File upload validation
Check whether your upload form accepts the .webp extension.
WEBP generator
or choose a popular size below ↓
Sample WebP Images at Any Size
Generate sample WebP images in custom dimensions from 1×1 to 5000×5000 px, choose a background colour, and download test files to check browser compatibility, validate image uploads, verify file formats, and test image-processing workflows.
Generate WebP Image
About the WebP Format
test webp
Popular WebP Image Sizes
Choose a common dimension for your testing requirements.
1200×630
Social sharing previews and content cards
1920×1080
Full-width website layouts and large image sections
512×512
Application icons and square image components
You can also enter custom dimensions from 1×1 to 5000×5000 pixels to test specific image requirements.
WebP Technical Details
| Property | Details |
|---|---|
| MIME type | image/webp |
| File extension | .webp |
| File signature | RIFF (52 49 46 46), followed by WEBP at byte 8 |
| Encoding | Lossy VP8 for the generated files |
| Transparency | Supported by the WebP format |
| Generated image background | Solid colour; no alpha channel in current output |
| Maximum dimensions | 5000×5000 pixels |
WebP supports both lossy and lossless compression. It can also support alpha transparency in both modes, although the images generated here currently use solid backgrounds without an alpha channel.
What to Test With WebP Files
Use sample WebP images to check how your application handles modern image formats.
MIME type detection
Verify that your backend recognises image/webp.
Image dimensions
Test minimum and maximum width and height restrictions.
Thumbnail generation
Confirm that previews and resized images retain the expected dimensions.
Image conversion
Test conversion from WebP to JPEG or PNG and verify the output.
CMS compatibility
Check whether your content management system uploads, stores, and displays WebP images correctly.
These tests can help identify unsupported formats, incorrect MIME mappings, and image-processing issues before deployment.
Popular WEBP sizes
Jump straight to a ready-made size
Frequently Asked Questions
Yes. The WebP format supports alpha transparency in both lossy and lossless modes. However, the sample images generated here currently use solid backgrounds without transparency.
Current versions of Chrome, Edge, Firefox, and Safari support WebP. Test older browsers and native applications separately if your project needs to support them.
Your application may reject WebP because its allowed file-type list does not include .webp, its MIME mapping does not recognise image/webp, or its server-side image library lacks WebP support.
Yes. The generated images are free to use commercially, with no attribution required.
Download Your Sample WebP Image
Choose your image dimensions and background colour to generate a WebP test image for your next development task. Use it to check upload validation, browser compatibility, image resizing, and file processing.
Download WebP Image