Are my images uploaded to a server?

No. All conversions run locally in your browser via Canvas. No uploads or servers involved.

Does it preserve transparency?

Yes. PNG output preserves alpha transparency.

Is there a file size limit?

It depends on your browser and device memory. Very large images may fail due to memory limits.

WEBP & AVIF to PNG Converter (Offline

Convert WEBP or AVIF to PNG (fast, private, and offline)

WEBP and AVIF are modern image formats that deliver excellent compression and high visual quality. However, certain workflows still require PNG for lossless editing, alpha transparency in legacy tools, or compatibility with CI/CD pipelines and desktop apps. This page explains when to prefer PNG, how offline conversion works in your browser, and how to fix common issues such as memory limits, color shifts, or failed previews. Everything below is written for non-experts but includes power-user tips for batch processing and automation.

When should you convert to PNG?

Lossless editing: PNG keeps exact pixel data, ideal for pixel art, UI assets, and scientific plots.
Alpha transparency: Some apps mishandle WEBP/AVIF alpha; PNG supports it universally.
Tool compatibility: Older CMS, printers, and desktop software expect PNG.
Automation: Build steps that rely on PNG (e.g., sprite sheets) are still common.

How does offline conversion work?

This tool decodes images via the browser’s native decoders (ImageBitmap or HTMLImageElement) and re-encodes using Canvas toBlob. No data leaves your device. On slow machines, decoding very large images can exhaust memory. If that happens, close other tabs or split batches.

Troubleshooting

“Preview failed”: Your browser may lack AVIF support. Update Chrome/Edge/Firefox/Safari and try again.
Color differences: Check color profiles; some viewers ignore embedded ICC.
Huge output: PNG is lossless; try optimizing later with pngquant/oxipng if size matters.
Memory errors: Convert fewer files at once or reduce image dimensions beforehand.

Privacy and security

Conversions happen locally; no uploads, servers, or databases are involved. If you handle confidential imagery, this approach avoids the compliance risk of cloud uploads.

Batch workflow tips

Use “Convert all” for small/medium batches; for huge sets, run in smaller chunks.
Organize output with a dedicated folder; the tool keeps original filenames and swaps the extension to .png.
Check transparency in an editor if the source had semi-transparent pixels.

FAQ · Is this converter suitable for enterprise use?

Yes—many enterprises prefer client-side tools for privacy reasons. You can audit the page easily since it’s static.

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