How to Convert JPEG to WebP in Bulk for Free

WebP photos are smaller than JPEG photos at similar quality, which means faster web pages and less storage. Converting one photo is easy. Converting fifty is a chore, unless you convert the whole batch at once. This guide shows how to convert many JPEG files to WebP in one go, for free, in your browser, with no sign-up and no uploads.

What you need before you start

First, a quick note on the name. WEBG is not a real image format. People often type WEBG when they mean WebP, the modern image format from Google, and WebP is what this guide is about. Gather your JPEG files in one folder before you start, so you can select them all at once. Keep a copy of the originals. Conversion is one-way in practice: once you have the smaller WebP files, you should still keep the JPEG masters in case you need them later. Finally, decide on quality. A setting around 80 is a good starting point for web photos: clearly smaller files, with no visible difference for most pictures.

How to convert JPEG files to WebP in bulk

1. Select all your JPEG files at once. In the file picker, select two or more JPEG photos together instead of converting them one at a time.
2. Set the quality with one slider. Start at 80. If the files are still too large, try 70. If a photo looks soft, raise it to 85 or 90 and convert again.
3. Convert the whole batch. Click the convert button once and let the tool work through every file. Do not close the tab while it runs.
4. Check a few results. Open one or two converted WebP files and look at faces, small text, and edges. If they look clean, the batch is good.
5. Download your files. Save each WebP on its own, or download all of them together in a single ZIP file, which is much faster for a large batch.
6. Keep the originals. Store the JPEG folder somewhere safe, and use the WebP copies for your website, upload, or sharing.

A worked example

Imagine you have 30 product photos for a small shop website, each a JPEG of a few megabytes. You select all 30 at once, set quality to 80, and convert. Each photo becomes a smaller WebP file, and you download the whole set as one ZIP. You unzip it into your website’s image folder, and your pages load faster, with no visible loss in the photos. The whole job takes minutes, where converting one file at a time would take the better part of an afternoon.

Mistakes to avoid

• Do not convert from an already converted file. Always start from the original JPEG, or quality drops with every round.
• Do not set quality to the lowest value just to save space. Below a certain point, photos look blocky, and no file size saving is worth that.
• Do not delete your JPEG originals until you have checked the WebP files open correctly.
• Do not upload private photos to a server-based converter when a browser tool can do the job on your own device.

Try it faster with the free tool

The free Batch JPEG to WebP Converter below does exactly this: pick a whole set of files at once, set the quality with one slider, and download each WebP on its own or all of them together in a single ZIP file. Everything runs in your browser, free, with no sign-up.

Try it here: Batch JPEG to WebP Converter.

Select them all, set quality to 80, check a couple of results, and download the ZIP. Batch conversion turns an afternoon of clicking into a five-minute job.