Compress & resize images in bulk
Convert to WebP, AVIF, JPEG or PNG, shrink dimensions, rename and download — all for free, with nothing ever leaving your device.
No upload · No sign-up · No subscription
Image Optimizer
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Support types: jpgjpegpngwebpavif
Everything you need to ship lighter images
A focused toolkit for turning heavy photos into fast, web-ready assets.
Bulk compression
Drop in dozens of images and convert them to WebP, AVIF, JPEG or PNG in one pass, with adjustable quality.
100% private
Everything runs in your browser. Your images never leave your device — no uploads, no servers.
Smart resizing
Set a max width and every image is scaled down proportionally — aspect ratio always preserved.
Bulk rename
Rename the whole batch with a prefix and auto-numbering, ready for a clean, consistent export.
One-click download
Grab a single optimized file or export the entire batch as a ready-to-ship .zip.
Many input formats
Bring JPG, JPEG, PNG, WebP or AVIF — see a live before/after comparison for every image.
Three steps, zero friction
Add your images
Drag & drop or pick files. Thumbnails appear instantly.
Choose your settings
Pick output quality and max width, then hit Start.
Download the results
Rename, compare, and export a single file or the whole batch.
How it compares
The bulk workflow of an online compressor, with the privacy of a local tool.
| Image Optimizer | TinyPNG & similar | Squoosh | CLI tools | |
|---|---|---|---|---|
| Images stay on your device | Always | Uploaded to their servers | ||
| Bulk processing | Whole folders at once | Limits on free plan | One image at a time | Requires scripting |
| Bulk rename + .zip export | Build it yourself | |||
| No coding required | ||||
| Pricing | Free · Pro $19 once | Subscription for full use | Free | Free |
Simple pricing
Start free, no account needed. Go Pro once — it's yours forever.
Free
No sign-in. Just open and optimize.
- Up to 10 images per batch
- WebP, AVIF, JPEG & PNG output
- Compression + smart resize
- Before / after compare
- Single-file download
- 100% private — no sign-in
Pro
First 10 customers just $9. Pay once, use forever.
Everything in Free, plus:
- Unlimited batch size
- Download all as .zip
- Bulk rename
- Config presets, synced across devices
- Per-image overrides
Sign in with Google to sync your license — your images still never leave your browser.
Your images are always processed in your browser and never uploaded. Pro only adds account-synced workflow tools.
Frequently asked questions
Are my images uploaded anywhere?
No. Your images are optimized on your own device and never sent anywhere — there is no upload step at all. Nothing to store, nothing to delete afterwards, because we never receive your files.
Will a big batch slow down or crash my browser?
No. A batch runs in the background, so the page stays responsive while it works, and everything is cleaned up once the batch finishes. How fast it goes depends on your device — typical web-size images are no problem, even in large batches.
Why pay when free tools exist?
The Free plan here is already unrestricted in file size, converts to every format (including AVIF), and never uploads your images. Pro is a single $19 payment — no subscription — and unlocks unlimited batch size, .zip export, bulk rename and synced presets.
Why do I need to sign in for Pro if everything runs in my browser?
Signing in only ties your license to your account and syncs your presets across devices. Your images are still handled entirely on your own device — an account covers your license and settings, never your files.
How do I fix the "Serve images in next-gen formats" PageSpeed warning?
Convert your images to WebP or AVIF. Drop them into the tool above, pick WebP or AVIF, and re-upload the optimized files to your site.
Which format should I choose — WebP, AVIF, JPEG or PNG?
WebP is the safe default for the web: small files, universal browser support. AVIF is even smaller but encodes slower. Use JPEG for maximum compatibility and PNG when you need lossless quality or transparency.