Free
$0
- 100% local compression, no image uploads
- Up to 50 images per batch
- Keeps nested folder structure in the ZIP
Swiftiny
Convert PNG to WebP in batches, locally
Output format is set to WebP on this page. Drop PNG files (JPG works too), convert them in your browser, and download a ZIP. Folder paths are preserved. Nothing is uploaded.
Why convert to WebP hereWebP is usually much smaller than PNG for photos and UI with similar quality. Doing the conversion locally avoids upload limits and keeps unpublished assets off a third-party server.
Drop images or folders here
Supports PNG, JPG, WebP, and AVIF. You can choose files or folders, and folder paths are kept in the zip.
Selected0 image(s)
Original size0 B
Output size0 B
Savings0%
Select or drop multiple images, then start compression. By default, the tool aims to reduce size while preserving visual quality, and you can compare sizes after processing.
Compression settings
Batch PNG to WebP without an upload queue
Online converters often cap file size or count because every image is uploaded. Swiftiny converts in the browser: choose PNG files or a folder, keep quality around 82, and download WebP files named for the originals.
If you drop a folder, the ZIP still contains the same nested directories, only the extension changes to .webp. That makes it straightforward to swap assets on a site or in a design export.
You can still switch the output format back to PNG or JPG in the settings. Free batches are limited to 50 images; Pro unlocks unlimited images per batch with a one-time purchase.
Frequently Asked Questions
Is PNG to WebP conversion done on a server?
No. Conversion runs in your browser. Your PNGs are not uploaded to Swiftiny.
Can I convert a whole folder of PNGs to WebP?
Yes. Choose a folder or drop nested directories. The ZIP keeps the original structure with .webp files inside. Free use allows up to 50 images per batch.
What quality setting should I use?
The default quality of 82 is a solid starting point for web use. Raise it if you see artifacts; lower it if you need smaller files. Deep mode can reduce size further.
Pricing
Free to try. Pro when batches get big.
Compression still happens on your device. Pay once for unlimited images per batch — Creem handles checkout, cards, and tax.