Bulk WebP converter
This tool converts multiple images to WebP format in one batch, with no limit on file count. Each image is processed in your browser and can be downloaded individually or together as a ZIP file — nothing is uploaded to a server.
- Free
- Unlimited
- No Uploads
- Works Offline
Why convert to WebP
There's rarely a reason not to convert images to WebP today — it's typically 25–35% smaller than JPEG or PNG at the same visual quality, which means faster page loads. Converting an entire image library one file at a time is slow; this tool processes a whole folder in one pass.
How it works
Step 1
Upload
Select as many images as you want. All of them stay on your device.
Step 2
Convert
Every file is converted to WebP, one batch, no per-file limit.
Step 3
Download All
Grab individual files or everything at once as a ZIP.
Frequently asked questions
- Is there a limit on how many images I can convert?
- No. Because processing happens on your own device rather than a server, there's no file-count limit — though very large batches will take proportionally longer.
- Can I convert WebP back to JPEG or PNG?
- This tool currently converts to WebP only. Reach out if you need reverse conversion — it's a straightforward addition, so consider requesting it.
- Does converting to WebP reduce image quality?
- WebP uses efficient compression that's generally visually equivalent to JPEG at a smaller file size. You can always compare the output against your original before publishing.
- Is PublishFit free to use?
- Yes. There's no account, no subscription, and no limit on how many images you can convert — PublishFit is free to use, on this tool and every other one on the site.
- Can I use this on my phone?
- Yes. PublishFit works in any modern mobile browser, including selecting multiple photos at once from your camera roll — though processing a large batch may be slower on a phone than on a desktop.
Where this helps
- Migrating an image library to WebP
- Preparing a product catalog
- Batch-converting a photography portfolio
- Cleaning up a media library before a redesign
- Bulk-optimizing a blog archive
Your files never leave your device
Every tool on this site processes images entirely in your browser. Nothing is uploaded, nothing is stored on our servers.Read our full privacy commitment.