Free Online Image Compressor

Reduce image file size by adjusting quality. Works entirely in your browser — no uploads, no waiting.

Compressed preview

How to Compress an Image

Select any JPEG, PNG, or WebP image from your device. Use the quality slider to set the desired compression level — lower values produce smaller files. Click Compress, review the before and after file sizes, and download your optimized image instantly. Everything runs in your browser; your image is never uploaded to a server.

Why Compress Images?

Large images slow down websites, eat up storage, and exceed email attachment limits. Compressing images reduces file size while keeping visual quality acceptable. For web use, a quality setting between 60 and 80 percent usually strikes the best balance between clarity and performance.

Supported Formats

This tool works with JPEG, PNG, and WebP files. JPEG and WebP support lossy compression with adjustable quality. PNG compression is lossless in browsers, so size reduction for PNGs may be minimal — consider converting to JPEG or WebP for greater savings.

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Frequently Asked Questions

Is my image uploaded to any server?
No. All compression happens locally in your browser using the Canvas API. Your image never leaves your device.
What quality setting should I use?
For web images, 60–80% offers a great balance between quality and file size. For print, keep it above 90%.
Can I compress PNG images?
You can load PNGs, but browser-based PNG encoding is lossless, so size reduction may be small. Convert to JPEG or WebP for better compression.
Why is the compressed file sometimes larger?
At very high quality settings (95–100%), metadata and encoding overhead can make the output larger than the original. Lower the quality slider to see savings.
What is the maximum file size I can compress?
There is no hard limit, but very large images (50 MB+) may be slow depending on your device's memory and processing power.