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Tumblr Banner Resizer

Resize your images to the perfect Tumblr header and avatar sizes for free right in your browser with no uploads.

Popular Tools

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Drop your heavy JPGs or PNGs here. We will instantly compress them to next-gen WebP format for faster load times.

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Paste your raw text and instantly generate a formatted, paginated PDF document.

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Enter a URL to instantly extract all images. Select exactly which ones you want to download as optimized WebP files.

Free Tumblr Banner Resizer Online

Tumblr blogs look best with properly sized headers and avatars. This free tool crops your images to the exact dimensions Tumblr uses so your blog stands out and looks creative and professional.

How to use this free tool

1

Upload your image to the free Tumblr banner resizer.

2

Choose header or avatar format for your Tumblr blog.

3

Download your perfectly sized Tumblr image for free.

Frequently Asked Questions

Everything you need to know about our free service.

Is the Tumblr banner resizer free?

Yes. You can resize as many images for Tumblr as you want completely free with no registration.

What size should a Tumblr header be?

Tumblr headers work best at 3000 x 1055 pixels. Avatars should be 128 x 128 pixels as a perfect square.

Are my images safe when resizing for Tumblr?

Yes. All cropping runs inside your browser. Your images never get uploaded to any server.