Tumblr Image Sizes 2026: The Complete Guide
Learn the correct Tumblr image sizes for 2026. Photo posts, blog headers, and profile photos — every dimension for sharp, well-formatted Tumblr content.
Whether you run a personal Tumblr blog or a brand page, using the wrong image dimensions causes your posts to look stretched, cropped, or blurry in the dashboard feed. This guide covers every Tumblr image size you need in 2026.
Tumblr Image Sizes at a Glance
| Format | Size (px) | Aspect Ratio | Notes |
|---|---|---|---|
| Feed photo post | 1280×(any height) | Any | Max width 1280 px; height flexible |
| Recommended post width | 540×(any height) | Any | Dashboard displays at 540 px wide |
| Profile photo | 128×128 | 1:1 | Minimum; upload larger for clarity |
| Blog header | 3000×900 | ~3.3:1 | Wide banner at top of blog page |
| Thumbnail (in feed) | 400×300 | 4:3 | Auto-generated from uploaded image |
Photo Posts: Width Is What Matters
Tumblr's dashboard displays photo posts at 540 px wide on desktop. Upload images at 540 px wide minimum — anything narrower gets upscaled and looks blurry.
For best quality, upload at 1080 px wide (exactly 2× the display width). Tumblr scales it down cleanly to 540 px, which looks sharp on Retina screens.
Height is flexible — Tumblr supports tall images without cropping, so vertical and portrait compositions work well. The maximum upload width is 1280 px.
Blog Headers: Wide and Short
Your Tumblr blog header displays at the top of your blog page as a wide banner. The recommended size is 3000×900 px. On smaller screens, the header crops from the center, so keep important content in the middle of the frame.
Tumblr blog headers don’t show in the dashboard feed — they’re only visible when someone visits your actual blog page directly.
Profile Photos: Small but Visible Everywhere
Your Tumblr profile photo (or avatar) appears next to every post you make in the dashboard. It displays very small — around 64×64 px in the feed — so keep it simple and recognizable.
The minimum upload size is 128×128 px, but uploading at 512×512 px gives sharper results on high-DPI screens. The photo is displayed as a circle on many themes, so center your subject.
Photoset Grids
Tumblr lets you upload multiple photos as a photoset grid (2–9 images). The grid layout and individual image sizes depend on how many images you add:
For photosets, upload all images at 1080×1080 px so Tumblr has enough resolution to work with regardless of the grid layout it picks.
How to Resize Images for Tumblr Using imresizer
- Go to imresizer.com/resize-image-for-tumblr
- Upload your image
- Select your format — Photo Post or Blog Header
- The correct dimensions are applied automatically
- Download your resized image
All processing happens in your browser.
Key Takeaways
Upload photo posts at 1080 px wide for sharp display at Tumblr's 540 px dashboard width. Use 3000×900 px for blog headers and keep key content centered. Upload profile photos at 512×512 px minimum. Use imresizer's Tumblr resize tool to size any image correctly before posting.