Image ToolEssential Client-Side Execution

Image Resizer

Change image dimensions accurately with custom width and height inputs or quick preset percentages. Maintain the original aspect ratio automatically to avoid distortion, and select your preferred output format.

Select an image to resize

Supports JPG, PNG, and WebP up to 30 MB

Key Features & Technical Advantages

Why professionals and everyday users trust DocuForge for file processing.

Resize by exact pixel dimensions or preset percentages (25%, 50%, 75%)
Aspect ratio lock prevents distortion and stretching
High-quality bicubic canvas resampling
Supports JPG, PNG, and WebP output
Original dimensions and new dimensions displayed side by side

How to Use Image Resizer

Follow these quick steps to process your files in seconds.

Choose an Image

Select an image from your computer or drag it into the resizer box.

Set Dimensions

Type in your target Width or Height in pixels, or click a quick percentage preset (e.g. 50%).

Lock Aspect Ratio

Keep "Maintain Aspect Ratio" checked so your image scales proportionally without stretching.

Export File

Click "Resize & Download" to instantly save your resized image in your selected format.

Strict Privacy & Security Guarantee

When using the Image Resizer on DocuForge, your file data never leaves your computer or smartphone. All operations execute strictly within your local browser sandbox via modern WebAssembly and native Web APIs. We do not store, view, or transmit your documents to any cloud server.

Supported Input Formats: JPEG, PNG, WEBP • Maximum Recommended File Size: 30 MB.

Image Resizer — Frequently Asked Questions

Clear answers about browser processing, performance, security, and privacy.

Can I make a small image larger without losing quality?

You can increase pixel dimensions, but upscaling a raster image beyond its native resolution will naturally soften fine details. For best clarity, downscaling or resizing close to the native size is recommended.

Does resizing strip transparency in PNG images?

Practical background and best practices for getting the most from this tool.

How to Compress Images Without Losing Visible Quality

Learn the difference between lossy and lossless compression, optimal quality thresholds for JPG and WebP, and how to reduce file sizes by 70% while keeping visuals sharp.

Read the guide