Free · No Upload · Batch

Resize Image Online Free

Change image dimensions by pixel or percentage. Lock aspect ratio, batch resize multiple files. Everything runs in your browser — private and instant.

📐

Drop images here to resize

or click to browse · Multiple files supported

How to Resize Images Online

Upload your images, choose whether to resize by pixel dimensions or percentage, then click "Resize All". With aspect ratio lock enabled, just enter the width and the height will be calculated automatically to prevent distortion.

Percentage mode is great for quickly scaling down images — set to 50% to halve the dimensions, or 200% to double them.

Common Image Size Presets

Social media profile photos typically need 400×400px. HD wallpapers are 1920×1080px. Thumbnail images for blogs work well at 800×600px. Email signatures are usually 600px wide. Our tool lets you set any custom size you need.

Frequently Asked Questions

How do I resize an image without losing quality?▸
To minimize quality loss, avoid upscaling images beyond their original dimensions. When downscaling, use the aspect ratio lock to maintain proportions. Our tool processes everything client-side in your browser using the Canvas API for high-quality resampling.
What is aspect ratio lock?▸
Aspect ratio lock keeps the width-to-height proportion of your image fixed. When enabled, entering a new width automatically calculates the correct height to prevent distortion. All processing happens in your browser — your images stay private.
Can I resize by percentage instead of pixels?▸
Yes, switch to Percentage mode and use the slider to scale images from 1% to 200% of their original size. Set to 50% to halve dimensions or 200% to double them. Everything runs client-side for complete privacy.
What are the maximum dimensions I can resize to?▸
You can resize up to 10,000 x 10,000 pixels. However, very large dimensions may be slow on older devices since all processing happens locally in your browser. For most use cases, dimensions under 4000px work best.
Can I batch resize multiple images?▸
Yes, you can upload and resize multiple images at once. All files are processed with the same dimensions or percentage setting, then available for individual download or as a ZIP archive. Processing is entirely client-side and private.
📖 Read: Image Size Guide for Social Media 2026
Other Tools
⚡

Compress Image

Reduce file size up to 90%

 🔄

Convert Image

JPG, PNG, WebP conversion

 🖼️

Image to ICO

Create favicon ICO files

 ✂️

Crop Image

Precise crop with aspect ratios

 🔄

Rotate & Flip

Rotate, flip, custom angles

 💧

Add Watermark

Text & image watermarks

 📄

PDF to Images

Convert PDF pages to images

 📑

Images to PDF

Combine images into PDF

 📱

HEIC to JPG

Convert iPhone HEIC photos