Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Convert multiple JPG images to WebP in one batch.
Converted files will appear here.
WebP is a modern image format that typically produces smaller file sizes than JPG at comparable visual quality, which helps page load speed -- but converting a whole folder of JPGs one at a time is tedious. This tool converts multiple JPG images to WebP in a single batch, right in your browser.
Upload multiple JPG images at once. Each is converted to WebP format. Download the results individually, or all together as a single ZIP file.
Each JPG is drawn onto a canvas, then exported using the browser's native WebP encoding support -- the same image-export pipeline used throughout the Canvas API, just targeting a different output format. Multiple converted files are then bundled together into one ZIP archive for convenient one-click download.
Web developers and site owners converting an entire folder of product or blog images to WebP for better page load performance. Bulk-preparing image assets for a website migration or redesign that adopts WebP as the standard format.
WebP is very widely supported across modern browsers, but if your project needs to support extremely old browsers without WebP support, keep JPG fallbacks available (a common pattern is serving WebP with a JPG fallback via the HTML <picture> element).
Say you have a folder of forty product photos saved as JPG. Select them all in the file picker, wait for each to be processed, and then use the ZIP download to get every WebP in one archive. Compare a few before and after by opening them side by side at full size. Compare file sizes in your file manager rather than trusting a general claim; savings vary from image to image depending on content, so measure your own results before deciding to replace the originals.
Converting a lossy JPG into another lossy format means the picture passes through compression twice. For most web photos this is visually acceptable, but always inspect images with smooth gradients, sky, or fine text, where artefacts show first. Keep your original JPGs; treat the WebP set as a delivery copy, not a replacement. Very large batches or very large source images use browser memory, so if the tab becomes slow, convert in smaller groups of files.
Converted files typically keep their base name with a new extension. Before uploading to a site, check that your templates or content management system reference the correct extension, and remember that links to old .jpg addresses will break if you delete the originals. A tidy approach is to keep both sets in separate folders and update references in one pass.
If you publish both formats, the HTML picture element lets a browser choose the WebP source and fall back to the JPG when needed. Also set width and height attributes on images so the layout does not jump while they load. Test the finished page on a phone and on a desktop browser to confirm every image displays.
WebP typically achieves smaller file sizes than JPG at similar visual quality, which improves page load speed -- a meaningful factor for both user experience and search engine ranking.
The tool is built for batch conversion of multiple files together -- practical limits depend on your device's available memory for very large batches or very large source images.
No. The tool creates new WebP files for download and leaves the files on your device untouched.
Not exactly. The image is re-encoded, so tiny differences are possible. Check important images at full size before publishing.
The conversion uses your browser's own image encoding, so the files are processed on your device.
File size depends on image content and how compressed the original already was. Some images gain little, so compare sizes rather than assuming a fixed saving.