Video captions: styles that are readable and on brand

Readable video captions follow four rules: one or two short lines at a time, a size that reads on a phone at arm's length, strong contrast against whatever is behind them, and a fixed position clear of the platform's own interface. On vertical video that position is usually the lower middle of the frame, not the very bottom, where apps place their buttons and the post's caption. Once those rules are met, typeface, colour and emphasis are where your brand comes in.

Open captions and closed captions

Open captions are part of the picture: burned into the video, always visible, styled exactly as you designed them. Closed captions are a separate text track that the player displays and the viewer can switch off, styled by the player rather than by you. Social video mostly uses open captions, because they survive every repost and play the same in every app. Long form video on your own site or YouTube benefits from a closed caption track too, which search engines and screen readers can use.

Captions are also an accessibility requirement, not only a style choice. The W3C's guidance on captions for prerecorded video explains what they need to include, such as speaker changes and meaningful sounds.

Where to put captions on video

On a 1080×1920 Reel, TikTok or Short, the app lays its own interface over the frame: the account name and post caption near the bottom, and like, comment and share buttons down the right edge. Captions placed in the bottom quarter disappear under them. Place yours in the lower middle, slightly left of centre if the line is long, and keep them in the same spot for the whole video so the eye learns where to look.

On landscape video, the traditional position just above the bottom edge, centred, is still right. On feed video at 1080×1350, keep captions above the bottom tenth or so, where some apps overlay a mute button and progress bar. Exact interface positions differ by platform and change often; social media safe zones keeps the current map.

Line length, size and timing

• Two lines at most. Three lines is a paragraph, and nobody reads paragraphs over moving pictures.
• Around 37 to 42 characters per line. That is the range broadcasters' and streaming services' subtitle guides commonly use. Social captions are often shorter: three to six words per screen reads fastest.
• Break at natural phrases. Split after a comma or before a new clause, not between an article and its noun.
• Big enough for a phone. On a 1080 px wide vertical video, caption text in the region of 48 to 64 px tends to read comfortably. Check it on an actual phone.
• On screen long enough to read twice. If you can't comfortably read a caption aloud before it vanishes, it is too fast or too long.

Caption styles that stay readable

There are only a few reliable ways to make text read over moving pictures. What they share is a consistent contrast between the letters and whatever sits right behind them. Fancy styles that break that consistency look good in one frame and vanish in the next.

That second frame is how Gradiently handles words over its moving backgrounds. A Mark knows where the text is: its calmest, best contrasting region moves behind the words and auto ink picks light or dark type line by line, without boxes, shadows or blur. For footage you shoot yourself, a solid bar is often the honest answer. Readable text on photos covers the options for busy images.

Making captions on brand

Brand captions change the voice of the text, not its legibility. Use your body or heading typeface if it has a bold weight that reads small; otherwise pick a clear sans serif and save the brand face for titles. Choose one ink colour and one highlight colour from your palette and use them in every video.

1. 1

   Write or check the transcript

   Fix names, numbers and product terms first. Captions with typos are worse than none.

2. 2

   Split into caption chunks

   Three to six words per screen for social, up to two lines for longer talks. Break at natural pauses.

3. 3

   Set one style

   Typeface, weight, size, ink, highlight and position. Save it so every video matches.

4. 4

   Place against the safe zone

   Preview at full size with the platform's interface in mind, not just in the editor.

5. 5

   Watch it muted

   Play the video on a phone with the sound off. If the story still makes sense, the captions work.

With Pro, Gradiently's video editor has a caption track on its timeline: write captions one by one or import an SRT or WebVTT file, set the text size, ink and background colour, and the captions are burned into the exported video. The walkthrough is in add captions to video, and if you are starting from a recording, talking head video covers framing and sound.