For Social Media Creators

Captions for Reels, TikToks & Shorts

85% of social videos are watched on mute. Add burned-in captions to your Reels and TikToks in minutes — 9:16 or 16:9, your font, your color.

Try it free — no credit card
How it works

Three steps. That's the whole thing.

  1. Upload — Drop in your vertical or horizontal video clip from your phone or editing app.
  2. Transcribe or paste — Auto-transcribe your audio or paste your spoken script for instant alignment.
  3. Download — Export a 9:16 or 16:9 captioned MP4 with burned-in subtitles ready to post.
Features

Built for social media creators

9:16 vertical output

Native vertical format for TikTok, Instagram Reels, and YouTube Shorts — no cropping or letterboxing.

Burned-in captions

Captions are rendered directly into the video so they're visible on mute on every platform and device.

Auto-transcription

Drop in your video and get accurate captions in minutes — no typing, no timeline scrubbing.

Custom fonts & colors

Match your caption style to your brand — choose font, weight, and color for every video.

Free to start

No credit card required. Caption your first Reel or TikTok immediately on the free tier.

Perfect for social media creators

Captions are table stakes for social video now. Viewers scroll feeds on mute, in loud environments, and with the sound off by default. Burned-in captions keep your content watchable in any scenario. CaptionFit makes it fast — upload your clip, transcribe, and render in minutes.

Whether you're captioning talking-head content, voiceovers, or interview clips for Instagram Reels, TikTok, or YouTube Shorts, CaptionFit handles 9:16 vertical video natively. No awkward cropping. Paste your script for instant alignment or let auto-transcription do the heavy lifting — then customize the caption font and color to match your brand.

If you create music content alongside your social videos, see how musicians use CaptionFit for lyric videos. If you post longer video content to YouTube, check out the YouTube closed captions guide.

FAQ

Common questions

How do I add captions to Instagram Reels?
Upload your Reel video to CaptionFit. Auto-transcribe it or paste your script, then render a 9:16 captioned MP4. Download the file and upload it to Instagram as your Reel — the captions are burned in and visible even on mute.
How do I add subtitles to a TikTok?
Upload your TikTok video to CaptionFit, transcribe or paste your script, and render a 9:16 captioned video. Download the MP4 and post it on TikTok. Burned-in captions work on all devices and don't depend on TikTok's subtitle toggle.
Does CaptionFit support vertical 9:16 video?
Yes. CaptionFit is built for 9:16 vertical video — the native format for TikTok, Instagram Reels, and YouTube Shorts. It also supports 16:9 widescreen for YouTube and other platforms.
Can I customize the caption style and font?
Yes. CaptionFit lets you customize font, caption color, and style to match your brand. Stand out on the feed with captions that look like your content.
Is CaptionFit free for social media creators?
Yes. CaptionFit has a free tier with no credit card required. Start adding captions to your Reels, TikToks, and Shorts immediately at captionfit.com.

Stop posting silent videos. Add captions in minutes.

Try it free — no credit card