Online Image Compressor - JPG/PNG/WebP Lossless Compression - Tooleazy
Reduce image size by adjusting quality
About Image Compression
Lower the quality percentage to get a smaller file. Below 100% quality, PNG/GIF are re-encoded as JPEG. Processing happens locally in your browser and files are never uploaded to a server. To convert a format, use the image format converter; after compressing small icons you can also generate a data URI via image to Base64.
Image Compression Use Cases
Web performance: compressing product images and banners dramatically cuts load time; Email attachments: oversized attachments are often blocked by providers, compression gets them through; Social media: platforms impose size limits on uploads, compression keeps you under them; E-commerce: batch-compress product images to optimize site load and storage costs.
FAQ
Will compression reduce image quality?
Lowering quality moderately (e.g. 75%) greatly reduces size with no visible difference to the naked eye. PNG cannot be compressed further at 100% quality — lower the quality or convert PNG to JPEG/WebP for a smaller file.
Are my images uploaded to a server?
No. All compression runs locally in your browser; your images never leave your device, keeping your data safe.
Which image formats can be compressed?
JPG, PNG, WebP, GIF and other browser-renderable formats are supported. Below 100% quality, PNG/GIF are automatically re-encoded as JPEG; you can also convert to WebP via the format converter for an even smaller file.
What is the relationship between quality and file size?
Lower quality means a smaller file but more visible artifacts. Photos usually compress well at 60-80%, icons at 80-100% — adjust after previewing to suit your needs.
How do I compress an image below 100KB?
Upload the image and drag the quality slider down, or convert PNG/GIF to JPEG/WebP, then preview until the size fits. Photos typically shrink noticeably at 60-80%.
An image for WeChat is too large — how do I compress it?
Upload it here, then lower the quality or convert to WebP/JPG. A smaller file is easier to send over WeChat, email and other channels, with negligible visible quality loss.
Which compresses more, JPG or PNG?
JPG uses lossy compression and is usually far smaller than PNG; PNG suits lines, text and transparent backgrounds. If you only need to reduce size, convert PNG to JPG or WebP for a more obvious result.