WebP converter for Mac
Convert a folder of images to WebP in one batch
To convert images to WebP on a Mac in bulk, drag your JPG, PNG, or HEIC files (or a whole folder) into ImageCrush, set the output format to WebP, pick a quality around 75%, and export. The batch converts in one pass, with optional resizing and renaming, entirely on your Mac.
$14.99 one-time · macOS 15.7+ · No account required
How to batch convert images to WebP on a Mac
Add your images
Drag in JPG, PNG, HEIC, HEIF, or AVIF files, or a whole folder. Subfolders are included when you use Choose Folder.
Choose WebP
Set Output Format to WebP. It supports transparency, so PNGs with alpha channels convert cleanly.
Set the quality
Around 75% is the sweet spot for the web. Use the before/after slider to check any image at full detail before you commit.
Cap the dimensions
Set a maximum width and height, like 2000 px for hero images or 1200 px for blog content. Aspect ratio is preserved, and images are never upscaled.
Rename for your project
Add a suffix or a custom name with sequence numbers so the files drop straight into your site or CMS.
Export and save a preset
Export to a new folder; originals stay untouched. Save it as a preset (the built-in Web Optimized preset is a good start) and reuse it on every project.
Why WebP for the web
WebP is the practical default for website images: much smaller than JPEG and PNG, transparency support, and support in every current major browser.
In our format benchmarks at 75% quality, WebP averaged 336 KB vs 1,300 KB for JPEG on illustrations, 245 KB vs 618 KB on screenshots, and 95 KB vs 278 KB on UI assets. Against PNG sources the gap is far bigger: a 2.9 MB PNG screenshot came out at 177 KB.
Smaller images mean faster pages and better Core Web Vitals, especially Largest Contentful Paint.
When WebP isn’t the right call
Email: stick with JPEG. Email client support for WebP is still patchy.
iPhone HEIC originals: converting a high-resolution HEIC to WebP at high quality can produce a larger file. Use a moderate quality, resize, or consider AVIF.
Re-compressing JPEGs: converting an already-compressed JPEG to WebP stacks lossy compression on lossy data. Start from the highest-quality original you have.
Maximum compression: AVIF beats WebP in every category we tested, if your audience’s browsers support it.
Better than a build step alone
Frameworks like Next.js can serve WebP automatically, but your source images still matter. A folder of 5 MB originals means slower builds, bigger repos, and bigger CDN bills.
Pre-optimizing in ImageCrush gives you right-sized WebP sources in seconds, without a script to maintain, and you can see the size and quality of every file before it ships.
Frequently asked questions
Can’t find what you’re looking for? Ask us directly.
Drag the images or a folder into ImageCrush, choose WebP as the output format, set the quality, and export. The whole batch converts in one pass. macOS’s built-in Convert Image Quick Action doesn’t offer WebP output.
Around 75% is the best balance for most web images. Going from 90% to 75% roughly halves the file size with little visible difference, while dropping below 60% starts to show artifacts in gradients and fine detail.
Yes. WebP supports alpha channels, so transparent PNGs such as logos, icons, and UI assets can be converted to WebP without losing transparency, usually at a fraction of the size.
Every current major browser supports WebP, including Safari, Chrome, Firefox, and Edge. If you need to support very old browsers, serve WebP with a JPEG fallback using the HTML picture element. See the full format comparison
Yes. ImageCrush imports WebP and exports JPG, PNG, WebP, HEIC, and AVIF, so you can convert WebP files to JPG for email or to PNG for editing.
No. ImageCrush converts everything locally on your Mac inside Apple’s App Sandbox. It works offline and has no file-count limits.
Related reading
Try it on your next batch
The 7-day trial includes every feature, with no account and no credit card. If it earns a place in your workflow, it’s a one-time $14.99.