Resize WEBP Image Online

WEBP is the modern web format built to replace PNG and JPEG at a fraction of the size. It packs both lossy and lossless compression plus full transparency into one lightweight container, which is why browsers, CMS platforms, and performance tools all recommend it. The catch is that WEBP files often arrive inside design exports or converters where trimming a frame still means opening heavy software. For a quick resize or a transparent asset at an exact size, that overhead is unnecessary, and most sources export far larger than needed so a tight resize also trims wasted pixels. Performance budgets depend on small assets, so sizing WEBP correctly is a real win for page speed.

UnoIMG’s free WEBP resizer makes the job effortless in the browser. Drop a single image or a whole folder of WEBPs and every file is queued at once. Choose how to size them: scale by a percentage, set an exact target width while the height follows the ratio, enter precise width and height, or snap to a social preset like Instagram Square 1080×1080 or YouTube Thumbnail 1280×720. By default the tool keeps the WEBP format, so the alpha channel and every transparent pixel survive the resize untouched. Pick JPEG only when a solid background is fine—and it simply fills your chosen color instead of turning transparency black—or stay with WEBP for the smallest transparent file. A quality slider fine-tunes JPEG/WEBP output while the resize itself uses the image’s real pixels.

The payoff reaches everyone who ships transparent web graphics. Designers resize hero images and sticker art for instant-loading pages; developers prepare lightweight assets that stay sharp on every screen; marketers scale product and social images without losing clean edges. E-commerce stores fit WEBP cutouts into category grids, and agencies deliver client assets in exact sizes. Teachers resize diagram art for worksheets, and photographers export web galleries that open quickly on any device. Social creators reuse the same resized set across every platform. Each result appears with its own preview, so you can compare several versions on screen and pull them all down in one ZIP.

Best of all, the process is private and free. Resizing runs entirely in your browser, so your WEBPs are never uploaded to a server or stored anywhere—nothing leaves your device, which keeps sensitive designs and logos fully on your machine. There is no watermark, no account, and no desktop software to install. Download each image on its own or grab everything at once as a single ZIP, which makes bulk asset prep fast and tidy. Whether you keep WEBP for its tiny size, switch to PNG for compatibility, or export JPEG with a background fill, UnoIMG fits naturally into any daily workflow, helping you size the perfect image in just a few seconds.