Is the quality setting equivalent to libwebp's -q parameter?

Deliteful uses quality 80 as the default, consistent with common web optimization recommendations. The 1–100 scale maps to WebP lossy compression strength — quality 80 delivers strong compression with minimal perceptible loss on photographic content.

What is the maximum batch size for WebP conversion?

Deliteful supports up to 50 files or 2GB per batch, whichever limit is reached first. Individual image files must be 50MB or under.

Does this preserve alpha channels from PNG files?

Yes. PNG transparency is preserved in the WebP output. This makes it suitable for converting UI assets, icons, and sprite sheets where alpha is required.

Can I use this to migrate a legacy image library to WebP?

Yes. For bulk migrations, upload files in batches of up to 50 at a time. Each batch produces a corresponding set of WebP files you can integrate directly into your project or CMS.

Batch Convert PNG and JPEG to WebP Without Local Tooling

Setting up ImageMagick, libvips, or ffmpeg locally — or wiring them into a CI pipeline — takes time you don't always have. Deliteful converts PNG and JPEG images to WebP in-browser with no local dependencies, making it practical for one-off migrations and asset prep tasks.

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For ad-hoc image conversion tasks — migrating a legacy asset library, preparing images for a new CMS, or generating WebP variants for a static site — a browser-based batch converter is often faster than spinning up a script. Deliteful processes up to 50 files per batch and returns all outputs as individual WebP files you can drop directly into your project. No API key, no Docker container, no cleanup.

The quality parameter (1–100, default 80) behaves consistently with libwebp's -q flag. If you're used to targeting quality 80 for web-optimized JPEG exports, the same setting transfers directly. Alpha transparency is preserved from PNG sources — useful for converting sprite sheets or icon sets without manual inspection.

How it works

1
Upload your PNG or JPEG files
Upload up to 50 files in one batch; individual images up to 50MB each are supported.
2
Configure quality
Set the quality value (1–100); 80 matches the libwebp default for most web optimization use cases.
3
Download WebP outputs
Each input produces one WebP file; download individually or as a batch for direct project integration.

Frequently asked questions

Is the quality setting equivalent to libwebp's -q parameter?: Deliteful uses quality 80 as the default, consistent with common web optimization recommendations. The 1–100 scale maps to WebP lossy compression strength — quality 80 delivers strong compression with minimal perceptible loss on photographic content.
What is the maximum batch size for WebP conversion?: Deliteful supports up to 50 files or 2GB per batch, whichever limit is reached first. Individual image files must be 50MB or under.
Does this preserve alpha channels from PNG files?: Yes. PNG transparency is preserved in the WebP output. This makes it suitable for converting UI assets, icons, and sprite sheets where alpha is required.
Can I use this to migrate a legacy image library to WebP?: Yes. For bulk migrations, upload files in batches of up to 50 at a time. Each batch produces a corresponding set of WebP files you can integrate directly into your project or CMS.

Create your free Deliteful account with Google and run your first WebP batch conversion without any local setup.