Named the way Facebook wants
Facebook only accepts caption files named like video.en_US.srt, with the language in lower case and the country in upper case.
Facebook video captions that work with the sound off.
Burn styled captions into the video, or upload a corrected SRT file viewers can switch on and off. AutoCap makes both from one transcript.
No credit card · 2 free minutes every month · MP4, SRT and VTT export
Plenty of Facebook video is watched with the sound off, and Facebook shows captions automatically to anyone who has it muted. A video without them is a video half the feed scrolls past.
There are two ways to give a Facebook video captions. Burned-in captions are part of the picture and look the same everywhere. A caption file is a separate track that Facebook displays and viewers can turn off.
AutoCap makes either from the same corrected transcript: a captioned MP4 for the feed on any plan, or an SRT file for Facebook's caption uploader on a paid plan.
Captions that suit the way Facebook plays video.
Burned in for the muted feed
Captions drawn into the picture can't be missed or switched off, and they keep your font, colors and animation.
A frame for the feed
Export at 4:5 or 1:1 for the feed, or 9:16 for Facebook and Instagram Reels, from the same project.
Checked before it posts
Correct names, places and numbers in the transcript, so neither the burned-in text nor the file repeats a mistake.
Caption a Facebook video in four steps.
- 01
Upload the video
Bring the MP4 or MOV into AutoCap; the speech comes back with a timestamp on every word.
- 02
Correct the transcript
Read it against the picture and fix whatever speech recognition misheard.
- 03
Choose your output
Render a captioned MP4 on any plan, or download an SRT on a paid plan and rename it for Facebook.
- 04
Post it
Upload the MP4 as it is, or add the SRT in the Closed captions step while you post the video.
How to upload an SRT to a Facebook video
When you post a video from a Page, Facebook's help center gives the steps as Photo/video, then your file, then Next, then Closed captions on the left, where you can auto-generate captions or upload an .srt file. For a video that's already posted, open the post's options and choose Edit post.
The file name decides whether it uploads at all: the name, a period, a lower-case language code, an underscore and an upper-case country code, then .srt. A file named any other way won't upload.
launch-video.en_US.srt launch-video.en_GB.srt launch-video.es_ES.srt launch-video.de_DE.srt launch-video.fr_FR.srt launch-video.pt_BR.srt
Burned in, or uploaded?
Burn the captions in when the look matters or the same video will also go to Instagram, TikTok or a website. Upload an SRT when viewers should be able to switch captions off or change how they look: on a computer, Facebook lets them change the caption text size and colors.
Pick one per video. A video with burned-in captions and an uploaded file can show the same words twice.
Good to know.
What should I name an SRT file for Facebook?
Use filename.[language]_[COUNTRY].srt, for example video.en_US.srt or video.de_DE.srt. The codes are case-sensitive, and a file named any other way won't upload.
Can Facebook create captions automatically?
Yes. When you post a Page video, the Closed captions step offers to auto-generate them. Check them before you publish, because names and jargon are where speech recognition slips.
How do viewers turn captions on?
People watching with the sound off see captions automatically; with the sound on, they switch captions on in the player. On a computer there's also an Always show captions setting under Settings and privacy, then Settings, then Media.
Is there a free way to caption Facebook videos?
Yes. AutoCap's free plan burns captions into clips of up to 60 seconds, with 2 minutes of transcription a month and a small watermark. SRT downloads come with the paid plans.
Try it on the next video you post.
The free plan needs no card. Upload a clip, check the captions yourself, and only upgrade when you want the watermark gone.