● Free · Local browser processing

Convert multiple PNG images to WebP

Turn multiple PNG files into WebP without uploading the source images. Choose output quality, preserve or limit dimensions, and download the results as ZIP.

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Drop images or choose files

JPEG, PNG and WebP · Multiple files supported · Files never leave your device

Selected files 0

Results

Your processed images will appear here.

Direct answer · batch png to webp converter

Can I convert many PNG files to WebP at once?

Yes. Select multiple PNG files, choose the prepared WebP settings and run one batch. Kompixa encodes the outputs in the browser and packages completed files into a ZIP.

Evidence on this page

The workflow accepts multiple files, exposes quality controls and publishes a same-browser format benchmark.

Important limit

Browser WebP encoding is not identical to every server codec, and complex transparent graphics should be visually checked before replacing their PNG originals.

Why use Kompixa?

The settings are ready for this exact task when the page opens.
No upload, account or watermark
Batch processing and predictable file names

How it works

Convert multiple PNG images to WebP in one batch and download the results together as a ZIP.

Common questions

Are my images uploaded?

No. Processing runs inside your browser and the original files are not sent to Kompixa.

Which formats work?

This first release supports JPEG, PNG and WebP. Browser support can vary.

What is this workflow optimized for?

Convert multiple PNG images to WebP in one batch and download the results together as a ZIP.

Observed PNG-to-WebP result

In one browser test, a 1920 × 1080 PNG screenshot changed from 1.26 MB to about 102 KB as WebP. This is one measured example, not a universal compression ratio.

Input	Output	Dimensions	Notes
PNG · 1.26 MB	WebP · about 102 KB	1920 × 1080 → 1920 × 1080	Screenshot content, processed locally in the browser.

Observed by Salih Can Kurnaz · Updated 2026-08-01. The same test is documented in the case study.

Batch conversion workflow

Add several PNG files at once.
Leave dimensions unchanged or set maximum width and height.
Select a starting quality appropriate for screenshots or photos.
Convert and review the individual output sizes.
Download one file or the whole batch as ZIP.

When WebP is a good fit

WebP is useful for websites, product screenshots and image-heavy pages where transfer size matters. Keep the original PNG when you need a lossless archival source, pixel-identical editing input or compatibility with a workflow that does not accept WebP.

Keep both: preserve the original PNG as your master file and use the WebP copy for delivery.

Practical guide

PNG, JPEG or WebP: which format should you use?

Compare transparency, photographic detail, sharp interface graphics and typical web-delivery trade-offs before converting a batch.

Read the guide

Task-specific conversion details

Batch PNG to WebP with transparency checks and reproducible settings

This workflow is designed for a PNG batch rather than a single-file demo. Select files or a folder, review the shared output settings, override individual files when needed and download the completed batch as a ZIP.

Transparency is kept in WebP

PNG alpha is drawn into the browser-generated WebP output. Keep the original PNG as the editable source, because the quality slider uses the browser’s lossy WebP encoder rather than promising a mathematically lossless conversion.

Quality is measurable

Use the 12-scene quality matrix to compare quality 60, 80 and 90, or run the full 100-scene benchmark before choosing one setting for a large library.

One batch, several controls

Maximum dimensions, target KB, predictable names, per-file overrides and ZIP download can be used without moving the source images to a Kompixa server.

Verify the result

Each output card shows source and processed previews, dimensions, format, byte reduction and common metadata-verification status.

Run the format benchmark Read the PNG and WebP guide

Related image tools

Compress Images to 500KBReduce multiple JPEG, PNG or WebP files below 500KB while keeping as much visual quality as possible.Compress Photos for EmailMake multiple photos easier to attach to email by reducing dimensions and file size in one batch.Batch Resize and Rename ImagesResize many images to consistent maximum dimensions and apply predictable file names in one workflow.Remove Metadata from Multiple PhotosRe-encode several photos locally to remove embedded EXIF and GPS metadata before sharing.Resize Images and Download as ZIPResize multiple images together and download every processed file in a single ZIP archive.Convert, Resize and Compress ImagesRun format conversion, resizing, compression, metadata removal and renaming in one batch workflow.Optimize Images for a WebsitePrepare web-ready images with WebP conversion, sensible dimensions, smaller files and clean names.

Workflow and documentation maintained by Salih Can Kurnaz. See the latest changes.

Measured browser evidence

What the published reference run measured

In the balanced 100-scene Brave 150 run, WebP at quality 82 produced a 78.2% median saving versus the same-scene PNG baseline. Category medians were 92.8% for photo-like detail, 54.1% for interface/text, 83.6% for transparent graphics and 72.4% for flat illustrations. Results describe one browser and device, so representative production images should still be tested.

Review the benchmark and limitations