WebP Converter‪.‬ 4+

Offline Batch WebP Converter

Reiji Kobayashi

    • 4.9 • 110 Ratings
    • Free
    • Offers In-App Purchases



Unlimited Batch convert HEIC, PNG, JPG (and much more!) to WebP without upgrading.
Unlimited Batch convert WebP to PNG (to JPEG is enabled by upgrading).
Add watermark with converting.(In App Purchase)

# Easy to Use
You can drag & drop images, folders and directory from web browsers like safari.
You can output multiple type of images in one time.

# Support Images Type
and more: jp2, j2k, jpc, bmp, jbig, bie, pnm, pgm, pbm, mag.

# Secure
All processes are done in your mac.
You don't need to upload your important images to the Internet.

# In App Purchase - Quality, Resize, Preview Pack
- Convert WebP to JPEG.
- WebP encoding options. (Lossless, Preset, Method, Keep Color Profile and Sharp YUV)
- Keep Color Profile.
- Change output WebP quality.
- Resize with maxWidth and maxHeight.
- Preview result.
- Keep original extension at filename.
- Adding prefix or suffix at filename.
※ Lossless may be automatically a little lossy for stable encoding depending on the image.

# In App Purchase - Unlimited Watermark image Pack
- No limit to add watermark.

# And More!
Dark mode is supported.

※ If you have any request, please feel free to send an E-mail to sonice.d1v1b[-]gmail.com. ([-]→@)
※ Please note that macOS dafault apps (ex:Finder and Safari) cannot read correct WebP Color Profile yet.
※ Please restore purchase after reinstall the app.
※ Open Help > In App Purchase to see the detail about In App Purchase.
※ Please refer https://d1v1b.com/1/termofuse for the Terms of Use.

What’s New

Version 5.1.4

- Added an option to decide where to save files at the start of conversion.
- Added an option to add a prefix/suffix to the file name.

Ratings and Reviews

4.9 out of 5
110 Ratings

110 Ratings

BlueTopiary ,

Just get the premium version

I have used a lot of methods to convert to WebP, and this is by far the easiest. This tool (paid version) allows me to set a max width OR height, which is excellent for handling landscape and portrait images in the same batch. Then, there's the auto-start feature which makes moving through the process a breeze, when paired with "save in original image folder". I just drop groups of files in to be optimized and its off to the races. Very quick conversion, and I have also found the compressed image sizes to be smaller than several other tools I have used like Squoosh or WebPShop (Photoshop).

Developer Response ,

Thank you for upgrading and your review.

I'm glad to hear that the app is useful for you.

Mileschauvin ,


Fast with an elegant simple interface. I looked for other products this dev had as well.

Madmarlin1 ,

great and fast conversion to webP

Excellent conversions with options for resizing to whatever you want.

App Privacy

The developer, Reiji Kobayashi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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