% is recommended. This provides a good balance between file size and quality. For high-quality prints or professional use, use 90-100%. For thumbnails or previews where file size is critical, 50-70% may work well.

Should I resize the image before compressing?

If your image is larger than needed for its intended use, yes! Resizing to the maximum width you need before compressing will result in better file size reduction. For example, if you only need a 1200px wide image for a website, set the maximum width to 1200px rather than compressing a 4000px wide image.

Can I compress multiple images?

Currently, you can compress one image at a time. Simply upload, compress, and download each image individually. This ensures each image gets optimal compression settings.

Will the compressed image look different?

With quality settings above 70%, the visual difference is usually minimal or imperceptible. At lower quality settings, you may notice some compression artifacts, especially in areas with fine details or gradients. Always preview the compressed image before using it for important purposes.