AmberPic

Image Resizer

Image Resizer by AmberPic processes your images directly in your browser. Resize images by pixels, percentage, or preset dimensions. Lock aspect ratio. No upload, no signup, instant results. Works with every modern format and produces output optimized for web, email, or social media.

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Drop images here or click to upload

JPG, PNG, WebP, AVIF — Up to 100 files · Or paste with Ctrl+V

Features

  • ✓ Resize by pixels, percentage, or preset dimensions
  • ✓ Lock aspect ratio to prevent distortion
  • ✓ Multiple output sizes at once
  • ✓ Batch process up to 100 images
  • ✓ No quality loss with high-quality resampling

How to use

  1. 1
    Upload your images Drag and drop or browse for images. Supports JPG, PNG, WebP, AVIF, HEIC.
  2. 2
    Choose resize method Enter specific width/height, pick a percentage, or select a preset (Instagram square, Facebook cover, etc.).
  3. 3
    Lock aspect ratio (optional) Toggle the lock icon to maintain proportions. Unlock to stretch or crop freely.
  4. 4
    Download resized images Get your images at the new dimensions.

Common use cases

  • → Resize photos for email attachments
  • → Optimize images for web (smaller dimensions = faster load)
  • → Prepare images for social media at correct sizes
  • → Reduce image dimensions for mobile apps

Frequently asked questions

How do I resize an image without losing quality?

Resizing down (making smaller) usually preserves quality with good algorithms. Resizing up (making larger) can introduce blur. Our tool uses high-quality resampling to minimize artifacts.

What does locking aspect ratio do?

When locked, the image maintains its original proportions. If you change the width, the height adjusts automatically. When unlocked, you can set width and height independently (which may distort the image).

Can I resize multiple images at once?

Yes. Upload up to 100 images and resize them all to the same dimensions. Download as a ZIP.

Related tools

Bulk Resizer

Resize multiple images to the same dimensions and download as ZIP.

Image Cropper

Interactive cropper with zoom, rotate, and free-form selection.

Social Media Crop

Crop images to exact dimensions for Instagram, Facebook, Twitter, LinkedIn, YouTube, Pinterest, TikTok.

Aspect Ratio Calculator

Calculate and crop to any aspect ratio: 1:1, 4:3, 16:9, 3:2, 21:9, or custom.

Privacy guaranteed

  • ✓ Zero uploads — your files never leave your device
  • ✓ No signup, no watermark, no limits
  • ✓ Works offline once loaded