Free Image Enhancement – Upscale 4x Online | Fmthub
Enhance your images with Fmthub's super-resolution tool. Upscale up to 4x with Lanczos & Unsharp Masking. Free, private, runs in your browser. No sign-up. Try it now on Fmthub.
Professional Algorithms
Lanczos 3 interpolation and Unsharp Masking for sharper, higher-resolution results—no quality loss
Fast Processing
WebGL-accelerated enhancement; most images finish in seconds, entirely in your browser
Privacy Protected
All processing runs locally—your images never leave your device
Free Image Enhancement – Upscale 4x Online | Fmthub
Enhance your images with Fmthub's super-resolution tool. Upscale up to 4x with Lanczos & Unsharp Masking. Free, private, runs in your browser. No sign-up. Try it now on Fmthub.
Professional Super-Resolution Settings
🚀 Lanczos 3 + Unsharp Masking
Industry-standard interpolation, color-accurate, optional sharpening
Disable for best quality, larger file size
Select Enhancement Mode
Enhanced Adaptive USM + Color Protection
Enhanced Edge-Directed Interpolation + Multi-scale Sharpening
Enhanced Deblur + Readability Enhancement
Drag and drop images here, or click to select
Supports JPEG, PNG, WebP, BMP, TIFF
Need format conversion or PDF? Browse all free tools on Fmthub.
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