.png.webp
How to Convert PNG to WebP
To convert PNG to WebP, upload your PNG above, select WebP output, and download a file that is typically 26–70% smaller with no visible quality change. WebP supports both lossless and lossy modes plus full alpha transparency, so your transparent PNGs stay transparent. All modern browsers — Chrome, Firefox, Safari 14+, Edge — display WebP natively.
This page is part of the Image Converter hub, which covers every image format pair JoltFile supports.
In-browser image limit: 100 MB per file
Browser-based processing — your files never leave your device
Need files over 100 MB, batch conversion, or keyboard shortcuts?
JoltFile desktop appHow to convert PNG to WebP in 5 steps
The whole process takes under two minutes and requires no software installation or account. Your original PNG file is never modified.
Upload your PNG file
Drag your .png file onto the converter above, or click “Browse files” to select it from your device. Files are processed locally in your browser whenever possible — nothing is uploaded to a server.
Confirm the output format is WebP
The converter defaults to PNG → WebP on this page. If you dropped in a different file type, set the target format to WebP (.webp) using the format menu.
Adjust quality settings
Choose your quality settings. For photos, quality 90 is visually indistinguishable from the original; graphics with text or transparency should use the lossless option when available.
Convert the file
Click “Convert”. JoltFile processes the file and shows a progress indicator — most image conversions finish in a few seconds.
Download your WebP file
Save the converted .webp file to your device. The original PNG file is never modified, and temporary data is discarded automatically.
What happens to quality when converting PNG to WebP?
In lossless mode, WebP reproduces your PNG pixel-for-pixel at roughly 26% smaller size (per Google's published benchmarks). In lossy mode at quality 90+, savings reach 50–70% with differences invisible to the eye. Transparency is preserved in both modes — unlike JPG.
When should you convert PNG to WebP?
- Speeding up a website by replacing heavy PNG assets
- Keeping transparency while cutting file size for web graphics
- Improving Core Web Vitals (LCP) on image-heavy pages
- Reducing bandwidth costs for apps serving many images
PNG vs WebP: format comparison
| Property | PNG | WebP |
|---|---|---|
| File extension | .png | .webp |
| Full name | Portable Network Graphics | Web Picture format |
| Compression | Lossless (DEFLATE) | Lossy or lossless |
| Transparency | Supported | Supported |
| MIME type | image/png | image/webp |
| Introduced | 1996, by PNG Development Group | 2010, by Google |
| Best for | Screenshots, logos, icons, UI graphics, and any image needing transparency | Web images where page speed and Core Web Vitals matter |
About the PNG and WebP formats
What is PNG? (Portable Network Graphics)
PNG is a lossless raster image format created in 1996 as a patent-free replacement for GIF. It supports full alpha transparency and compresses without discarding any pixel data, which makes it the default choice for screenshots, UI assets, logos, and graphics with sharp edges or text.
Strengths
- Lossless compression — pixels survive every save
- Full alpha-channel transparency
- Universal support in browsers, editors, and operating systems
- Ideal for text, line art, and screenshots
Limitations
- Files are much larger than JPEG or WebP for photographs
- No native animation support (APNG exists but is a separate spec)
- No embedded color-management or metadata richness compared to TIFF
What is WebP? (Web Picture format)
WebP is a modern image format developed by Google in 2010 that supports both lossy and lossless compression, transparency, and animation in a single container. Google reports WebP lossy files are typically 25–34% smaller than comparable JPEGs, and lossless files about 26% smaller than PNGs.
Strengths
- 25–34% smaller than JPEG at equivalent quality (per Google)
- Supports transparency AND animation in one format
- Supported by all modern browsers since ~2020
- Both lossy and lossless modes
Limitations
- Older software (legacy editors, some CMSs) may not open it
- Not accepted by every print or desktop publishing workflow
- Encoding is slower than JPEG
PNG to WebP conversion: your questions answered
Does WebP keep the PNG's transparent background?
Yes. WebP has a full alpha channel in both lossy and lossless modes, so transparent PNGs convert cleanly — a key advantage over converting to JPG.
Will WebP work in all browsers?
Yes, effectively. WebP has been supported in Chrome, Edge, Firefox, and Safari (14.1+, 2021) for years, covering well over 95% of global users. Only very old software lacks support.
Lossless or lossy WebP — which should I pick?
Pick lossless for logos, UI assets, and anything with text. Pick lossy (quality 85–95) for photos and large illustrations where the extra savings matter.
Is it free to convert PNG to WebP with JoltFile?
Yes. JoltFile's free tier covers everyday PNG to WebP conversions with no account and no watermarks. Higher file-size limits and batch processing are planned for the upcoming Pro tier.
Is my PNG file private when I convert it?
Yes. JoltFile is designed around browser-based processing: whenever technically possible your file is converted locally on your own device and never uploaded to a server. Files that do require server processing are encrypted in transit and deleted automatically after conversion.
FAQ provided by JoltFile.