PNG to WebP — Lighter Images With Transparency Kept
Convert PNG to WebP to significantly reduce file sizes while preserving transparency. Great for improving website load performance.
Drop PNG files here or click to select
.png (multiple files)
Settings
Files
Converting...
Preparing...
Format comparison
PNG (Portable Network Graphics) uses lossless compression and supports transparency. Ideal for logos and screenshots.
Pros
- ✓ Lossless compression
- ✓ Alpha transparency
- ✓ Great for sharp edges
Cons
- ✗ Larger file sizes
- ✗ Inefficient for photos
WebP is a web-focused image format that often achieves smaller files while keeping good visual quality.
Pros
- ✓ Often smaller for web delivery
- ✓ Transparency support (useful for UI assets)
- ✓ Broad browser support
Cons
- ✗ Some older browsers unsupported
- ✗ Limited editing software support
When to Convert PNG to WebP
Use this to optimize PNGs for the web. WebP can keep transparency while often reducing file size.
Technical Format Details
PNG Technical Specifications
Technical details
PNG is a lossless raster format that preserves pixel data exactly. It supports alpha transparency, which makes it a common choice for logos and UI assets.
Good for
- Logos/icons: Assets that need transparency- Screenshots: Crisp text and line art
Notes
- Photos: Files can be large (WebP/JPEG may be a better fit)- Quality setting: Since PNG is lossless, “quality” controls may have little or no effect
Reference: W3C: PNG 3rd Edition
WebP Technical Specifications
Technical details
WebP is a web-focused image format that supports both lossy and lossless modes, and it can store transparency.
Good for
- Web delivery: Balancing file size and visual quality- Transparent assets: Often lighter than PNG in many cases
Notes
- Editing: Support varies across software- Compatibility: Some older environments may not support WebP
Reference: Google Developers: WebP
How to Use
Add files
Drop or click to select your PNG files (multiple supported)
Confirm output
Default is WebP. You can change to another supported output format if needed.
Adjust options
Set quality, resize, and metadata options only if you need them.
Convert & download
Download each file, or download everything as a ZIP for batch outputs.
FAQ
Is transparency preserved when converting PNG to WebP?
Yes. WebP supports alpha transparency, so PNG transparency data is fully preserved in the conversion.
How much smaller will files be?
Typically 30–70% smaller than PNG, depending on image content. The savings are largest for photographic images.
Can I use WebP lossless mode?
Setting quality to 100 uses lossless mode. Even then, WebP files are often smaller than the original PNG.
Will converting reduce image quality?
It depends on the output format. PNG is lossless, so quality stays the same. Lossy formats like JPEG/WebP/AVIF/JXL can change file size and appearance depending on the quality setting. Always verify with the final output before publishing.
Can I keep Exif metadata?
When "Keep Exif/Metadata" is ON, we try to carry over things like capture time, camera info, and GPS where possible. Some tags may be dropped depending on the input, output format, and browser environment. Turn it OFF if you want to remove location data before sharing.
Can I convert multiple files at once?
Yes. You can select multiple files, convert them in one run, and download each file individually. For multiple outputs, you can also download everything as a ZIP. For very large batches, splitting into smaller runs is more stable.
Are my images uploaded to a server?
No. Conversion runs locally in your browser, and your images are not sent to an external server.
What if conversion fails or is slow?
Some formats (like HEIC/HEIF) depend on browser support. If it fails, try another browser, reduce the number of files, or resize before converting.
References
- W3C: PNG 3rd Edition
Official PNG/APNG specification reference.
- AOM: AVIF Specification
Normative AVIF container and coding behavior.
- JPEG Committee
Primary standards source for JPEG and JPEG XL.
- Google Developers: WebP
Reference for WebP encoding and support behavior.
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