If you have ever wondered how to add subtitles to video, you are not alone. Captions make your content accessible to deaf and hard-of-hearing viewers, help the roughly 85 percent of social media users who watch with the sound off, and give search engines readable text to index. The good news is that the whole process comes down to one small file format called SRT, and once you understand it, adding subtitles to any video takes just a few minutes.
What is an SRT file?
SRT stands for SubRip Subtitle. It is a plain text file that pairs lines of dialogue with the exact timestamps when they should appear and disappear on screen. Almost every video player, social platform, and editing tool understands SRT, which is why it has become the universal standard for captions.
Each entry in an SRT file has three parts: a sequence number, a start and end time written as hours:minutes:seconds,milliseconds, and the caption text itself. A single entry looks like this in structure: the number 1, then a timing line reading 00:00:01,000 arrow 00:00:04,000, then the words spoken during that window. Because it is just text, you can open an SRT file in any editor to review or tweak it.
How to generate captions from a transcript
The hardest part of learning how to add subtitles to video is not the video editor at all. It is producing an accurate transcript with correct timestamps. Typing captions by hand and syncing each line to the audio can take hours for even a short clip. This is where an AI transcription tool saves you the most time.
- Get your media ready. Have your video or audio file on hand, or copy the link if it is a YouTube video.
- Transcribe the audio. Upload the file to a transcription service, or paste the YouTube URL. Zipscribe accepts both audio and video uploads as well as YouTube links, so you do not have to extract the audio yourself.
- Let the AI do a second pass. Zipscribe runs the audio through the Zipscribe Engine and then applies a second AI accuracy pass to clean up punctuation, spelling, and phrasing before you ever see the result.
- Review speaker labels. If your video has more than one person talking, speaker identification separates each voice so your captions attribute lines correctly.
- Export as SRT. Once the transcript looks right, export it directly as an SRT file. Zipscribe exports TXT, SRT, and JSON, so the timed caption file is ready to download with the timestamps already in place.
That single export step replaces the tedious work of matching each line to the clock by hand.
How to add the SRT file to your video
Once you have an SRT file, you have two ways to attach it to your video: soft subtitles and hard subtitles. Both start from the same file.
Option 1: Soft subtitles (toggleable captions)
Soft subtitles ride alongside the video as a separate track that viewers can turn on or off. This is the approach used by streaming platforms and social networks.
- YouTube: Open YouTube Studio, select your video, go to Subtitles, choose your language, and upload the SRT file. YouTube reads the timings automatically.
- Vimeo: Open the video settings, find the Distribution or Advanced tab, and upload the SRT under captions.
- Social platforms: Many, including LinkedIn and Facebook, let you attach an SRT when you upload the video.
Soft subtitles are ideal because they keep the text crisp, let viewers pick a language, and preserve the accessibility benefits search engines and screen readers rely on.
Option 2: Hard subtitles (burned-in captions)
Hard subtitles are permanently rendered into the video pixels, so they always show no matter where the file is played. This is common for short vertical clips on TikTok, Reels, and Shorts.
- Open your video editor, such as a desktop tool like DaVinci Resolve or an online editor.
- Import both the video and the SRT file.
- Drop the SRT onto the subtitle or caption track. The editor places each line at the right moment using the timestamps.
- Style the font, size, and position, then export the video to bake the captions in.
Because the timings come from your SRT file, the editor does the alignment for you. Your only job is styling and exporting.
Tips for better subtitles
- Keep lines short. Aim for one or two lines of no more than about 42 characters each so viewers can read comfortably.
- Proofread names and jargon. AI gets you most of the way, but a quick scan for proper nouns and technical terms is worth it.
- Translate for a wider audience. If you want captions in another language, Zipscribe can translate across 99 plus languages, so you can publish subtitle tracks for viewers worldwide from the same source transcript.
- Reuse the text. The same transcript that feeds your SRT can also become a blog post, show notes, or SEO-ready YouTube titles, descriptions, and tags.
Explore the full Zipscribe feature set to see how transcription, translation, and export fit together.
Frequently asked questions
What is the difference between subtitles and captions?
Subtitles traditionally assume the viewer can hear and translate the dialogue, while captions also describe sounds and speaker changes for viewers who cannot hear the audio. In practice the terms are often used interchangeably, and an SRT file works for both.
Can I add subtitles to a video without editing software?
Yes. If you upload to YouTube, Vimeo, or most social platforms, you can attach an SRT file directly in the upload or settings screen without ever opening a video editor. You only need an editor if you want to burn the captions permanently into the video.
How do I get accurate timestamps for my captions?
Accurate timestamps come from the transcription step. When you export a transcript as SRT from Zipscribe, the start and end times are generated automatically from the audio, so you do not have to sync anything by hand.
Does Zipscribe export SRT files directly?
Yes. After Zipscribe transcribes your audio or video and runs its second accuracy pass, you can export the result as TXT, SRT, or JSON. The SRT export is ready to upload to a platform or drop into a video editor.
Start transcribing for free
Adding subtitles to your videos starts with a clean, accurately timed transcript, and Zipscribe gives you an SRT export the moment your transcription is done.
Start transcribing for free with Zipscribe and get 60 minutes every month, no credit card required.