Your files stay on your device

# Image delivery optimizer

Paste page HTML and audit its images for declared versus intrinsic size, lazy-loaded heroes, missing srcset, and format, with estimated byte savings per fix and a CSV download.

Paste page HTML and press Audit images.

The audit reads the HTML you paste and nothing else. Images inserted by JavaScript and backgrounds declared in external CSS stay invisible to it, and an image host without CORS headers still yields pixel dimensions from the image element but no byte count. Savings are published-baseline estimates, about 25 percent off JPEG and 26 percent off PNG for WebP, with oversized files scaled by pixel area; nothing is downloaded or re-encoded. Images you probe are fetched once from their own hosts and belong to their owners.
OptionsAudit images

## More web & auth tools

- [Open graph preview](/web/og-preview)
- [HTTP header parser](/web/headers)
- [HTTP status reference](/web/http-status)
[All web & auth tools](/web)

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Canonical HTML: https://nutter.tools/web/image-delivery-optimizer
Markdown version: https://nutter.tools/web/image-delivery-optimizer.md
Plain-text version: https://nutter.tools/web/image-delivery-optimizer.txt
Agent index: https://nutter.tools/llms.txt