Optimize WebP Images
Let Pixellin find the right WebP quality for each image. It keeps the smallest version that still measures as visually identical and removes metadata.
- On-device
- No sign-up
- Batch
- Free, no watermark
Drop images on the plate
or paste with Ctrl/⌘ V
Processed on this device
How it works
- 01Drop, choose or paste the WebP images to optimize.
- 02Set a long-edge cap if your images are oversized.
- 03Select Process and check the size saved on each image.
- 04Download each WebP or use Download all for a ZIP.
Why use this tool
Per-image quality
Instead of one slider value for everything, each WebP is tested at several qualities and the smallest identical-looking one is kept.
Lighter web pages
Smaller WebPs help hero images and galleries load sooner, especially on mobile connections.
Resolution capped if needed
An optional long-edge cap of 1920, 2560 or 3840 px trims images that are larger than your layout needs.
Supported formats
Use cases
Static site builds
Optimize WebP images before adding them to a static site or app bundle so deploys stay small and pages stay quick.
Blog image backlogs
Run a backlog of WebP blog images through once so older posts load as quickly as new ones, without re-tuning each file by hand.
Ecommerce galleries
Product galleries with many WebP images benefit from per-image tuning: busy patterns and plain backgrounds each get a fitting setting.
Technical details
WebP is already efficient, but the right quality varies from image to image. A single slider value either wastes bytes on simple images or shows artifacts on complex ones. Optimize WebP encodes several candidates per file, scores each against the original with SSIM, and keeps the smallest that stays above the visually identical threshold. Images stay WebP, so nothing in your markup has to change, and metadata is stripped.
If one specific quality must be applied to every image, Compress WebP gives you the slider instead. To see the quality and similarity score Pixellin picked for each file, or to choose a looser or stricter target, use the Image Quality Optimizer. The optional long-edge cap of 1920, 2560 or 3840 px handles oversized source images in the same pass.
Your files stay with you
This tool runs entirely inside your browser using Web Workers and WebAssembly. Your images are never uploaded, never stored on a server and never used to train AI. Close the tab and they’re gone. Learn more
Frequently asked questions
How do I optimize WebP images for my website?
Add the WebP files, choose a long-edge cap if they are larger than your layout, and select Process. Each image is tuned automatically and metadata is removed. Download them individually or as one ZIP and replace the originals on your site.
Can a WebP be optimized further if it’s already WebP?
Often, yes. Many WebPs are saved at a fixed high quality. Re-encoding at the lowest quality that still measures as visually identical can trim more. If no smaller version is possible, the original is kept and marked “Already optimized”.
Should I convert my WebP to AVIF instead?
AVIF can be smaller still, but encoding is slower and some older software can’t open it. If your site already serves WebP, optimizing it is the quick win. The Optimize AVIF tool accepts WebP input if you want to compare the two.
Is optimizing WebP lossy?
Lossy WebP re-encoding does discard some data, but the optimizer only keeps a result that scores above its visually identical threshold. In practice, the difference shouldn’t be visible next to the original at normal viewing size.
Related tools
Compress WEBP
Re-encode WebP images at the quality you choose to make them lighter for the web.
RESIZE · WEBPResize WEBP
Resize WebP images to the size your page displays and keep them in WebP, a format built for web delivery.
CONVERT · WEBP → JPGWEBP to JPG
Saved an image from a website and it won’t open, attach or upload?
CONVERT · WEBP → PNGWEBP to PNG
Turn WebP images into PNG when you need to edit them, keep a transparent background, or use them in…
METADATA · JPG · PNG · WEBPRemove EXIF Data
Remove location, camera and date information from your photos without touching a single pixel.
OPTIMIZEImage Optimizer
Drop your images and let Pixellin choose the settings.