Reduce Image File Size Online Free —
JPG, PNG & WebP
Reduce image file size online free — JPG, PNG and WebP reduced by up to 90% without visible quality loss. No signup, no limits, batch upload supported.
Reduce Image File Size — Free Online Tool
Upload your images, set compression level, download smaller files instantly. No account required.
Reduce File Size Free →How to Reduce Image File Size Without Losing Quality
The key to reducing image file size without visible quality loss is matching the compression level to your use case. A JPG photo at 50% compression typically reduces file size by 60–80% with no perceptible difference on screen. At 70% compression, the reduction reaches 80–90% with minimal visible artefacts at normal viewing sizes.
For PNG files the tool uses palette quantisation — reducing from 16 million possible colours to an optimised set of 256. This reduces PNG file size by 70–90% while keeping the image visually identical. Full alpha channel transparency is always preserved — same technique as TinyPNG, available here free with no monthly limit.
Target File Sizes for Common Use Cases
Website images: keep hero images under 200KB, product photos under 300KB, and thumbnails under 50KB for good Core Web Vitals scores. Email attachments: keep images under 100KB — large images cause loading issues on mobile. Visa and government forms: most portals require photos under 100KB — see our image compressor to 100KB.
Social media: most platforms recompress uploads — reduce to 60–70% before uploading to prevent double compression artefacts. Shopify and WooCommerce: keep product images under 500KB — your theme generates smaller versions automatically but the original is stored at full size.