Optimize Images for Google PageSpeed
Google PageSpeed Insights (Lighthouse) flags images that are larger than they are displayed, saved in older formats or encoded less efficiently than they could be. This tool deals with all three at once: it limits the longest side to 1920 px, converts to WebP and searches for the lowest quality that still matches your original by SSIM, a structural similarity score.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JPG, PNG, WebP, HEIC, AVIF, GIF, TIFF, SVG, RAW, PSD, JXL, BMP, ICO and more
How to use PageSpeed Optimizer
- 1
Drop your images, choose files, or paste from the clipboard.
- 2
Adjust the options.
- 3
Click Optimize. Files are processed on your device.
- 4
Download each result or everything as a ZIP.
Why use Aback Images for pagespeed optimizer
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
Instant results
Everything runs locally in a background thread, so there is no upload queue and no waiting on a server.
Batch friendly
Process many images at once and download them individually or as a ZIP.
Every format
Works with JPG, PNG, WebP, AVIF, HEIC, GIF, TIFF, SVG, RAW and more, identified by content rather than file name.
Related tools
Make images website-ready in one pass: WebP at quality 78, at most 1920 px on the long side, camera metadata removed.
Generate WebP/AVIF/JPG widths plus ready-to-paste picture, srcset and sizes markup.
Tiny blurred previews, BlurHash, dominant colour and CSS for fast-loading pages.
Finds the smallest file that still looks identical to your original, measured with SSIM instead of guessing a quality number.
Shrink JPG, PNG, WebP, AVIF and GIF files with MozJPEG, OxiPNG and modern codecs, with a live before/after preview.
Make JPEG photos smaller with MozJPEG, the encoder that beats standard JPEG by 10-15% at the same quality.
Cut PNG size by up to 80% with smart palette reduction and OxiPNG lossless optimisation, keeping transparency.
Re-encode WebP images smaller with libwebp's best settings, including animated WebP.
Frequently asked questions
Which PageSpeed warnings does this address?
The image ones: properly sizing images, serving them in a modern format such as WebP or AVIF, and encoding them efficiently. Recent Lighthouse versions group these under a single Improve image delivery insight. Layout shift and lazy loading depend on your HTML, not the files.
Why is my image still flagged?
PageSpeed compares the file with the size it is displayed at. If your theme shows an image at 600 px, a 1920 px file is still oversized: set a smaller longest side under More options, or serve several widths with srcset using the Responsive Images tool.
Should I use AVIF instead?
AVIF is usually smaller still and counts as a modern format. It encodes much more slowly, so switch Save as to AVIF for a handful of key images rather than a whole library.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.