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Image Compressor

Compress JPEG, PNG, and WebP images. No upload — all in-browser.

Drop an image here or click to upload

Compress images without losing quality

Large image files slow down websites, increase mobile data consumption, and hurt Core Web Vitals scores. This free image compressor reduces JPEG, PNG, and WebP file sizes directly in your browser — no server upload, no account, and no waiting for a cloud queue. The quality slider lets you choose exactly how much compression to apply and preview the result before downloading.

What quality setting should you use?

For most websites and blog posts, a quality level between 70 and 80 produces files that look identical to the original on a screen but are 60–80% smaller. E-commerce product photos work well at 80–85% to preserve fine detail. Social media uploads can tolerate 65–75% because platforms re-compress images anyway. Below 60% you will start to notice JPEG blocking artifacts on photos with smooth gradients or skies.

JPEG vs WebP — which should you choose?

WebP is Google's modern image format and typically achieves 25–35% smaller files than JPEG at equivalent visual quality. Every major browser — Chrome, Firefox, Safari, Edge — has supported WebP since 2022. For new web projects, converting your JPEG images to WebP during compression is a simple way to cut bandwidth without any visible quality loss. JPEG remains the better choice when you need maximum compatibility with older email clients or third-party platforms that do not yet accept WebP.

Why PNG files may not compress much

PNG uses lossless compression — every pixel is stored exactly. A quality-slider approach cannot meaningfully reduce PNG size without discarding pixel data. If you need smaller PNG files, convert them to WebP (lossy) or use a dedicated lossless PNG optimiser like pngquant, which reduces palette depth. Photos stored as PNG should almost always be converted to JPEG or WebP for web use — they will be 70–90% smaller with no visible difference.

Privacy — your files never leave your device

Every compression operation runs entirely in your browser using the HTML5 Canvas API. Your images are not uploaded to any server, not logged, and not retained after you close the tab. This makes the tool safe for compressing confidential documents, medical images, ID photos, or any image containing private information.

Frequently asked questions

What quality setting should I use?
For general web use, 70–80% quality gives the best balance of file size and visual quality — most users cannot see the difference from the original at 75%. For social media uploads, use 80–85% to ensure photos look sharp on high-density screens. For archiving or print purposes, use 90–95% to minimise quality loss. Avoid going below 60% as visible blocking artifacts become noticeable on photos with smooth gradients.
What is the difference between JPEG and WebP?
WebP is a modern image format developed by Google that typically produces files 25–35% smaller than JPEG at equivalent visual quality. WebP also supports transparency (like PNG) and animation (like GIF). All modern browsers — Chrome, Firefox, Safari, Edge — support WebP fully. Use WebP for web projects to reduce page load times. Use JPEG when maximum compatibility is needed, such as for email attachments or systems that may not support WebP.
Why is my PNG file larger after compression?
PNG is a lossless format, and this tool cannot reduce PNG file size significantly without converting it to a lossy format. The quality slider has minimal effect on PNG output size. To achieve major size reductions, convert PNG to WebP or JPEG — this typically reduces file size by 50–80%. For true lossless PNG compression without format conversion, use a dedicated tool like pngquant or optipng.

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