Create JPG, PNG, WebP, GIF, BMP and TIFF test images, including animated GIF and WebP, with the exact size and resolution you need.
Generate test images in multiple formats with colorful patterns.
🔧 Size matching: the image is created at your resolution and padded to the exact size. If it's larger than the target, the resolution is lowered until it fits.
Compatible with all major browsers and image editors
Each image is a real file rendered in your browser: a colorful gradient by default, or broadcast-style color bars or a focus pattern from the advanced options. JPG and WebP are encoded by the browser (or by FFmpeg where a browser can't encode WebP); PNG, GIF, BMP and TIFF are written by FileMock's own encoders.
Animated GIF and WebP files have 10 frames shown for 0.1 seconds each, looping forever, with the pattern changing from frame to frame.
If the encoded image is smaller than the size you entered, padding is added after the image data so the file reaches the exact target size. Image viewers ignore it.
The image is created at the resolution and quality you choose whenever it fits the target size. If it's larger, FileMock first lowers the quality (JPG and WebP) and then the resolution until it fits; the final settings are shown after the download. Animated images are limited to 4,096 pixels on the longest side.
For JPG images you can add EXIF metadata in the advanced options: orientation, camera make and model, date and time, exposure time, aperture, ISO, focal length, artist, copyright and software. Use it to check that photos taken in portrait mode are displayed upright, and that metadata is removed from public copies when your privacy policy requires it.
Answers to common questions about generating test images.
