QuickToolkit
QuickToolkitPremium Free Tools
Image Tool

Free Image Resizer Online

Resize JPG, PNG, WebP, and GIF images to any pixel dimensions, by percentage, or to popular social media presets. Fast, private, and 100% free — everything runs in your browser.

Drag & drop your image here

or click to browse — JPG, PNG, WebP, GIF supported

Choose Image

Resize Images Online — Free & Instant

Need to resize an image for Instagram, a website, print, or email? Our free online image resizer lets you change photo dimensions in seconds — no account, no watermark, no server upload needed. Upload your image, pick your target size (exact pixels, a percentage, or a platform preset), and download your resized file instantly. Everything runs entirely in your browser using the browser canvas API, so your images are 100% private and never leave your device. It supports JPG, PNG, WebP, and GIF, and lets you choose your output format and quality so you get exactly the file you need.

How to Resize an Image in 4 Steps

  1. 1

    Upload your image

    Drag your image directly onto the upload area, or click to browse your files. JPG, PNG, WebP, GIF, BMP, and AVIF all work.

  2. 2

    Choose how to resize

    Switch between three modes: enter exact pixel dimensions, scale by a percentage (e.g. 50% to halve both sides), or tap a platform preset — Instagram, YouTube thumbnail, Facebook cover, and more.

  3. 3

    Set output format and quality

    Keep the original format or convert on the fly to JPEG, PNG, or WebP. Drag the quality slider to balance file size and visual clarity — 80–90 % is the sweet spot for JPEG.

  4. 4

    Download and compare

    Click Resize Image, then download. The before/after panel shows original vs resized dimensions and file size, including how much smaller (or larger) the output is.

Why Use This Image Resizer?

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100 % Private

All processing happens in your browser. Your images never touch a server.

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Three resize modes

Exact pixels, percentage scale, or social media presets — whatever fits your workflow.

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Platform presets built-in

Instagram, Facebook, Twitter, LinkedIn, YouTube, Pinterest and more — correct dimensions in one click.

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Format converter

Resize and convert in one pass — save as JPG, PNG, or WebP from any source format.

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Quality slider

Fine-tune JPEG/WebP compression to balance visual quality against file size.

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Aspect ratio lock

Change width and height will auto-calculate the other side, preventing distortion.

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Before / After preview

See both images side-by-side along with exact dimensions and file size comparison.

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No signup, no limit

Resize unlimited images for free — no account, no daily cap, no watermark ever.

Common Image Sizes — Quick Reference

Instagram

  • Post (square): 1080 × 1080 px
  • Landscape post: 1080 × 566 px
  • Portrait post: 1080 × 1350 px
  • Story / Reel: 1080 × 1920 px

Facebook / LinkedIn

  • FB Cover: 820 × 312 px
  • FB Post: 1200 × 630 px
  • LinkedIn Banner: 1584 × 396 px
  • LinkedIn Post: 1200 × 627 px

Twitter / YouTube

  • Twitter Header: 1500 × 500 px
  • Twitter Post: 1200 × 675 px
  • YouTube Thumb: 1280 × 720 px
  • YT Channel Art: 2560 × 1440 px

Web & Display

  • HD (720p): 1280 × 720 px
  • Full HD: 1920 × 1080 px
  • 2K / QHD: 2560 × 1440 px
  • 4K / UHD: 3840 × 2160 px

Print (300 dpi)

  • A4 Portrait: 2480 × 3508 px
  • A4 Landscape: 3508 × 2480 px
  • US Letter: 2550 × 3300 px
  • Business Card: 1050 × 600 px

Common Thumbnails

  • Small: 150 × 150 px
  • Medium: 300 × 300 px
  • Large: 600 × 600 px
  • Pinterest Pin: 1000 × 1500 px

When Should You Resize an Image?

  • ▸

    Website performance: Oversized images are the single biggest cause of slow page loads. Resizing a 4000 px wide photo to 800 px can cut file size by 80 % or more, directly improving Core Web Vitals and SEO.

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    Social media posts: Each platform has a recommended pixel size. Uploading the wrong dimensions causes cropping, letterboxing, or quality loss. Use our presets to get it right every time.

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    Email attachments: Many email providers reject attachments over 10–25 MB. Resizing a full-resolution photo to 1200 px wide usually brings it under 1 MB without visible quality loss.

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    E-commerce product images: Shopify, WooCommerce, and similar platforms recommend 2048 × 2048 px. Resize your product shots to meet spec without distorting them.

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    App icon exports: Mobile apps need icons at specific sizes (e.g. 1024 × 1024 px for App Store review, then scaled down automatically). Start with the largest and resize down.

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    Print and design: Ensure your images have enough pixels for the print size at 300 dpi before sending to a print service.

Frequently Asked Questions

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