How do I resize an image without losing quality?

Use high-quality bicubic interpolation (which our tool uses by default) and avoid upscaling images more than 2x their original size. For best results, resize down rather than up, and save as PNG for lossless quality.

What are the correct image sizes for social media?

Instagram Post: 1080×1080px, Instagram Story: 1080×1920px, Facebook Cover: 820×312px, Facebook Post: 1200×630px, Twitter Header: 1500×500px, YouTube Thumbnail: 1280×720px, LinkedIn Banner: 1584×396px, Pinterest Pin: 1000×1500px.

Can I resize multiple images at once?

Our free tier supports one image at a time. Premium users can batch resize multiple images simultaneously. All processing still happens in your browser for maximum privacy.

What's the difference between resizing and compressing an image?

Resizing changes the pixel dimensions (width × height) of an image, while compressing reduces file size without changing dimensions. Both can reduce file size, but resizing physically changes the image size. Use our Image Compressor if you want to keep the same dimensions but reduce file size.

Is my image data safe when using this resizer?

Yes! All resizing happens entirely in your browser using the HTML5 Canvas API. Your images are never uploaded to any server. We have zero access to your files.

Resize Image Online Free

Resize images to exact pixel dimensions or social media presets. No upload — runs 100% in your browser. Your images stay private.

Drag & drop an image to resize, or click to browse

Supports JPG, PNG, WebP, GIF

How to Resize an Image Online for Free

1Upload your image — Drag and drop or click to browse. Supports JPG, PNG, WebP, GIF, and more.
2Set your target dimensions — Enter exact pixel values or pick a social media preset (Instagram, Facebook, Twitter, YouTube, Pinterest, LinkedIn).
3Download your resized image — Get your result instantly. No watermarks, no sign-up required.

Why Resize Images Online?

Image resizing is one of the most common tasks for anyone working with digital media. Whether you're preparing images for a website, social media platform, or email campaign, having the right dimensions matters.

For websites: Properly sized images improve page load speed, which is a key Google ranking factor. An oversized 4000px image on a blog post wastes bandwidth and slows down your site.

For social media: Each platform has specific recommended dimensions. Using the wrong size results in cropping, stretching, or poor display. Our presets ensure your images look perfect on Instagram, Facebook, Twitter, YouTube, LinkedIn, and Pinterest.

For email: Most email clients have image size limits. Resizing your images before attaching keeps your emails fast and deliverable.

Social Media Image Size Guide 2025

Platform	Type	Dimensions
Instagram	Post	1080 × 1080px
Instagram	Story	1080 × 1920px
Facebook	Cover	820 × 312px
Facebook	Post	1200 × 630px
Twitter	Header	1500 × 500px
Twitter	Post	1200 × 675px
LinkedIn	Banner	1584 × 396px
YouTube	Thumbnail	1280 × 720px
Pinterest	Pin	1000 × 1500px
Twitch	Banner	1200 × 480px

Resize vs Compress vs Crop — What's the Difference?

📐 Resize

Changes the pixel dimensions (width × height). The entire image is preserved but scaled to new dimensions.

🗜️ Compress

Reduces file size without changing dimensions. Uses algorithm optimization to remove unnecessary data. Try it →

✂️ Crop

Removes parts of the image to focus on a specific area. Changes both dimensions and content. Try it →

You Might Also Need

Image Compressor

Reduce file size without changing dimensions

Format Converter

Convert JPG ↔ PNG ↔ WebP ↔ GIF

Image Cropper

Crop to exact proportions