Image Resizer
Resize images locally — no server upload, your files stay private.
Advanced — Fit · High quality · 90% · No sharpen
What is Image Resizer?
An image resizer changes image dimensions (width and height) in pixels. Whether you need to prepare photos for social media, optimize thumbnails for a website, or create consistent product images for an e-commerce store, resizing ensures your visuals look sharp and load quickly. ToolCrux processes everything client-side in your browser—your images never leave your device. No uploads, no signup, complete privacy.
Real-world use cases include creating Open Graph images (1200×630) for link previews, resizing screenshots for documentation, preparing images for email newsletters, and adapting photos for different screen densities. Supports JPEG, PNG, and WebP—choose the format that best balances quality and file size for your use case.
How to Use Image Resizer
- Click the dropzone or drag and drop an image. Width and height auto-fill from the original.
- Enter custom dimensions or click a social preset (OG Image, X/Twitter, YouTube, Instagram, Story, FB Cover).
- Toggle Lock aspect ratio to maintain proportions, or unlock for exact dimensions.
- Select output format:
JPEG(photos),PNG(transparency), orWebP(best compression). - Open Advanced to choose resize mode (Fit, Fill, Cover), interpolation quality, and sharpen.
- Click Resize, then Download to save the resized image.
Tips & Best Practices
Use Fit when you need the full image visible with padding—ideal for product shots on white backgrounds. Use Cover for hero images or banners where cropping is acceptable; set the focal point (center, top, left) to control what stays visible. For pixel art or crisp logos, choose Crisp edges interpolation in Advanced. Press Ctrl+Enter to resize and Escape to clear. If you need smaller file size without changing dimensions, use our image compressor.
When to Use This Tool
Use the Image Resizer when preparing social media graphics, website thumbnails, email attachments, or any content that requires exact pixel dimensions. Pair it with our image compressor for maximum optimization, or our favicon generator when creating site icons. All ToolCrux image tools run client-side—your files stay private.
Frequently Asked Questions
What is an image resizer?
An image resizer changes image dimensions (width and height) in pixels. ToolCrux resizes images entirely in your browser — client-side processing means no upload to any server, so your images stay private.
Are my images uploaded to a server?
No. All resizing happens client-side in your browser. Your images are never sent to any server.
What is the difference between fit, fill, and cover?
Fill stretches the image to exact dimensions regardless of aspect ratio. Fit scales the image to fit within the target box while maintaining aspect ratio, padding the remainder with a background colour. Cover scales the image to fill the target box while maintaining aspect ratio, cropping overflow based on the focal point.
What are the social image presets?
Presets auto-fill the width and height for OG Image (1200×630), X/Twitter (1200×675), YouTube (1280×720), Instagram square (1080×1080), Instagram Story (1080×1920), and Facebook Cover (820×312).
What output formats are available?
JPEG, PNG, and WebP. JPEG is smaller for photos; PNG supports transparency; WebP offers excellent compression with quality control. Try our image compressor to reduce file size without changing dimensions.
Is the image resizer free?
Yes. The ToolCrux image resizer is free, runs entirely in your browser, and requires no signup. No server uploads, no tracking — complete privacy.