How to add automatic subtitles to a video
To add automatic subtitles to a video in 2026, there are two kinds of tools: those that caption the whole video as is (YouTube Studio, the TikTok or Instagram editor, CapCut), and clipping tools that cut the video into excerpts and caption each clip word by word (ClipOnIt, Opus Clip, Submagic…). Either way the method is the same: clean audio, automatic transcription, two minutes of proofreading (names, numbers), a readable style, then export with the captions burned into the picture for social feeds, or as a separate track for YouTube. On ClipOnIt, word-by-word captions are included on every plan, free included.
Which tool for which video?
| Your case | Right tool | Captions | Good to know |
|---|---|---|---|
| A long YouTube video you want accessible | YouTube Studio (automatic captions) | Separate track the viewer can turn on | Free; review them in Studio before publishing |
| A TikTok or Reel shot on your phone | The TikTok or Instagram editor | Generated in the app | Few style options; they do not carry over to other platforms |
| An already-edited video you want to style | CapCut, Submagic | Burned in, animated styles | You pick the moments yourself |
| A long video (podcast, interview, webinar) to turn into shorts | An AI clipping tool (ClipOnIt…) | Burned in word by word, on every clip | Moments are found, reframed and captioned in one pass |
Burned-in captions are part of the picture: they show everywhere, even where the platform offers no captions, but they cannot be turned off. A separate track (SRT file or YouTube captions) stays editable and optional for the viewer. For TikTok, Reels and Shorts, burned-in is the norm; for a horizontal YouTube video, a separate track is often enough.
The 6-step method
- Clean up the source audio. One mic per person, no background music under speech. Automatic transcription fails mostly when voices overlap or music covers the voice.
- Run automatic transcription. Current models time-stamp every word, which is what makes word-by-word highlighting possible.
- Proofread in two minutes. Errors cluster on proper names, numbers, jargon and punctuation. Fix the word, not the whole video.
- Pick one style and keep it. 3 to 5 words per line, bold sans-serif font, a single accent color. Choosing a style is covered in the caption styles that hold attention.
- Keep them in the safe zone. Lower-center in 9:16, never over the mouth or under the username and description (see short video length and format).
- Export in the right format. Burned into a 1080×1920 MP4 for shorts; separate track for 16:9 YouTube.
With ClipOnIt: word-by-word captions on every clip
ClipOnIt starts from a long video (MP4, MOV or WEBM file, or a YouTube link), transcribes it, finds the best moments and renders each clip with burned-in captions synced word by word. The settings:
- 5 styles: karaoke, boxed, outline, glow, minimal;
- 7 colors, 3 sizes, 3 positions, and 3 to 8 words per line;
- emojis and auto-zoom as options;
- caption editing word by word without re-generating the clip (paid plans);
- translation of captions into 6 languages (paid plans), to post the same clip in several countries;
- 4 export formats: 9:16, 16:9, 1:1 and 4:5, each with its own framing.
| Plan | Price | Videos | Word-by-word captions | Editing and translation | Watermark |
|---|---|---|---|---|---|
| Free | $0 | 2 videos in total, 20 min max | Yes | No | Yes |
| Starter | $29/month | 20 / month | Yes | Yes | No |
| Pro | $49/month | 60 / month | Yes | Yes | No |
| Business | $149/month | 200 / month, 3 seats | Yes | Yes | No |
Source: ClipOnIt plan catalog as of October 29, 2026, see the pricing page. Yearly: 10 months paid for 12. To try it without an account, the free YouTube to Shorts tool renders 3 captioned clips from a video up to 20 minutes.
To caption clips you already cut, Submagic and CapCut are options too; the point-by-point comparison is on ClipOnIt vs Submagic and ClipOnIt vs CapCut.
The most common mistakes
- Publishing without proofreading: a typo in the first three seconds shows more than anything else.
- Two lines of text at once: that is movie subtitling, hard to read on a phone.
- Platform captions on top of burned-in ones: the text shows twice. Turn off the app's auto captions if the video already has them.
- A bilingual clip: export one version per language instead.
FAQ
Can I add automatic subtitles for free?
Yes: YouTube Studio, the TikTok and Instagram editors and CapCut do it for free on a whole video. For word-by-word captioned clips from a long video, ClipOnIt's free plan (2 videos, with watermark) and its no-account tool do it too.
Are automatic subtitles accurate?
On clean audio, yes; plan to check proper names and numbers. On ClipOnIt, fixing a word happens in the editor on paid plans.
Burned-in captions or an SRT file?
Burned in for TikTok, Reels and Shorts, where most videos are watched on a phone and often muted; a separate track for a horizontal YouTube video, which the viewer can turn on or off.
Can I translate a clip's captions?
Yes on ClipOnIt, from Starter ($29/month), into 6 languages. Proofread the translation: idioms do not travel well.
Can I caption automatically from ChatGPT or Claude?
Yes, through ClipOnIt's MCP server: caption style, words per line and caption language are tool parameters.
Written by the ClipOnIt team. Updated October 29, 2026.