LinkedIn video captions: SRT upload vs burned-in captions, specs and professional styling

LinkedIn videos play in a feed that most people scroll at work, with the sound off, between messages. If the words are not on the screen, the video is a silent face. There are two ways to put them there: upload an SRT caption file with the video so LinkedIn shows closed captions, or burn the captions into the video before you upload so they are part of the picture.

LinkedIn's own route is free and gives viewers captions they can toggle, but it works from the desktop site only, needs a correctly timed SRT, and uses LinkedIn's plain caption style. The burned-in route works from any device, gives you a restrained professional style you control, and produces a file you can also post to YouTube or embed on your site. This guide covers LinkedIn's specs, both routes step by step, and how founders, recruiters and coaches tend to use them.

Why captions matter more on LinkedIn than anywhere else

Three things about LinkedIn make captions close to mandatory.

• Sound-off viewing. The feed autoplays video as members scroll, and most members are at a desk or in a meeting, so the default is muted. A video that cannot be followed without sound is skipped.
• Professional viewers, professional expectations. Your audience includes colleagues, clients and hiring managers. A clean caption reads as care; a missing one reads as an afterthought.
• Accessibility. Deaf and hard-of-hearing professionals are in every industry. Captions are also the only way a viewer with a noisy office or a bad connection gets the message.

LinkedIn's video specs, as of 18 October 2026

LinkedIn's Help page on video sharing lists the limits. The ones that matter for captions:

Read from linkedin.com/help/linkedin/answer/a548372 on 18 October 2026. Export an MP4 in H.264 at 1080p and you are inside every row.

1:1 vs 16:9 vs vertical: which shape to post

LinkedIn accepts anything from 1:2.4 to 2.4:1, so the choice is about screen space and where the captions land.

• Square (1:1) fills more of the phone screen than a landscape video and still works on desktop. It is the common choice for talking-head posts. Captions sit in the lower third with room to spare.
• Landscape (16:9) suits screen recordings, slides and anything you will also put on YouTube. On a phone it is a short strip in the feed, so captions need to be larger than you would use elsewhere.
• Vertical (9:16 or 4:5) takes the most feed space on mobile. Keep captions in the middle band rather than the bottom edge, where LinkedIn's post text and reactions sit when the video opens full screen.

If a video will go to LinkedIn and YouTube, shoot 16:9 and consider a 1:1 crop for LinkedIn. If it is LinkedIn-first, 1:1 is the safe default.

Route 1: upload an SRT file with the video (LinkedIn's closed captions)

LinkedIn Help, read 18 October 2026, says captions are added "using the desktop experience" and that "You must have an associated SRT (SubRip Subtitle) file attached to the video before it can be posted". The steps on that page:

1. On your desktop LinkedIn homepage, click the Video icon in the share box.
2. Click Select video to share and choose the file from your computer.
3. In the video preview, click Edit in the top-right corner.
4. Click Select Caption, attach your SRT file, and confirm.
5. Add your post text and hashtags, then click Post.

LinkedIn says this works for both personal accounts and LinkedIn Pages, and that once the video is uploaded and processed you get a notification and the captions are viewable. Note the page carries a "Last updated: 5 years ago" stamp, so exact button labels may have moved. The structure, attach the SRT before posting, has not.

What you need for this route is an SRT file: a plain-text file of numbered cues with start and end times and the text for each. If you already have a transcript, the TXT to SRT generator turns typed lines into timed cues you can adjust; SRT vs VTT vs TXT explains the formats, and the VTT to SRT converter handles a VTT from another platform. Before uploading, run the file through the subtitle sync checker so the cues land on the speech.

Strengths of this route: it is free, viewers can toggle the captions, and the text is searchable by LinkedIn. Limits: desktop only, the SRT has to be timed before you post, the style is LinkedIn's, and if you later edit the video or post it anywhere else the SRT does not go with it.

