Resize images by pixels or percentage with fit, fill and exact modes — one image or many at once.
Social Media Tools
Browser processing
Social Media Image Resizer
Resize images to the recommended dimensions for popular social platforms, with fit or fill positioning.
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How to use Social Media Resizer
- Upload an image.
- Choose a platform preset and Fill or Fit mode.
- Pick a background colour for Fit mode and set quality.
- Resize and download.
About this tool
The Social Media Image Resizer scales your image to commonly recommended dimensions for popular platforms, using Fill (crop to fit) or Fit (pad with a colour). Sizes come from a dated config and are recommendations, not official specs.
Recommended settings
Settings we suggest
- Fill is best when the subject is centred; Fit avoids any cropping.
- Verify the latest platform size if precise dimensions matter.
Supported formats
Input: JPEG, PNG, WEBP, AVIF, GIF, BMP. Output: JPEG, PNG, WEBP.
Input formats
JPGPNGWebPAVIFGIFBMP
Output formats
JPGPNGWebP
Quality & file size
Lossy formats (JPEG, WebP, AVIF) trade detail for smaller files as you lower the quality; PNG stays lossless regardless of the slider. The tool always shows the original and result sizes so you can judge the trade-off, and it never recommends a result that is larger than your original as an “optimisation”.
Privacy
Every image is decoded, transformed and re-encoded entirely in your browser using the Canvas API and a Web Worker. Files are never uploaded, are not stored in localStorage, and are cleared from memory when you remove them or close the page.
More detail: how we process images, security and our privacy policy.
Common issues & limitations
- Recommended sizes change over time; check the last-verified date.
- We are not affiliated with any platform and use plain text labels only.
- All processing happens on your device; nothing is uploaded, so very large batches are limited by your available memory.
Frequently asked questions
Are these sizes official?
They are commonly recommended dimensions kept in a config file with a last-checked date. Platforms change their specs, so verify against the latest guidance.
Do you use official platform logos?
No. We use generic text labels and are not affiliated with or endorsed by any platform.
Are my images uploaded to a server?
No. Every image is decoded, processed and encoded entirely inside your browser using the Canvas API. The files never leave your device and are discarded when you close the page.