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Specs and limits

Tumblr specs and limits

Tumblr text is limited to 4,096 characters, counted by code points. This page lists every text, media and posting rule 1Post checks for Tumblr: counts, sizes, lengths, threads and the daily cap. Where Tumblr publishes a figure on its own page we cite it with the date we read it.

Also:Schedule Tumblr postsSocial media posting limits by networkSocial media posting limits table

Updated 2026-10-23

What 1Post checks for Tumblr

RuleWhat 1Post checks
Text limit4,096 characters, counted by code points
Media acceptedImages, GIFs, Video
Images per post30
Videos per post1
ThreadsYes, as a chain of replies
First commentNo
Posts per day, per connected account (1Post)50

These are the limits 1Post applies in the composer, so a post that passes is not refused for them when it is sent. A network can still refuse a post for reasons outside these rules, such as its content policies.

What Tumblr publishes

FactSource
Tumblr allows 250 new published posts per day per user and 250 image uploads per day per user.Tumblr API v2, read 2026-10-22
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Questions

How is Tumblr text counted?

Tumblr text is counted by code points. The character counter applies the same rule.

Where do these Tumblr limits come from?

They are the limits 1Post checks before a post is sent. Figures the network publishes on its own page are cited above with the date read; the rest are checks 1Post sets.

How often is this page updated?

When a network changes a rule or we read a newer figure, the page changes with it. The date at the top shows the last change.

Sources

Free image resizer and cropper for social postsHow to save a set of networks for new posts1Post vs Buffer: price, networks, API
Schedule Tumblr posts: formats, limits, setupSocial media posting limits by network, datedSocial media posting limits table, every network

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