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GetWebP uses WebAssembly to run image codecs — including the official libwebp encoder — entirely inside your browser tab. No image data is ever sent to a remote server, logged, or stored. This architecture makes GetWebP fully GDPR-compliant by default: there is no data processor, no cloud storage, and no risk of third-party exposure.

Because processing happens on your own CPU, conversion speeds scale with your hardware and there are no server-side queue limits. A 50-image batch that would take minutes to upload, process, and download on a cloud tool completes locally in seconds.

This also means GetWebP works in air-gapped environments and restricted networks where uploading sensitive images to external services is prohibited.

WebP is Google's open image format, supported by all modern browsers since 2020. Compared to JPEG, WebP reduces file size by 25–35% at equivalent visual quality for photographs, and up to 90% for graphics and illustrations that previously required PNG. GetWebP uses the reference libwebp encoder to ensure maximum compatibility and standard-compliant output.

AVIF (AV1 Image File Format) is the next step beyond WebP. Based on the AV1 video codec, AVIF achieves even greater compression — typically 20–50% smaller than WebP — especially for photographs. It is now supported in Chrome, Firefox, Safari, and Edge.

GetWebP lets you choose between WebP and AVIF, preview the output quality before committing, and adjust the quality slider to find the perfect balance between file size and fidelity.

GetWebP exposes the full quality range of the WebP and AVIF encoders, from lossless (quality 100, bit-for-bit identical pixels) down to aggressive lossy compression for thumbnails and previews. The interactive quality slider shows a real-time before/after comparison so you can judge the visual impact before saving.

For most web use cases, a quality setting of 75–85 delivers files 60–80% smaller than the original JPEG or PNG with no perceptible quality difference on screen. For product photography where fine detail matters, lossless WebP gives you an exact pixel copy in a fraction of the PNG file size.

Rather than converting images one at a time, GetWebP lets you queue an entire folder of images and apply a single set of conversion settings across all of them. Free users can process up to 5 images per session; Pro users have no limit.

Each image in the batch is processed in a separate Web Worker thread, keeping the main browser thread responsive. Progress is shown per-file, and the final output is packaged into a single ZIP download so you can replace an entire image directory in one step.

Search engines use image filenames as a ranking signal for Google Images. A file named IMG_4021.jpg tells the crawler nothing; my-handmade-leather-wallet.webp tells it exactly what the image shows and matches the queries people actually type.

GetWebP's SEO rename feature lets you set a base keyword, and the tool automatically slugifies it — lowercased, hyphen-separated, stripped of special characters — to produce clean, crawler-friendly filenames. In a batch, each file is numbered sequentially (e.g. handmade-leather-wallet-1.webp, -2.webp) so the output is immediately ready for upload without manual renaming.

GetWebP is a Progressive Web App (PWA) that caches all required assets on first visit. After that, you can convert images with no internet connection at all — useful on flights, in fieldwork, or in secure environments where network access is restricted.

Because all image codecs run in WebAssembly locally, offline mode is fully featured: there is nothing that requires a server call. The extension version works offline by default since it runs entirely in the browser extension context.