Free Image Resizer Online — Resize Image to Any Size

📐 Standard Image Sizes — Quick Reference

Different platforms require different image dimensions. Here is a complete reference for the most common image sizes used across social media, professional and government platforms in India:

Platform / Use	Width	Height	Ratio
WhatsApp DP	512px	512px	1:1
Instagram Post	1080px	1080px	1:1
Instagram Story	1080px	1920px	9:16
LinkedIn Profile	400px	400px	1:1
LinkedIn Cover	1584px	396px	4:1
YouTube Thumbnail	1280px	720px	16:9
Facebook Cover	1200px	628px	~1.91:1
Passport Photo (India)	413px	531px	35×45mm
Full HD Wallpaper	1920px	1080px	16:9
Twitter Header	1500px	500px	3:1

Resize Modes Explained

Fit Mode: The image is scaled to fit inside the target dimensions while preserving its original aspect ratio. Any empty space is filled with the background color you select. Use this for profile photos and social media where you want no cropping.
Crop Fill Mode: The image is scaled to completely fill the target dimensions, cropping any excess from the edges while maintaining aspect ratio. Use this for banners and covers where you want no empty space.
Stretch Mode: The image is stretched to exactly match the target width and height, ignoring the original aspect ratio. Use this only when exact pixel dimensions are required regardless of distortion.

JPEG vs PNG vs WebP — Which Format to Choose?

JPEG: Best for photographs and images with many colors. Smaller file size with slight quality reduction. Ideal for social media uploads and web use.
PNG: Best for images with text, sharp edges or transparent backgrounds. Lossless quality but larger file size. Ideal for logos, screenshots and documents.
WebP: Google's modern format — smaller file size than JPEG at similar quality. Supported by all modern browsers. Best choice for website images.

❓ Frequently Asked Questions

Is this image resizer completely free?

Yes — 100% free with no restrictions. No account, no watermarks, no daily limits and no hidden charges. Resize unlimited images in any format at any quality setting at zero cost permanently.

Will my images be uploaded to a server?

Never. ToolsAI Pro's Image Resizer processes everything using the HTML5 Canvas API running entirely in your browser. Your images are read into browser memory using the FileReader API and resized locally on your device — zero network activity occurs during the entire process.

How do I resize an image for WhatsApp DP?

Upload your photo, click the "WhatsApp DP" preset button (512×512), select "Fit" mode if you want no cropping, choose your background color, select JPEG format and click Resize Image. Download and set it as your WhatsApp profile photo directly.

Can I resize an image to a specific file size (KB)?

Yes — adjust the Quality slider to control the output file size. Lower quality means smaller file size. For example, for a 200KB limit, start at 92% quality and reduce until the file size shown meets your requirement. The output file size is shown in the preview panel after resizing.

Does the tool work on mobile phones?

Yes. Fully mobile-responsive and works on Android and iOS in Chrome and Safari. Upload photos directly from your phone gallery, resize them and download the result to your device — no app installation needed.