OnlineImageTools.net

Resize & Crop Images Online

Instantly change image dimensions and crop focus areas for social media, print, or web. Use common presets or custom sizes.

Resize Images

Instantly resize for Instagram, YouTube, TikTok, and more. Batch processing supported.

Resize Images for Social Media & Web

Posting the wrong image size on social media can lead to awkward cropping or blurry, pixelated photos. Our Online Image Resizer makes it effortless to prepare your visuals for Instagram, Facebook, YouTube, TikTok, and more. Whether you need a square post or a vertical story, we have the presets ready.

Fit vs Fill — Which Resize Mode Should You Use?

Understanding the difference ensures your images look exactly how you want:

  • Fill (Cover): Scales the image to cover the entire target area. This is the best option for full-screen stories, but it may crop the edges of your photo.
  • Fit (Contain): Resizes the image to fit entirely within the box without cropping. Padding (colored bars) is added to fill empty space. Use this for logos or product shots.
  • Stretch: Forces the image to exact dimensions by distorting it. Use this only if you don't mind the image looking squashed.

Popular Social Media Image Sizes (2025)

We keep our presets updated with the latest requirements:

  • Instagram Post: 1080×1080 (Square) or 1080×1350 (Portrait)
  • Instagram Story / TikTok: 1080×1920 (Vertical)
  • YouTube Thumbnail: 1280×720 (Landscape)
  • Facebook Cover: 820×312
  • X (Twitter) Header: 1500×500

How to Resize and Crop an Image

  1. Upload: Drag and drop your image file onto the canvas.
  2. Choose Size: Select a social media preset or enter custom width/height pixels.
  3. Adjust Crop: If using 'Fill' mode, drag the image to center your subject in the preview.
  4. Download: Click the button to get your perfectly sized image instantly.

Your Images Stay Private

We prioritize your security. Unlike many other resizing tools, OnlineImageTools.net processes everything locally in your browser. Your photos are never uploaded to our servers, and we never store your files.

Frequently Asked Questions

What size should an Instagram post be?▼
For the best quality, use 1080×1080 pixels for square posts or 1080×1350 pixels for portrait (vertical) posts to take up more screen space.
Does resizing reduce quality?▼
Scaling down is generally lossless. Scaling up can cause pixelation, but our tool uses high-quality resampling to minimize this effect.
Can I resize multiple images at once?▼
Yes! Our tool supports batch processing. Upload multiple files, apply your settings, and download them all as a ZIP file.
Are my images uploaded to your servers?▼
No. All processing happens on your device. Your images never leave your computer.
Can I crop and resize at the same time?▼
Yes. Selecting a preset often involves cropping to the correct aspect ratio. You can manually adjust the crop area before downloading.

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Compress Image

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Resize & Crop

Change image dimensions for social media.