WebP is a modern image format developed by Google, based on the VP8 video codec. Its lossy compression outperforms JPEG by 25–35% at equivalent visual quality. Its lossless compression outperforms PNG by 26%. Unlike JPEG, WebP supports transparency. Unlike PNG for photos, WebP achieves much smaller file sizes. And unlike GIF, animated WebP supports full colour (not just 256 colours) with far better compression.
Free WebP Converter — Online
Convert To & From Google WebP Format
Convert JPG, PNG, and GIF to WebP for faster websites, or convert WebP back to JPG/PNG for universal compatibility. Improve Core Web Vitals in minutes.
25–35% smaller than JPEG
Supports transparency like PNG
Convert WebP back to JPG/PNG
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Up to 100 MB free • Outputs: WEBP, JPG, PNG
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SSL Encrypted
Files deleted in 2h
Fast processing
No signup needed
Simple & Fast
How to Use WebP Converter
Convert your files in three simple steps — no software, no signup.
01
Upload Your Image
Drop a JPG, PNG, GIF, or WebP file. Batch mode available for registered users.
02
Select Output Format
Choose WebP as output to optimise for web, or choose JPG/PNG to restore compatibility.
03
Download & Deploy
Replace your old images with WebP versions and immediately improve page load performance.
Features
Why Use WebP Converter?
Core Web Vitals Boost
WebP images load faster than JPEG, directly improving LCP (Largest Contentful Paint) — a key Google ranking signal.
25–35% Smaller Files
WebP achieves equivalent visual quality to JPEG at 25–35% smaller file sizes, saving bandwidth and CDN costs.
Transparency + Animation
Unlike JPEG, WebP supports alpha transparency (like PNG) and animation (like GIF) in a single format.
Two-Way Conversion
Convert TO WebP for web or FROM WebP to JPG/PNG when you need compatibility with older software.
Supported Everywhere
WebP is now supported in all modern browsers: Chrome, Firefox, Edge, Safari 14+, and all mobile browsers.
Private & Secure
Files deleted within 2 hours. No registration required for standard use.
Compatibility
Supported Formats
All the formats you need, all in one place.
| Format | Description | Extension | Best Used For |
|---|---|---|---|
| JPG → WEBP | Photo to WebP with quality control | .webp |
Replace JPEG images on websites |
| PNG → WEBP | Lossless or lossy WebP from PNG | .webp |
Transparent UI assets for web |
| GIF → WEBP | Animated WebP from GIF (smaller) | .webp |
Replace GIF animations on modern browsers |
| WEBP → JPG | Restore JPEG from WebP file | .jpg |
Sharing in email, old software |
| WEBP → PNG | Lossless restoration from WebP | .png |
Editing in Photoshop, GIMP |
| WEBP → GIF | Animated GIF from animated WebP | .gif |
Platform compatibility for animated images |
| WEBP LOSSLESS | Lossless WebP, larger but pixel-perfect | .webp |
Logos, diagrams, screenshots |
FAQ
Frequently Asked Questions
Yes, if your audience uses modern browsers. Use a element with WebP as the primary source and JPG as fallback. All major CMS platforms (WordPress, Shopify, Webflow) support this out of the box.
Both. WebP supports lossy compression (like JPEG, smaller files) and lossless compression (like PNG, perfect quality). Our tool defaults to lossy at quality 85 — change it in the options panel.
Yes — this is one of WebP's key advantages. Lossy WebP with an alpha channel produces files much smaller than equivalent PNGs while still supporting full transparency.
Yes. Animated WebP files are fully supported as input. We extract all frames and encode them as an animated GIF, though file size will typically increase compared to the WebP original.
Yes — Safari added WebP support in version 14 (September 2020), which covers iOS 14+ and macOS Big Sur+. Older Safari versions require a JPEG fallback.
Quality 80–85 is the recommended sweet spot for photos — visually indistinguishable from the original at 30% smaller file size. Use quality 90+ for portfolio or product photography.
Real-World Uses
Who Uses WebP Converter?
From everyday users to professionals — see how people rely on this tool every day.
Web Developer
Improve Core Web Vitals
Convert all JPEG and PNG images to WebP and cut page weight by 25–35%, directly improving LCP scores and Google search rankings.
