Image Resizer

Image Resizer and Upscaler

Resize Images to standard power-of-two resolutions. Single images, batch resizing, and full PBR texture set support. Multiple interpolation modes, live preview, client-side processing.

Drop any image here or browse
All image formats, any resolution
1024 px
64 px
128 px
256 px
512 px
1024 px
2048 px
4096 px
8192 px
1024 px
64 px
128 px
256 px
512 px
1024 px
2048 px
4096 px
8192 px
Bilinear (Smooth)
Nearest Neighbor (Pixelated)
Bilinear (Smooth)
Bicubic (High Quality)

Preview

Why Resize Images?

Power-of-Two Sizing

Game engines require power-of-two dimensions for mipmap generation and GPU optimization. Standard sizes: 64, 128, 256, 512, 1024, 2048, 4096.

VRAM Optimization

Downscaling oversized textures drastically reduces GPU memory. A 4K texture uses 4x the VRAM of a 2K texture. Useful for LOD pipelines and mobile optimization.

Multiple Interpolation Modes

Nearest Neighbor for pixel art, Bilinear for general scaling, Bicubic for highest-quality upscaling of photographs and detailed PBR maps.

Batch and PBR Set Resizing

Resize multiple images at once or resize entire PBR texture sets (albedo, roughness, metallic, normal, AO, height) to the same target resolution.

100% Client-Side

All resizing happens in your browser. Your image files are never uploaded to any server, ensuring complete privacy and security.

Aspect Ratio Control

Maintain aspect ratio to avoid stretching, or set independent width and height for exact output dimensions. Full control over final texture resolution.

Related Texture Tools

Combine the Image Resizer with our other free tools for a complete asset preparation workflow.

Seamless Texture Maker
Make any image tileable with live edge-blending and tiled preview.
Texture Channel Mixer
Pack grayscale maps into RGBA channels for game engines.
Normal from Height
Convert height maps into normal maps for 3D materials.
Noise Generator
Procedural Perlin, Voronoi and Worley textures.
Image to PBR
Generate full PBR material maps from a single image.
FAQ

Frequently Asked Questions

Use 512x512 or 1024x1024 for most objects, 2048x2048 for hero assets and characters, and 4096x4096 for detailed environment textures. Always use power-of-two dimensions (64, 128, 256, 512, 1024, 2048, 4096) for GPU compatibility and proper mipmap generation in Unity, Unreal Engine, and Godot.
Bilinear (Smooth) is the best all-round choice, balancing quality and speed. Bicubic (High Quality) produces the sharpest upscaling for photographs and detailed PBR maps like albedo. Nearest Neighbor (Pixelated) preserves hard edges and is ideal for pixel art, stylized textures, and non-color data maps like masks where crisp edges matter.
Yes. Switch to the PBR Sets tab, then upload your albedo, roughness, metallic, normal, AO, and height maps individually or bulk drop them for auto-detection. All maps are resized to the same target resolution with the same interpolation settings, ensuring all PBR channels stay perfectly aligned.
We recommend power-of-two resolutions for maximum compatibility. Most game engines warn about or reject non-POT textures for mipmap generation. The preset options are all standard POT sizes to keep your assets engine-ready.
Downscaling (reducing resolution) preserves quality very well. Upscaling with Bilinear or Bicubic interpolation produces smooth results but cannot create detail that was not in the original image. For significant upscales (2x or more), consider using an AI-based super-resolution tool for best results.
No. All resizing happens entirely in your browser using the HTML5 Canvas API. Your images never leave your computer, ensuring complete privacy. The only exception is server-side export formats (TIFF, BMP, AVIF, EXR), where the already-resized image is sent for format conversion only.
Yes. The canvas rendering pipeline preserves alpha/transparency in the output. PNG and WebP exports maintain the alpha channel. JPEG exports (since JPEG does not support alpha) are composited against a white background.