How to Add Subtitles to Any Video — Free, No Sign-Up

Adding subtitles to a video used to require professional software, hours of manual work, and sometimes a significant budget. AI has changed all of that. AddTranscripts uses Google's Speech-to-Text engine to generate accurate, word-level captions for any video in under two minutes — completely free, with no account required.

Whether you're a content creator adding captions to a YouTube video, a social media manager preparing clips for TikTok and Instagram, or someone who just wants an accessible version of their content, the process is the same: upload, review, export.

Step-by-Step: Adding Subtitles with AddTranscripts

Upload your video — drag and drop or browse to select your file. MP4, MOV, MKV, AVI, and most common formats are supported.
Select your language — choose the language being spoken in the video. AddTranscripts supports 90+ languages including English, Spanish, French, Hindi, Tamil, Telugu, Arabic, Mandarin, and more.
Wait for transcription — the AI processes your audio and returns a word-level transcript. Most videos under 10 minutes complete in under 60 seconds.
Review and edit — use the built-in editor to correct any errors. Even highly accurate AI transcription occasionally mishears proper nouns or technical terms. A quick review ensures your subtitles are publication-ready.
Export or burn in — download your subtitles as an SRT file (for YouTube, Vimeo, or video editors) or burn them permanently into the video for social media platforms.

Burned-In Subtitles vs Subtitle Files (SRT/VTT)

There are two fundamentally different ways to add subtitles to a video, and the right choice depends on where you're publishing.

Burned-in subtitles (open captions) are permanently embedded into the video file itself. Every viewer sees them automatically, regardless of platform, device, or settings. This is the best approach for social media — TikTok, Instagram Reels, LinkedIn, and Facebook don't reliably display uploaded subtitle files, so burning captions in is the only way to guarantee viewers see them. The tradeoff is that burned-in subtitles can't be turned off.

Subtitle files (SRT, VTT) are separate text files that contain the caption text and timing information. Viewers can toggle them on or off. YouTube, Vimeo, and most video hosting platforms support uploaded subtitle files. YouTube also indexes the caption text for search, which means uploading an SRT file can improve your video's discoverability. AddTranscripts exports both SRT and VTT formats.

SRT vs VTT: What's the Difference?

SRT (SubRip Text) is the most widely supported subtitle format. It works with YouTube, most video editors (Premiere Pro, DaVinci Resolve, Final Cut), and virtually every media player. SRT files are plain text with numbered entries, timestamps, and subtitle text.

VTT (WebVTT) is the web standard for subtitles and is used by HTML5 video players. If you're embedding video on a website, VTT is usually the better choice. VTT supports additional formatting options like positioning and text styling that SRT doesn't.

For most creators, SRT is the right choice. Export VTT only if you specifically need it for a web embed.

Why Captions Improve Your Content Performance

Adding captions isn't just an accessibility feature — it directly improves content performance across every platform:

85% of social media videos are watched without sound. Viewers scrolling on their phone in a quiet space, on a commute, or at work won't hear your audio. Captions are the only way to communicate with this audience.
Captioned videos get 40% more watch time on average. Captions reduce cognitive load and help viewers follow along, leading to longer viewing sessions.
YouTube SEO — Google indexes caption text. A captioned video ranks for more search queries than an identical uncaptioned video.
Global reach — non-native speakers can follow your content more easily when reading along. You can also add translated subtitle files for additional languages to reach international audiences.
Accessibility compliance — for organisations publishing video content, captions are often legally required under accessibility regulations.

Which Languages Are Supported?

AddTranscripts supports over 90 languages. The highest accuracy is achieved for widely spoken languages: English (US, UK, Australian), Spanish, French, German, Mandarin, Japanese, and Portuguese. Indian languages including Hindi, Tamil, Telugu, Malayalam, and Kannada are handled through Google's Speech-to-Text engine, which is one of the strongest models available for South Asian languages.

For mixed-language content (Hinglish, Spanglish, etc.), select the dominant language and manually correct the sections in the secondary language.

Is AddTranscripts Really Free?

Yes — completely free, with no account, no sign-up, and no credit card required. Upload a video, get your transcript, edit it, and export or burn it in. Your audio and video files are processed and immediately deleted from our servers — we don't store your content.

AddTranscripts is built and maintained by AIVantage, a suite of free AI-powered tools for content creators.