Route 2: burn the captions into the video

Burned-in captions, also called open captions, are rendered into the frames before upload. The difference is covered in burned-in captions vs closed captions. On LinkedIn they have four advantages:

• They work from the phone app as well as desktop, because the captions are already in the file.
• They look the same on every device and in every embed, including your website, your newsletter and YouTube.
• You choose a style that fits your brand instead of LinkedIn's default.
• Nobody can scroll past them with captions turned off.

The CapsAI LinkedIn video caption generator handles this in a browser:

1. Export the video as an MP4 or MOV, up to 10 minutes long. That covers almost every LinkedIn post; a longer webinar cut should be trimmed to its best ten minutes anyway.
2. Upload it and choose the spoken language. CapsAI offers 11: English, Hinglish, Hindi, Bengali, Telugu, Marathi, Tamil, Urdu, Gujarati, Kannada and Punjabi. Captions come out in the language spoken; there is no translation.
3. Read the timed draft. Fix names, company names, acronyms and figures, which are exactly the words a professional audience will notice.
4. Pick a style, set the size and position, and export the MP4 with the captions burned in, at 1080p on Starter or up to 4K on Creator and Pro.
5. Upload the captioned file to LinkedIn from any device and write your post.

CapsAI does not take a LinkedIn link, so you upload the file. It does not export an SRT or VTT file and does not post to LinkedIn. New accounts get 3 free minutes to start; one-time packs start from $4 (₹49 in India, €4 in the euro area), nothing renews, and watermark-free export comes with every paid pack.

You can also do both: burn the captions in for everyone, and attach an SRT from desktop so LinkedIn has a text track too. If you do, position the burned-in captions slightly above the bottom edge so the two do not overlap.

Professional styling: what works on LinkedIn

The caption styles that work on TikTok mostly do not work here. Rules that hold:

• One or two lines, lower third. No single-word pop, no bouncing. A calm two-line caption reads as competent.
• A plain sans-serif at a readable size. On a 16:9 video viewed on a phone, go larger than feels natural on your monitor.
• High contrast without noise. White text with a thin dark outline or a soft dark band behind it works on any footage. Avoid bright highlight colors unless they are your brand color.
• Keep the sentence intact. Break lines at phrase boundaries, not mid-clause, so a viewer never reads half a thought while the other half waits.
• Match the speaking pace. Captions that flash by faster than reading speed lose the viewer. The subtitle reading speed checker flags the lines to split.

How founders, recruiters and coaches use captions

A founder posting a 90-second update. Shot on a phone, 1:1, talking to camera. The founder burns in two-line captions in the company's typeface, reads the draft to catch the product names, and posts from the phone. The same file goes into the investor newsletter, where it plays in an email client with no caption support at all.

A recruiter sharing a role. A 45-second landscape clip, half talking head and half screen recording of the job page. Captions are burned in so the role title, location and salary band are on screen in words as well as speech, because candidates skim. From desktop, the recruiter also attaches an SRT so the text is searchable.

A coach clipping a webinar. A 60-minute session is cut into three 5-minute highlights. Each is exported, captioned with burned-in text, and posted over three weeks. The captions stay with the clips when they are added to the course page later. If the recording came from Zoom, captions for Zoom recordings and webinars covers that start of the process.

Checklist before you post

1. Export MP4, H.264, 1080p, inside LinkedIn's 5 GB and 15-minute limits.
2. Decide on 1:1 or 16:9 based on where else the video will go.
3. Choose the route: SRT from desktop, burned in from anywhere, or both.
4. Read every caption against the audio, especially names, numbers and acronyms.
5. Watch the finished video once on a phone with the sound off. If you can follow it, so can your feed.

What to do next

If you have a transcript and post from desktop, build the SRT with the TXT to SRT generator and attach it. If you post from your phone, want a style you control, or will reuse the clip elsewhere, caption the MP4 with the LinkedIn video caption generator and upload the finished file.