Move a collection,
not one file at a time.
Choose one typed route, drop a folder, review memory and fidelity, preserve relative paths, and run a cancellable local batch. This is ideal for modernizing image libraries, normalizing documents, or repackaging compatible assets.
01 · ChoosePick one source-to-target rule.02 · PreviewReview file count, bytes, route, warnings, and naming.03 · ConvertWatch every job, cancel or retry failures, and keep successful outputs.04 · ExportDownload individually, as a ZIP, or to a chosen folder where supported.
Folder privacyBrowser folder selection exposes files only to this tab. OmniCastConverter never stores source names or content, and “skip unchanged” lasts only for the current tab.
Universal workbench
PNG to WebP
Create WebP from PNG locally, with no upload or account.
Device-onlyNo uploads. Ever.
Help me choose the best output Suggested: PDF
Recommendations use the registered target format and tested fidelity classification. They never inspect or upload your content.
01Input
Drop files or a folder hereChoose PNG files or a folder — batch input is welcome
or paste content
02Configure & run
PNGWebP
lossy conversion · single or batchConversion preflightSize, memory, engine, execution, and fidelity before you start
- Input
- 0 B
- Estimated peak memory
- 48 MiB
- On-demand download
- No large engine download
- Execution
- Responsive local worker
- Fidelity
- Review output · one or more lossy steps
What to provideDrop one or more PNG files; this format cannot be pasted as plain text.What you’ll getProduces a downloadable WebP file with the correct extension and MIME type.
Useful presetsTransparent, editable settings—not opaque quality labels
Output naming & batch behavior
Example
output.webpPipeline 1 linear · 0 branches
Why use A → B → C?
A pipeline feeds each result directly into the next compatible converter. Use one when the destination needs an intermediate representation or when you want to inspect and normalize that middle format.
JSON → CSV → XLSXturns records into rows before building a workbook.Markdown → HTML → DOCXresolves markup before creating a document.SVG → PNG → PDFintentionally flattens vector artwork before placing it on a page.
1PNG to WebPlossy
This step can discard source detail. Review its output before relying on it.Add content above to start. Nothing leaves this browser.
Processing happens locally. Your file bytes are never sent anywhere.