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.

Technical Details

ProcessingLocal Canvas API (No Server Upload)
FormatsJPG, PNG, WebP
Batch SupportYes (Unlimited files)
DownloadDirect file or ZIP archive

Browser vs. Server Resizing

FeatureThis Tool (Browser)Server-Based Tools
Privacy100% PrivateFiles uploaded to server
SpeedInstant (No upload time)Slower (Depends on internet)
LimitsDevice Memory OnlyOften 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.