IMAGE-TOOLS

Image Resizer: Full Scale & Crop Resize in Your Browser

Resize images freely in your browser. Scale the entire image up or down, or crop a specific area and resize it to any dimension you need. All processing happens instantly client-side.

Two Resize Modes

Choose the mode that fits your needs:

  • Full Resize: Scale the entire image to any width × height. Supports aspect ratio lock/unlock, percentage input, and quick presets.
  • Crop Resize: Drag to select any area of the image, then resize that crop to your desired output dimensions. Includes 1:1, 4:3, 16:9 and more aspect ratio presets.

Image Resizer

Drag & drop or click to upload your image below. Supports PNG, JPEG, WebP and all common formats up to 50MB.

Output Format Guide

  • PNG: Lossless quality with transparency support. Recommended for most uses.
  • WebP: Smaller file size with excellent quality. Ideal for web optimization.
  • JPEG: Best for photos. Adjustable quality. No transparency support.

Usage Tips

  • SNS profile picture: Crop to 1:1 ratio, resize to 400×400px
  • Blog thumbnail: Crop to 16:9 ratio, resize to 1200×675px
  • Email signature: Use full resize mode with aspect ratio locked
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Fit System

A developer with 10+ years of software engineering experience, specializing in high-performance system design and cloud-native architecture.