When posting a static image:
- Make sure the file is no larger than 20 MB and is in either JPEG or PNG format.
- We don’t support CMYK files or other non-RGB image files, so save the image in RGB and try uploading again.
- Try saving a brand new version of the file using the photo/image application of your choice. This can sometimes help remove any encoding snags that may have been in the original file.
- We recommend your images be 540 pixels wide by 810 tall. Stay within that limit to avoid your images being scaled down on the dashboard.
- If you click on an image in a post, you will be taken to a larger version of the image if one is available. That larger version can be up to 2048 pixels wide and 3072 pixels tall. Note that clicking through to that larger version is only possible if the image on the blog does not have a click-through link set.
When posting an animated GIF:
- We recommend that your GIFs be no more than 540 pixels wide.
- Any GIFs under 3 MB don’t get compressed at all.
- If you’re uploading a compressed GIF, the file should be no larger than 5 MB.
- If your GIF is uncompressed and under 10 MB, we’ll do our best to compress the file down for you. You’re welcome.
In general, we do what we can to serve your GIFs uncompressed, in all their glory, but at the end of the day, we try and give all Tumblr users the best (and fastest) experience. That’s why, if we’re unable to successfully serve a GIF that exceeds 5 MB, Tumblr will serve only the first frame.
Followed all the above and still having trouble? Send us a message, along with the file you’re trying to upload. We’ll help you out.