How to Write Alt Text for TikTok Photo Posts
Describe what each image contributes, not every pixel it contains.
By Trytagly Editorial Team · Updated
Describe the image’s purpose and important visual information
For each photo in a TikTok post, write a short description that communicates the image’s purpose and any important visual information a person would otherwise miss. Describe what matters in context, include meaningful text that appears only inside the image, and skip details that do not change the message.
TikTok allows creators to add alternative text to photo posts so screen readers can describe the images to people who are blind or have low vision. In the TikTok app, upload or create a photo post, continue to the posting screen, open More options, choose Add alternative text, and enter a description beside the relevant photo.
TikTok’s current Support page says each description can contain up to 300 characters. That is a ceiling, not a target. The goal is not to inventory every color and object; it is to give someone access to the same point the image makes.
Give the caption and alt text different jobs
A TikTok caption applies to the whole post. Alt text applies to an individual image. Use the caption for shared context: why you made the carousel, what the viewer will learn, qualifications that apply to every slide, and the next step. Use each image’s alt text for information specific to that image.
Imagine a seven-photo carousel titled “Three ways to organize a small entryway.” The caption can explain that the examples are renter-friendly and require no drilling. One slide’s alt text might say, “Narrow white shoe cabinet beside an apartment door, with keys in a tray on top and three hooks attached by removable strips.” Repeating the shared context on every slide would add noise.
Do not assume visible text on a slide will be available to a screen reader. If those words carry the slide’s meaning and do not appear elsewhere in accessible text, include them in the alt text—verbatim when wording matters, or accurately paraphrased when the slide is crowded.
If a text-heavy carousel contains the substance of the post, add a compact summary in the caption as well. Alt text helps, but it should not become a hidden replacement for an entire article.
A five-step workflow for every image
First, identify the image’s job. Is it showing a result, teaching a step, comparing options, documenting an event, or setting a mood? Lead with information that serves that job. “Hands folding blueberries into pale muffin batter with a rubber spatula” is more useful in a recipe than “A bowl on a counter.”
Second, name the main subject, meaningful action, and the details needed to understand the point. Include identity traits only when they are relevant and known; do not guess someone’s race, gender identity, disability, mood, or relationship from appearance.
Third, carry over essential words and data from screenshots, charts, menus, quote cards, or tutorial slides. You do not need every status icon. “TikTok posting screen with More options expanded and Add alternative text highlighted” tells a reader what the screenshot teaches.
Fourth, add context that changes the meaning. Color matters in a makeup comparison or color-coded chart. Sequence matters in a before-and-after post. It may not matter in a screenshot that only demonstrates which button to tap.
Fifth, read the caption followed by every image description in order. Cut repeated introductions, promotional language, file names, and phrases such as “image of” when they do not help. Screen readers already identify an image as an image.
- State why this image belongs in the carousel.
- Name its subject, action, and meaningful details without guessing identity.
- Include essential words or data that exist only inside the image.
- Add setting, sequence, color, or composition only when it changes the meaning.
- Read the full post in order and remove repetition.
Three alt text examples to adapt
For a tutorial screenshot, replace “Screenshot of TikTok” with “TikTok photo-post screen with More options open; Add alternative text appears under Accessibility and translation.” The better version states what the screenshot is teaching and ignores unrelated controls.
For a product comparison, replace “Amazing must-have bags in the best colors” with “Two crossbody bags side by side: a black bag with one large zip compartment and a tan bag with three smaller front pockets.” Price, availability, affiliate disclosure, and the call to action belong in the caption or product interface.
For an event photo, replace a room inventory with the meaningful moment: “A workshop participant demonstrates a screen reader on her phone while attendees seated in a semicircle listen.” Décor is not important unless the post is about event design.
Review the carousel as one accessible package
Before publishing, check that the caption states the overall topic, the slide descriptions make sense in sequence, essential image-only words are included, and each description adds information rather than repeating the caption.
Review descriptions of people for unsupported assumptions. Keep calls to action and hashtags out of the descriptions unless they are visually relevant. If the post contains instructions, safety information, prices, product differences, or event details, ask a teammate to read only the caption and alt text.
CamelCase multiword hashtags in the caption—such as #SmallSpaceIdeas—are easier to parse than a run of lowercase words, but hashtags do not belong in alt text unless a hashtag is literally the meaningful subject of the image.
- Caption: state the overall topic and shared context in plain language.
- Sequence: make sure the descriptions can be followed in slide order.
- Essential text: carry over words or data that exist only inside images.
- Unique value: let every description add information instead of repeating the caption.
- Length: be concise while still communicating the image’s purpose.
Choose clearer TikTok video cover text · Find hashtags that fit your niche
Add or correct alt text after posting
TikTok’s Support page says you can add alt text to an existing photo post. Open the photo post in the app, tap More options, choose Edit post, select Add alternative text, update the descriptions, and tap Done.
Interfaces change, and a control may appear in a different place across app versions. If the option is missing, update the app and consult TikTok’s current accessibility instructions rather than deleting and reposting immediately.
Treat the post-publish editor as a correction path, not the default workflow. Writing descriptions while the images, source data, names, and intended sequence are still in front of you is faster and more accurate.
Frequently asked questions
- Can you add alt text to TikTok photos? Yes. TikTok’s current instructions say to create or upload a photo post, continue to the post screen, open More options, and select Add alternative text.
- How long can TikTok alt text be? TikTok says each photo description can contain up to 300 characters. You do not need to use all 300.
- Should I put TikTok keywords in alt text? Write alt text for people using screen readers, not as a place to repeat target keywords. TikTok does not confirm an independent search or distribution boost from keyword-stuffed alt text.
- Do I need to repeat text from the image? Include important text that appears only inside the image. If the same information already appears clearly in the caption, avoid repeating it in every description.
- Do decorative photos need a description? Focus on images that convey meaning. If a slide adds no information, consider whether it belongs in the carousel instead of inventing filler such as a file name.
- Can I edit alt text after publishing? TikTok’s current Support page says yes: open the photo post, tap More options, choose Edit post, select Add alternative text, make the change, and tap Done.