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How-to guide

How to make captions bigger on a video

Turn up the caption size for bold, phone-readable subtitles — and let auto-fit keep even the biggest words inside the frame.

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Quick answer

To make captions bigger on a video, upload your clip to AnimateCaptions, let it auto-transcribe the audio, then open the style controls and raise the caption font size up to Large. AnimateCaptions auto-fits any oversize word to the frame width inside an 85% safe area, so bigger text stays readable without overflowing or getting cut off, and the live preview matches the export exactly.

Step by step

How to make captions bigger in 5 steps.

From raw clip to big, readable captions — all in the browser.

  1. 01

    Upload your video

    Drag an .mp4 or .mov into the browser. AnimateCaptions transcribes the audio automatically with Deepgram Nova-3, so your spoken words become timed captions — no manual typing.

  2. 02

    Open the style and size controls

    Once your captions appear, open the style panel. Here you control the look of every line, including the font-size options that make the text larger or smaller.

  3. 03

    Increase the caption font size

    Bump the font size up to Large for big, phone-readable captions. Want extra punch? Pick a bold, oversize style so key words land harder on small screens.

  4. 04

    Check the live preview and drag to position

    The live preview matches the export exactly, so you can see the bigger size before you commit. Drag each line into place — captions stay inside an 85% safe area so nothing gets cut off.

  5. 05

    Export and download

    Hit export. AnimateCaptions renders the captions into the video at full resolution and gives you a finished MP4 with large, crisp text, ready to post anywhere.

Editor walkthrough

Edit every word before you export.

Live caption preview, click-to-correct transcript, per-line drag positioning, and 32+ animated styles to pick from.

Common questions

Making captions bigger — FAQ.

How do I make captions bigger?

Open the style controls in AnimateCaptions and raise the caption font size — Large is the maximum. The live preview updates instantly so you can see the bigger text before exporting.

Will bigger captions get cut off or overflow the frame?

No. Captions stay inside an 85% safe-area gutter, and any oversize word is automatically fit-to-width, so even very large captions never run off the edge or get clipped.

Can I make just one word bigger?

Yes — choose an oversize highlight style. These emphasise the key word in each line so it stands out, instead of uniformly enlarging every word.

Does the preview match the export?

Yes. The live editor preview matches the final render exactly, so the caption size you see is the size you get in the exported MP4.

Is it free?

Yes. AnimateCaptions auto-transcribes and exports for free with no credit card. Free exports include a small AnimateCaptions watermark; paid plans from $7.99/month remove it.

What caption size is best for TikTok and Reels?

Go large and readable. On phone-first feeds, big bold captions are easier to read — set the font size to Large and let the 85% safe area keep the text clear of the UI and frame edges.

Make your captions pop, free.

Upload a clip, size up the captions, download a readable MP4. No editing app, no credit card.

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