Page load speed is one of the most direct levers you have over user experience and search engine rankings. Images account for more than 60% of the average web page weight. Compressing them is the single highest-impact optimization most websites can make.

Google Core Web Vitals, specifically Largest Contentful Paint, are directly affected by how quickly your heaviest image loads. A 500 KB hero image that could be 80 KB after proper compression is costing you ranking and user retention every day it remains unoptimized.

Beyond web performance, compressed images reduce storage costs, speed up email delivery, and make sharing faster on mobile connections. Secure compression means your work stays completely private.

For JPEG compression, quality settings between 75 and 85 produce files that are visually indistinguishable from the original at 40-60% smaller file sizes. Test at 80 first before going lower.

How it works

How to compress images

Each compression tool is optimized for its specific format. Pick the tool that matches your file type.

Choose the right tool

Select the compressor matching your file format: JPEG, PNG, WebP, GIF, or SVG. Each uses format-specific algorithms for the best results.

Upload and configure

Drop your image onto the tool. Adjust quality, maximum dimensions, or target file size if available. A live preview shows the result before you download.

Download your compressed file

Click Download to save the compressed image. The file size reduction is shown alongside the preview so you can compare.

Best practices

Tips for maximum compression

1Start at quality 80 for JPEG

Quality 80 reduces file size by 40-60% compared to quality 100, with no visible difference to most viewers. Only go lower if you need a smaller target size.

2Resize before compressing

Serving a 4000px wide image on a 400px wide mobile screen wastes bandwidth even after compression. Resize to your display dimensions first.

3Use PNG only when needed

PNG is lossless and larger than JPEG. Only use it when you need transparency or perfectly sharp edges, like logos. Photos should almost always be JPEG or WebP.

4Minify SVG for web assets

SVG files exported from Illustrator or Figma often contain large amounts of invisible metadata and redundant paths. The SVG compressor removes this without affecting visual output.

5Re-compress WebP originals

If you receive WebP files at high quality, you can often compress them further without visible degradation. Target 80-85% quality for web delivery.

6Check file size, not just quality

Two images at the same quality setting can differ significantly in file size based on content complexity. Always verify the final KB count, not just the quality percentage.

FAQ

Frequently asked questions

Does image compression reduce visible quality?

At moderate quality settings (75-85 for JPEG), compression is visually lossless for most viewers. The algorithm removes data the human eye cannot detect. At very low quality settings, artifacts become visible as blockiness or color banding.

What is the maximum compression ratio I can achieve?

JPEG photos can typically be reduced by 60-80% at quality 80 compared to uncompressed. PNG files with few colors can be compressed by 70-90%. SVG files with export metadata can sometimes be reduced by 50-80%.

Are my files private and secure?

Yes. All compression runs locally on your device. Your images are processed securely and stay private throughout.

Can I compress images for email attachments?

Yes. JPEG compression is ideal for reducing photo attachments. For a target email attachment, use the Photo Resizer first to set dimensions, then compress the JPEG to your target size.

What is the difference between JPEG and PNG compression?

JPEG uses lossy compression that permanently removes some image data to achieve small file sizes. PNG uses lossless compression that reduces file size without removing any data. Lossless PNG is always larger than a comparable JPEG but preserves every pixel exactly.

Start using compress tools free

Truly secure. Always free.

Browse Compress tools