Shopify Store Owner
Reduce Store Load Time
Switch product images to WebP format to reduce image payload, improve mobile performance, and lower CDN bandwidth costs at scale.
Designer
Recover WebP from Web Downloads
Downloaded a WebP image but your design software can not open it? Convert back to PNG or JPG for editing in Photoshop or GIMP.
Content Creator
Convert GIF to Animated WebP
Replace GIF animations with animated WebP files that are 50–80% smaller, for faster-loading social embeds and blog posts.
Mobile App Developer
Optimise In-App Image Assets
Bundle image assets as WebP in Android and Chrome OS apps to reduce APK size and improve load time on slow mobile data connections.
DevOps / CI Engineer
Automate WebP Conversion Pipeline
Integrate our API into your build or deployment workflow to automatically convert images to WebP on commit, before CDN upload.
Why TransmuteBox?
TransmuteBox vs. Alternatives
See how we compare to desktop software and other online converters.
| Feature |
Our Tool TransmuteBox |
Squoosh | Other Online |
|---|---|---|---|
| 25–35% smaller than JPEG | |||
| Alpha transparency support | Varies | ||
| Animation support | Partial | ||
| Two-way conversion | Varies | ||
| Lossless WebP mode | Varies | ||
| Files auto-deleted (2 h) | Browser only | Varies | |
| Free to use | Varies | ||
| API access | Pro |
Under the Hood
Technical Specifications
Built on industry-standard open-source tools for maximum quality and reliability.
Limits & Restrictions
- Max file size: 100 MB (free)
- Max output resolution: 16,383 × 16,383 px (WebP spec limit)
- Animated WebP: max 30 frames input/output
libwebp
WebP
Google
JPEG
PNG
GIF
lossless
Core Web Vitals
Conversion Engine
libwebp 1.3.x (Google's official WebP codec) + Pillow 10.x
Output Quality
Lossy: quality 1–100 (default 85); Lossless: bit-perfect encoding
Average Speed
Conversion in under 2 seconds for typical web images
Data Security
HTTPS transfer · isolated temp dir · auto-purged in 2 h
Compression gain
25–35% vs JPEG, 26% vs PNG
Alpha channel
Full 8-bit alpha transparency
Browser support
Chrome, Firefox, Edge, Safari 14+
Complete Guide
WebP: The Complete Guide to Google's Image Format
WebP is now the de-facto standard for web images. Understanding its strengths, limitations, and how to implement it correctly can dramatically improve your website's performance and user experience.
What Makes WebP Different from JPEG and PNG?
Lossy vs Lossless WebP
Lossy WebP uses predictive coding: it divides the image into blocks, predicts block content from neighbouring blocks, and encodes only the difference (residual). Higher quality settings encode residuals more accurately; lower settings discard more. Lossless WebP uses a palette coding, spatial prediction, and entropy coding chain — similar to PNG but more efficient. Use lossy for photographs and lossless for logos, UI elements, and anything with sharp edges.
WebP Transparency (Alpha Channel)
WebP supports an 8-bit alpha channel for both lossy and lossless modes. In lossy mode, the RGB channels are compressed with lossy encoding while the alpha channel is compressed losslessly — giving you a small transparent image. This is often dramatically smaller than an equivalent PNG: a 100×100 transparent logo might be 8 KB as PNG but only 2 KB as lossy WebP with alpha.
Implementing WebP with Fallbacks
The safest way to serve WebP is using the HTML <picture> element with a fallback: specify the WebP source first, then a JPEG/PNG fallback. Modern browsers (Chrome, Firefox, Edge, Safari 14+) will choose WebP; older browsers fall back to JPEG automatically. Most CDNs and image services (Cloudinary, Imgix, Cloudflare Images) can serve WebP automatically based on the Accept header, eliminating the need for manual fallbacks.
WebP in WordPress, Shopify, and Other CMS Platforms
WordPress 5.8+ supports WebP uploads natively. Shopify automatically converts uploaded images to WebP when served through their CDN. Webflow serves WebP automatically. For platforms that do not yet handle WebP, pre-convert your images using our tool before uploading — the result is the same optimised delivery with no plugin or CDN dependency required.