How to Add Captions and Overlays to Instagram Reels

Instagram has published a refreshed guide to making Reels, and the most useful part for anyone searching how to add captions to Instagram Reels is one sentence: "Text overlays highlight key moments you choose, while captions make your entire spoken audio visible." They are two tools with two jobs, and Instagram recommends using both. Here is what the guide says, what it does not, and an edit that gets captions right before the Reel ever reaches the app.

What Instagram's Reels guide says

The guide, titled "How to make Instagram Reels: the complete 2026 guide", is on Instagram's own blog. Social Media Today reported it on 28 September, and BuzzInContent followed on 30 September. Social Media Today was fair about it: there is no new information as such, but it is the clearest statement yet of what Instagram wants from a Reel.

Three parts of it matter for the edit:

• Length comes in bands. Reels run from 3 seconds to 3 minutes. Instagram suggests 3 to 15 seconds for transitions, trends and one-liners, 15 to 60 seconds as "the sweet spot" for tutorials and most formats, and 60 seconds to 3 minutes for longer stories, walkthroughs and detailed how-tos.
• Captions and overlays are not the same thing. Captions transcribe everything that is said, in sync with the audio, for viewers watching without sound and for viewers who are deaf or hard of hearing. Text overlays are words you place at the moment you choose, usually to make a point land or to hook someone in the first frame.
• The first second counts. The guide asks for Reels that are "high-quality, original and engaging from the first second", and says a strong line of text in the first frame can do as much as a good thumbnail.

Instagram also generates captions for you in the app, and the guide tells you to review the text for accuracy and fix any word that is wrong. That is good advice, and it is also the case for doing your captions before you upload.

Captions vs text overlays, in practice

The simplest way to keep the two straight is to ask who chose the words.

• Captions are the speech. Every word, in order, timed to the audio. You do not choose them; you correct them.
• Overlays are your editorial. A hook in the first frame, a number you want remembered, a label on a step. You choose every one, and there should be few of them.

A Reel with overlays and no captions leaves a muted viewer guessing at everything between the highlights. A Reel with captions and no overlays is accessible but flat: nothing tells the scroller in the first second why to stay. Instagram's advice to use both is the right call.

Why caption before you upload

Instagram's own captions are free and quick, so this is a choice, not a rule. Doing them in your editor instead gets you three things:

• One correction, everywhere. Captions burned into the video go wherever the file goes. Post the same cut to YouTube Shorts or TikTok and you do not fix the same misheard name three times in three apps.
• Your style, your placement. You decide the face, the size and where the line sits, so it stays clear of the buttons and the account name along the bottom of a Reel.
• No surprises after posting. You read every cue on the timeline before export, not after the Reel is live.

The trade is that burned-in captions cannot be switched off by the viewer. If you burn them in, leave Instagram's automatic captions off for that Reel, or the viewer gets the same words twice.

A caption-first edit for Reels

This is the order that avoids redoing work, and every step runs free in flshy, in the browser, with your footage staying on your own machine.

1. Trim to a length band. Decide which of Instagram's bands the Reel belongs in before you cut. Most talking-to-camera tips belong in 15 to 60 seconds. Drag the clip onto the timeline and trim to the point.
2. Cut the dead air. Open the Audio tab and use Remove silent gaps. It proposes before it cuts, with the number of gaps, the time they would save and the length you would end up with, which tells you straight away whether you are inside the band. The detail is in remove silence from a recording.
3. Generate the captions. Select the clip, open Captions, pick the spoken language or leave it on auto detect, and press Generate captions. Transcription runs on your own machine. When the transcript comes back, press the button under the list that reads Add 24 as Editable Text, or whatever your count is, which is the press that actually puts the cues on the timeline. The full run is in add captions to a video.
4. Correct every cue. Each cue is an ordinary text clip, so retype the names, brands and jargon the model got wrong. Speech models are weakest exactly where your video is most specific, which is the same advice Instagram gives about its own captions. There is a fuller checklist in how to edit auto-generated captions.
5. Style it and move it up. Pick a preset, then use the Properties tab to move the caption anchor up out of the bottom of the frame, where Instagram puts its own interface. Short cues read best; flshy cuts generated captions to five words at most.
6. Reframe if the source is landscape. In the AI tab, open Advanced and expand Auto Reframe, choose the Instagram Reels preset for 1080 x 1920, and run it. It follows the subject rather than cropping down the middle. See turn a landscape video vertical.
7. Export, then add the overlays in Instagram. Export H.264 MP4 with no watermark, upload, and use Instagram's own text tool for the hook and any key points, timed where you want them. Captions come from your edit; overlays are the few words you choose at the end.

Small things that make Reel captions work

• Fix the first cue first. It is on screen at the moment the viewer decides to stay or swipe.
• Do not cover the face. On a talking-head Reel the eyes do a lot of the work. Captions that sit across the mouth or chin fight the speaker.
• Use the right language. flshy transcribes 14 languages plus auto detect, and naming the language yourself helps most on short clips with little audio to judge from.
• Bring subtitles you already have. If a transcript already exists, import the SRT or VTT file and every cue becomes an editable text clip, then restyle it, because imported cues arrive in plain styling.
• Keep overlays rare. If every second has an overlay, none of them is a highlight any more.

What to watch next

Instagram keeps adding editing features to its own Edits app, and the guide points creators there for more precise work. The questions worth watching are whether Instagram changes how it handles captions on uploaded videos, and whether the 3-minute ceiling moves. We will cover either here, with the source linked. In the meantime, every guide behind this post is on the tools page.