TikTok slideshow captions: formulas and templates for photo posts

How long can a TikTok slideshow caption be?

As of November 2026, TikTok's Creator Academy (opens in a new tab) says a post can have up to 4,000 characters, and the Content Posting API (opens in a new tab) allows a photo description of up to 4,000 UTF-16 runes. The same API limits a photo post's title to 90 UTF-16 runes.

You may still see 2,200 elsewhere. That was TikTok's figure when Photo Mode launched in October 2022 (opens in a new tab), and a German trade site reported the rise to 4,000 in August 2023 (opens in a new tab) (a secondary source for that date). Some schedulers still use the old number. When Hootsuite moved its Create tool to 2,200 (opens in a new tab) in October 2025, that was a limit of its own tool, not TikTok's.

Having 4,000 characters does not mean you need them. In our view most photo posts need only two or three short lines, and a long caption is a specific tool for specific formats, covered below.

What goes in each text slot of a photo post?

A slideshow has more places for words than a video does. Give each one a different job so they do not repeat each other.

How the title is shown to viewers inside the app is less certain than the API limit, so do not rely on the title alone. Write the cover and the caption's first line so each works if the title is not seen.

Which caption formula should you use?

Four formulas cover most posts. Choose by what the viewer should do after the last slide.

1. Echo and ask. Restate the hook in different words and end with a question the viewer can answer in a comment. Short. Best for quizzes and opinion posts.
2. Context and tip. One line of why this slideshow exists, one extra tip that did not fit a slide, then a save prompt. Medium. Best for lists.
3. Recap in text. The title, then the main content of the slides in plain lines, then a save prompt. Long. Best for recipes, checklists and cheat sheets. It also helps readers who cannot easily read small text in images.
4. Story continuation. The ending or the lesson that the slides did not show. Medium. Best for confession-style posts.

Keyword phrasing deserves a careful word. TikTok's 2020 Newsroom explanation (opens in a new tab) lists captions, sounds and hashtags as video information used in recommendations, and the current Help Center page (opens in a new tab) lists sounds and hashtags under content information. Neither page says anything specific about photo posts or about caption wording. Writing your topic in plain words is a sensible habit. Treat it as clarity, not as a ranking technique.

What are caption templates for each slideshow format?

Replace everything in braces. Keep the first line short, so it still works as a sentence on its own.

Title: {number} {things} for {specific reader}
{One line saying what the list helps with}.
Number {n} is the one I would start with. Which one do you already do?
Save this for {the moment the reader will need it}.
{3 to 5 hashtags: topic, format, niche}

For the slide side of this format, see the listicle slideshow format.

Title: {Option A} or {Option B}?
I would pick {A or B}, because {a one-sentence reason}.
Comment A or B and tell me what decides it for you.
Send this to the person who always picks {the opposite}.
{3 hashtags}

The matching slides are in the would-you-rather slideshow format.

Title: {dish or task} in {time}, {number} steps
You need: {item, item, item}.
Steps in short: {1}, {2}, {3}.
Swap: {one substitution or shortcut}.
Save it for {when you will use it}.
{3 hashtags}

Title: {the sentence that starts the story}
{Two lines on what happened after the last slide}.
{One thing you would do differently}.
Has this happened to you? Tell me below.

Title: {topic}: the cheat sheet
The full list in text, in case the slides are small on your screen:
- {item 1}
- {item 2}
- {item 3}
Save this and open it when {situation}.

A filled example of the first one, with invented content, shows the register:

How many hashtags should you add?

Keep the list short and relevant. On 17 August 2025 Social Media Today reported (opens in a new tab) that some users saw an in-app notice of a five-hashtag limit, and TikTok gave no official explanation. That makes five a reported limit, not a confirmed rule. We found no test data on how many hashtags work best. Three to five specific ones, chosen for topic, format and niche, stays safe whichever way the limit goes.

The editor lets you change the description, hashtags, tagged people, location, link and privacy while you swipe through the photos, according to the Creator Academy.

What should a caption avoid?

• Repeating the cover text word for word in the title and the first line.
• Writing 4,000 characters because the space exists.
• Planning around 2,200 characters, an outdated figure for photo posts.
• Burying the one thing you want the viewer to do under three lines of hashtags.
• Promising something in the caption that the slides do not deliver.
• Skipping alt text. TikTok said in a May 2025 post (opens in a new tab) that creators can add it during upload or after publishing.

How do you write the caption faster?

Draft the caption at the same time as the slides, from the same brief, so the two agree. Fyslide exports the slides as PNG or JPG together with the caption and a zip into a folder you choose, and you upload them to TikTok yourself. The export guide shows what the folder contains. For hooks to put in the title, use the slideshow hooks pillar.