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Resize Image Online
Change image dimensions to exact pixels. Lock aspect ratio to avoid stretching. Download as JPG, PNG, or WebP — free and private.
Drop your image here
JPG, PNG, WebP, GIF supported
Choose ImageWhen to Resize an Image
Different platforms require different image sizes. Here are the most common requirements:
WhatsApp Profile
500 × 500px
Facebook Cover
820 × 312px
Instagram Post
1080 × 1080px
Twitter Header
1500 × 500px
YouTube Thumbnail
1280 × 720px
LinkedIn Profile
400 × 400px
Website Banner
1920 × 600px
Email Signature
300 × 100px
Frequently Asked Questions
What does locking the aspect ratio mean?
When the lock icon is active, changing the width automatically adjusts the height proportionally (and vice versa) to prevent the image from looking stretched or squished.
Will resizing reduce image quality?
Scaling down loses some pixel data but looks fine for most uses. Scaling up (enlarging) can look blurry because there is no new pixel data to add.
What format should I choose?
JPG is best for photos (smaller file). PNG is best for logos and graphics with transparency. WebP is best for websites — it is smaller than both JPG and PNG.
Complete Guide: Resizing Images Like a Pro
Whether you need a perfect square for an Instagram profile picture or a wide rectangular banner for your website header, achieving the exact pixel dimensions is crucial. Uploading an incorrectly sized image will trigger automatic cropping on most platforms, often cutting off important text or faces. Follow these steps to get the perfect dimensions without any blurriness.
Step 1: Managing the Aspect Ratio Lock
By default, the Lock Proportions (🔒) toggle is enabled. This is the most important feature of the tool. If you type "500" into the Width box, the Height box will automatically adjust itself so your photo doesn't look stretched or squished. If you strictly need an exact width and height (like 500x500) but your original photo is a rectangle, you must unlock the proportions—but be warned, this will physically stretch the image data to fit the box.
Step 2: Choosing Format
Before clicking download, choose the correct format. If you are resizing a standard photograph (like a portrait or landscape), select JPG to keep the file size incredibly small. If you are resizing a graphic design or logo that has a transparent background, you must select PNG. If you choose JPG for a transparent logo, the background will turn completely white.
Step 3: Scaling Down vs Up
This tool is designed to shrink images down to smaller pixel dimensions for web uploads. While you technically can enter a larger width to "enlarge" a tiny photo, doing so will stretch the existing pixels and make the final image look blurry and pixelated. Always aim to resize downwards from your largest original file.
Practical Resizing Use Cases
- Fixing "Image is too large" Errors: Some portals reject images wider than 2000px regardless of file size. Simply set the width to 1200px (leaving proportions locked) and the resulting image will be universally accepted while remaining perfectly sharp.
- Passport & Visa Photos: Portals frequently ask for exactly 600x600 pixels (US Visa) or 3.5x4.5cm. If your photo isn't a perfect square, you must crop it first before resizing to these exact bounds. Unlocking proportions and forcing 600x600 on a rectangular photo will make your face look distorted.
- Faster Page Load Times: If you are a web developer, never use a 4000px original DSLR photo for a blog thumbnail that displays at 400px. Resize the image down to exactly 400px wide. Your webpage will load significantly faster and score better on Google Core Web Vitals.
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