ConvertDuck

Image Resizer

Resize multiple images individually or use batch processing.

Drop PNG, JPG, WEBP files here.

No images selected.
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💡 Select mode and click 'Apply' to resize all images.

Resize Images Without Losing Quality

Whether you're optimizing photos for a website or preparing social media posts, our bulk image resizer gives you control. Unlike server-based tools, this processes images locally on your device, ensuring speed and privacy. Resize by percentage or exact pixels while maintaining aspect ratio.

How to Resize Images in Batch

1. Upload Images

Drag and drop multiple PNG, JPG, or WebP files. There's no limit on the number of files.

You can mix different formats in one batch.

2. Set Dimensions

Choose 'Scale' to reduce by percentage or 'Fixed' to set exact width/height in pixels. Use the lock icon to maintain aspect ratio.

Batch mode applies the same rule to all images instantly.

3. Download

Click 'Convert & Download'. Single files save directly, while multiple files are zipped automatically.

Why Use This Resizer?

  • ✓ Batch Processing

    Resize hundreds of images at once. Apply consistent scaling rules across all files instantly.

  • ✓ Private & Secure

    Everything happens in your browser using Canvas API. Your photos never leave your device.

  • ✓ Aspect Ratio Control

    Lock the width/height ratio to prevent distortion, or unlock to force specific dimensions.

Technical Details

Processing Local Canvas API (No Server Upload)
Formats JPG, PNG, WebP
Batch Support Yes (Unlimited files)
Download Direct file or ZIP archive

Browser vs. Server Resizing

Feature This Tool (Browser) Server-Based Tools
Privacy 100% Private Files uploaded to server
Speed Instant (No upload time) Slower (Depends on internet)
Limits Device Memory Only Often limited (e.g., 20 files)

Common Questions

Q. Does resizing reduce image quality? ▼
Reducing size (downscaling) generally maintains quality. Upscaling (making larger) may cause pixelation.
Q. How many images can I resize at once? ▼
There is no hard limit. It depends on your device's memory, but resizing 50-100 images is usually smooth.
Q. Is my data safe? ▼
Yes. Since we don't upload your files to any server, your photos remain completely private on your computer.
Q. Can I resize for Instagram/Facebook? ▼
Yes, use the 'Fixed' mode to set exact dimensions like 1080x1080px for Instagram posts.