Image Resizer Online Free

Image Resizer

Resize images to specific dimensions or social media presets. Batch resize. Maintain aspect ratio.

100% private - everything runs in your browser, no data is sent anywhere

🖼️

Drop an image here or click to upload

JPEG, PNG, WebP supported

Was this tool helpful?Report an issue

Related Tools

Image Compressor

Compress JPEG, PNG, WebP images up to 90% smaller. All processing in your browser.

most popular

Image Format Converter

Convert images between JPEG, PNG, and WebP formats. Batch convert with quality control.

image converter

Image to PDF Converter

Convert images to PDF. Drag to reorder, set page size and margins. Multiple images into one PDF.

image to pdf

Image Dimensions for Social Media and Web

Each platform has recommended image sizes. Using the right dimensions avoids cropping, blurriness, and wasted space. These are the commonly used sizes as of early 2026 - platforms update these periodically, so check the latest guidelines if precision matters.

  • Instagram post - 1080 x 1350 px (4:5 portrait) or 1080 x 1080 px (square)
  • Instagram Story / Reels - 1080 x 1920 px (9:16)
  • Facebook cover - 820 x 312 px (desktop display)
  • LinkedIn banner - 1584 x 396 px
  • Twitter/X header - 1500 x 500 px

Resolution, DPI, and Why It Matters

For web use, only the total pixel dimensions matter. A 1200 x 800 px image looks the same on screen whether it is tagged as 72 DPI or 300 DPI - monitors display pixels, not inches.

DPI (dots per inch) matters for print. 300 DPI is the standard for professional printing. If you are resizing an image for a printed brochure or business card, check the required DPI with your printer.

Why Upscaling Reduces Quality

Enlarging an image beyond its original pixel dimensions forces the software to create pixels that did not exist in the original. This results in blurriness or artifacts because the detail simply is not there. Always start with the highest resolution source and resize down, not up.

Frequently Asked Questions

How does the image resizer work?+
Upload an image, set your desired dimensions or choose a social media preset, and download the resized version. Supports JPEG, PNG, and WebP formats. All processing happens in your browser.
What are the correct image sizes for social media?+
Common sizes (as of early 2026): Instagram post 1080x1350 px (4:5), Instagram Story 1080x1920 px (9:16), Facebook cover 820x312 px, LinkedIn banner 1584x396 px, Twitter/X header 1500x500 px. Platforms update dimensions periodically.
Can I maintain the aspect ratio when resizing?+
Yes. Lock the aspect ratio to resize proportionally, or unlock it to set custom width and height independently. Changing the aspect ratio will crop or distort the image.
Does DPI matter for web images?+
For web use, only total pixel dimensions matter. A 1200x800 px image looks the same on screen whether tagged as 72 DPI or 300 DPI. DPI only matters for print - 300 DPI is the standard for professional printing.
Why does enlarging an image make it blurry?+
Upscaling forces the software to create pixels that did not exist in the original. The detail simply is not there, so the result looks blurry or shows artifacts. Always start with the highest resolution source and resize down.
Is my image uploaded to a server?+
No. All resizing is done locally in your browser. Your images stay private on your device.