HD Image & Upscaler Tool
Enlarge low-resolution images with high-fidelity stepped bicubic resampling and unsharp mask edge enhancement.
How to Use This Tool
Select your low-resolution JPG, PNG, or WEBP photos into the queue.
Choose target scale factor and adjust unsharp mask and contrast levels.
Drag divider to inspect details, then download individual images or full ZIP.
Frequently Asked Questions
Stepped scaling resamples images through intermediate canvas buffers calculating smoother gradients and preserving core shape contours.
Unsharp masking detects soft regions, isolates edge transitions, and boosts local high-frequency contrast without introducing halo artifacts.
Nearest Neighbor preserves sharp pixel blocks without blending, ideal for retro pixel art and QR codes. Stepped Bicubic suits photos.
Yes. All image decoding, resampling, convolution matrix execution, and zip compression occur entirely inside your browser.
Processing Image...
Applying upscaling algorithms...