Compress Images for Websites
Make your site faster — WebP / AVIF output, 1920-px max-width, q80.
Your images stay on your device. Nothing is uploaded.
Page speed is dominated by image weight. Switching from JPEG to WebP typically cuts image bytes by 25–35%, and limiting max-width to the actual largest rendered size (rarely above 1920px) often saves another 50% on top. The defaults below apply both at once.
Drop a folder of images via the bulk compressor for batch processing, or do them one at a time below. All processing is local.
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Frequently asked questions
- How much can I shrink images for website images?
- Typical reductions are 60–85% with no visible quality loss using the defaults on this page. On most marketing pages, swapping JPEGs at default quality for WebP at q80 with a 1920-px max-width cuts total image weight by 60–80%.
- What format is best for website images?
- WebP is the safe modern default — supported across all current browsers, smaller than JPEG, and supports transparency. AVIF is even smaller but currently has slightly slower decode on older devices.
- Will compression break transparency or animation?
- Transparency is preserved when the output format supports it (PNG, WebP, AVIF). Animation is preserved for animated WebP. JPEG output flattens transparency to white.
- Can I compress dozens of images at once?
- Yes — use the bulk compressor. Drop a folder or multi-select files; the queue processes them in order with progress per file, and you can download all results as a ZIP.
- Do my images get uploaded anywhere?
- No. The tool runs entirely in your browser — important for client work, internal assets, and anything not yet published.
Optimise the rest of your websites assets.
Use the bulk compressor to process a folder in one go. Everything runs locally.
Start compressing