Add Captions to Video
A free AI caption generator that works like a conversation: you describe the captions, an agent makes them.
To add captions to a video, upload it to Valmera, type "add captions", and the AI agent transcribes every word and burns accurately timed captions into your video. You get 11 designed presets, 12 fonts, 9 entrance animations, per-word emphasis, and any color or position — all directed in plain English, with no timeline editing.
Caption Your Video Free
Upload once, type the request, export with captions burned in. No credit card required.
Add Captions Free →How to Add Captions to a Video with Valmera
- 1Upload your videoCreate a free account at valmera.io and upload your video — up to 2GB or 3 hours. Valmera analyzes it once with visible progress and builds a word-level transcript, the foundation for word-accurate captions.
- 2Type the caption requestType "add captions" — or direct the whole look in one line: "add captions in the beast preset with a yellow highlight", or "elegant captions at the top, three words at a time, in Playfair Display". The agent styles and times every caption for you.
- 3Preview, refine, exportPlay the preview and refine by replying — "make them bigger", "move them to the middle", "pop animation instead of fade". When it looks right, export a full-quality H.264 MP4 rendered from your original upload, captions burned in.
The one-time analysis of a long video takes a while and shows visible progress. After that, every caption change is just another message.
Word-Accurate Captions from a Real Transcript
Valmera doesn't guess at caption timing. During the one-time analysis it builds a word-level transcript of your footage, so every caption appears exactly when the word is spoken — and captions can be grouped anywhere from 1 to 16 words per line, depending on the rhythm you want. Fast, punchy one-worders for short-form; calm full lines for a tutorial.
When the transcript gets a name or a technical term wrong, you fix it in the editable transcript panel and the captions re-render from the corrected text. And because of Valmera's honesty layer, every agent reply is verified against the edit that was actually made — the agent cannot tell you the captions changed if they didn't. The full option list lives in the captions documentation.
11 Caption Presets, from Podcast to Beast
Ask for a look by name: podcast for clean talk-show lines, beast for loud high-energy captions, karaoke for word-by-word highlight captions, elegant for understated titles — plus stacked, iridescent, chrome, editorial, fashion, luxe, and impact. Every preset stays fully adjustable afterwards.
Prefer plainer captions? The classic style takes 9 entrance animations — fade, pop, slide-up, punch, blur-in, whip, flash, rise, and drop — while the presets above animate word by word on their own. And per-word emphasis is where chat control shines: mark any word big, huge, accented, boxed, serif, chrome, glowing, or chroma-shifted, with a scale for how hard the emphasis hits.
Real prompts that work: "add karaoke captions with a green highlight" · "captions in the luxe preset at the top of the frame" · "make the word FREE huge and yellow every time I say it".
12 Fonts, Any Color, Any Position
Twelve bundled fonts cover the styles creators actually use: Inter Display in Black, ExtraBold, and Bold weights, Anton, Bebas Neue, Archivo Black, Poppins Black, Syne ExtraBold, Playfair Display Black, Instrument Serif, DM Serif Display, and Montserrat. Sizes run S to XL on a continuous scale, positions are bottom, middle, or top, and colors are unrestricted — including a separate per-word highlight color.
One honest limit: custom font uploads aren't supported, so brand-exact typography means picking the closest of the 12. For on-screen text that isn't tied to speech — titles, lower thirds, callouts — use the separate add text to video tool, which shares the same font library.
Captions for Reels, Shorts, TikTok — and YouTube
Short-form and long-form want different captions, and both are one message away. For vertical platforms, ask for a 9:16 (or 1:1 or 4:5) reframe in the same conversation — captions rescale to the new frame — and lean on karaoke word-pop, punchy line lengths, and bold fonts. For YouTube, burned-in captions mean your styling renders identically in every player and embed, with nothing for viewers to switch on.
Who reaches for this: talking-head creators captioning every upload, podcast teams styling clips, marketers whose videos autoplay muted in feeds, and educators who want lessons readable anywhere. If your priority is comprehension rather than style, the auto subtitle generator page covers the accessibility side of the same system.
Describe Your Captions
Preset, font, color, position, emphasis — one typed request. Free to try.
Start Editing Free →More Than a Caption Generator
Captions are one request inside a full agentic editor. The same upload can have its silences cut, filler words removed, music added with automatic ducking under speech, zooms punched in on emphasized words, and a color grade applied — each by describing it, and all in the same conversation as your captions. Browse every AI video editing tool to see what one chat can replace, or compare plans on the pricing page.
Frequently Asked Questions
Add Captions to Your Video
Word-accurate, styled like the best creators', burned into a full-quality export. Free plan — no credit card required.
Start Captioning Free →