Convert PNG to WebP Online — Keep Transparency, Lose Bloat

Yes, 100%. WebP fully supports alpha channels (transparency), and our converter preserves them by default. Your transparent logos, icons, and graphics will maintain their transparency perfectly in WebP format.

PNG's alpha channel is its killer feature, and WebP matches it while delivering 30-50% smaller file sizes. You get the best of both worlds: transparency + smaller files.

WebP is the modern successor to PNG for web delivery. At equivalent visual quality, WebP achieves 30-50% smaller file sizes compared to PNG, resulting in:

• Faster page loads — Reduced bandwidth usage means faster Time to First Byte (TTFB) and better Core Web Vitals
• Lower hosting costs — Serve 30-50% less data per image, reducing CDN/egress bills
• Improved mobile experience — Smaller files load faster on cellular connections
• Better SEO — Google rewards fast-loading pages with higher rankings

With 93% browser support (Chrome, Firefox, Safari, Edge), WebP is production-ready for modern web apps. Keep PNG originals for archival or design work, but serve WebP to end users. Want even smaller files for modern browsers? Try our PNG to AVIF converter for 40-60% reduction.

Lossless—we preserve perfect quality. PNG is a lossless format, so we use lossless WebP to maintain that quality:

• No quality loss: Every pixel is preserved exactly as in your original PNG
• Still smaller: Lossless WebP is typically 20-30% smaller than PNG
• Full transparency: Alpha channel preserved with all 256 levels

Convert.FAST is optimized for quality. For maximum compression, our upcoming Compress.FAST service will offer best-in-class lossy optimization with imperceptible quality loss.

Yes, our REST API supports programmatic conversions for all paid plans. API access includes:

• Multipart/form-data upload endpoint
• Server-Sent Events (SSE) for real-time progress updates
• Batch processing with concurrent job limits
• Authenticated requests with OAuth 2.0 / OpenID Connect

Contact us for API documentation and credentials.

Choose based on your source format and transparency needs:

• PNG → WebP — Best for logos, icons, graphics, screenshots, or any image with transparency. Achieves 30-50% size reduction while preserving alpha channels.
• JPG → WebP — Best for photographs or images without transparency. Achieves 25-35% size reduction with lossy compression optimized for photos.

Both output WebP files ideal for modern web delivery. The key difference is whether your source has transparency (use PNG → WebP) or not (use JPG → WebP).

Yes. WordPress has supported WebP natively since version 5.8 (July 2021). You can upload, manage, and serve WebP images just like PNG without any plugins.

• Native support: WordPress 5.8+ handles WebP uploads, resizing, and thumbnail generation
• Older WordPress: Plugins like ShortPixel, Imagify, or EWWW can add WebP support
• CDN integration: Cloudflare, Fastly, and most modern CDNs can auto-convert to WebP based on browser support

For best results, keep original PNGs as source files and let your CMS or CDN serve WebP to compatible browsers automatically.

No, not reliably. Most email clients do not support WebP:

• Outlook: No WebP support (desktop and web versions)
• Gmail (web): No WebP support in email body
• Apple Mail: No WebP support
• Yahoo Mail: No WebP support

Recommendation: Always use PNG (for transparency) or JPEG (for photos) in email images. Keep your original PNGs for email campaigns.

For web delivery, use WebP. WebP with transparency is typically 30-50% smaller than PNG:

• WebP advantages: Smaller files, faster page loads, identical visual quality, full alpha channel support
• PNG advantages: Universal compatibility (email, legacy systems, design software), lossless editing, pixel-perfect archiving

Best practice: Keep PNG originals for source files and editing workflows. Convert to WebP for web delivery where the 30-50% size savings improve page speed.