Tumblr Post Image Resizer540 × 810 px
Resize any image to exactly 540×810px for Tumblr. Free, instant, and nothing leaves your browser.
- Dimensions
- 540 × 810 px
- Aspect ratio
- 2:3
- Max file size
- 20MB
- Best format
- JPG
How to resize an image for Tumblr
Add your image
Click Choose image or drop a file into the box above. JPG, PNG and WebP all work.
Check the crop
The preset is already set to 540×810px. Drag inside the preview if you want to reposition the crop.
Download
Pick a format and click Download. You get a Tumblr Post Image at exactly 540×810px.
Tumblr Post Image size at a glance
Tumblr's dashboard column is 540px wide, so post images scale to fit that width. A 540×810 (2:3) canvas takes up good vertical space in the scrolling feed without being excessively tall.
Why 540×810 matters
Tumblr's feed is a single-column scroll, so image height directly controls how much screen real estate your post occupies. Taller images command more attention.
What happens when the size is wrong
Images wider than 540px get downsized to fit, wasting file size. Very wide landscape images appear tiny in the single-column layout.
Best practices
- Design at 540px width for the sharpest dashboard display.
- Vertical images dominate the feed better than landscape.
- Tumblr supports animated GIFs natively — leverage this for engagement.
Frequently asked questions
What size should a Tumblr Post Image be?
The recommended size for a Tumblr Post Image is 540×810 pixels (2:3 aspect ratio). The maximum file size is 20MB.
How do I resize an image for Tumblr Post Image?
Upload your image to the resizer above. It will automatically crop and resize to 540×810px. Adjust the crop position if needed, then download the result. Your image never leaves your device.
Which format should I use for a Tumblr Post Image?
Tumblr accepts JPG, PNG, GIF. We recommend JPG — Dashboard column width is 540px. Images wider than this are scaled down. Vertical (2:3) images work well for the scrolling feed.
Is my image uploaded anywhere?
No. TinyResize runs entirely in your browser. The file is read from your device, resized on your device, and downloaded from your device. Nothing is sent to a server.