Drop in audio or video. CaptionFit transcribes and burns in the captions — then you build the picture: place scenes on a timeline, or generate backgrounds with AI. Export 16:9, 9:16 or 1:1, your font, your color.
Transcribe audio. Sync captions. Export video. No timeline-scrubbing, no manually nudging timestamps, no weird XML.
MP3, WAV, M4A, MP4 — up to 2 hours. Pick a language (or auto-detect) and a caption length, then hit Transcribe.
Got the words already? Paste them — one line per caption — to fix spelling and word grouping. We snap them to the audio.
Place scenes on the timeline — upload your own or generate them with AI — then pick a font, size, color and format (16:9, 9:16 or 1:1). Hit Export Video, or just download the SRT.
Twelve features, one editor. See everything CaptionFit does →
A 4-minute song aligns in about 20 seconds, so you spend your time on the video, not the wait.
Automatic captions →Paste lyrics or a script and CaptionFit aligns to those exact words. No more "ahh-vuh-tahn-deal" mishears.
Lyrics & script sync →Pick a font or upload your own, dial in size and color, choose 9:16 for Reels, 16:9 for YouTube or 1:1 for square posts. Hit Export Video.
Caption styles →Paste a Suno link and CaptionFit fetches the track, reads its lyrics, and captions it automatically — perfectly timed to the vocals, with no transcription. Then style it and export a lyric video for Reels, Shorts, or YouTube. Udio and Songer links work the same way. How song link import works →
The timeline is your video. Drop covers along the song — one for the intro, another for the drop — and drag either edge to set exactly when each shows. No footage? Generate an image or a short video background from a text prompt, or let Auto cover make one from your captions, right in the editor.
Caption once, then translate your subtitles into any language with a single click. Timings stay perfectly in sync, and every caption style, font, and word-by-word karaoke highlight carries over — so you can reach a global audience without re-editing a thing. More about translation →
Burn-in preview updates live. Edit a line, type a timestamp or stamp it from the player — and lay your covers along the timeline, where the lane you build is exactly what the export shows.
I had a 3-minute song and the lyrics in a Notes file. CaptionFit gave me an SRT in 18 seconds and I uploaded the video before my coffee was cold.
The lyric-paste feature is the unlock. Other tools mishear half my band's vocals — pasting the words means it just works.
Replaced an internal Python script we'd been duct-taping for a year. The keyboard shortcuts in the editor are chef's kiss.
No credit card required. All plans include transcription, MP4 export, the captions editor, multilingual fonts, and AI tools.
For trying it out — short clips and quick experiments.
For regular creators — weekly clips, social posts, podcasts.
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For power users and studios — full-length content with AI covers.
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All plans include transcription, MP4 export, the captions editor, the scene timeline, multilingual fonts, translation, and AI image & video generation. Tokens are one shared pool — spend them on whichever you need.
When you paste lyrics or a script, alignment is typically within 80–150ms of the spoken word — good enough that you'll rarely need to nudge anything. Audio-only transcription depends on the recording, but you can always paste a correction and re-align.
MP3, WAV, M4A, FLAC, AAC, OGG, plus video formats (MP4, MOV, WebM, MKV). Files can be up to 500 MB.
Nearly 100 languages — including English, Spanish, French, German, Mandarin, Hindi, Arabic, Japanese, and many more. Leave the language field on Auto-detect and CaptionFit will identify it for you.
Yes. After captioning, click Translate and pick from 100+ languages. CaptionFit translates every caption line while keeping the original timing perfectly in sync — so you can publish subtitles in multiple languages, download translated SRTs, or export a captioned video in any language. The original is kept, so you can produce several languages from one project.
Yes. Choose the "Suno link" option, paste your suno.com/song/… URL, and CaptionFit downloads the track, reads its lyrics, and captions it automatically — timed to the audio, with no transcription. Udio and Songer links work the same way. Then you can style the captions and export a 16:9, 9:16 or 1:1 lyric video.
Yes — a free account, and it takes about ten seconds. Continue with Google, or enter your email and paste back the 6-digit code. New accounts start on the Free plan automatically, with monthly tokens and no credit card. Signing in is also what lets your projects, cover library and exports follow you from one device to the next.
Yes — choose from 30+ fonts in a searchable dialog that shows your own captions in each one, set your own color, adjust size and vertical position. On paid plans you can also upload your own fonts. Everything is live-previewed before you commit to an export.
Karaoke mode highlights each word as it's spoken, keeping viewers locked in. Choose Color (the active word changes color), Stroke (it gets an outline), or Box (it sits on a highlighted block), and pick your own highlight color. Works in every format: 16:9, 9:16 and 1:1.
Three: 16:9 (1920×1080) for YouTube and the web, 9:16 (1080×1920) for Reels, TikTok, and Shorts, and 1:1 (1080×1080) for square feed posts. In 9:16 and 1:1 a picture of a different shape is scaled to fill the frame and centre-cropped; in 16:9 the whole picture is kept, with a blurred copy filling the gaps. Switching format is one click, and your captions, covers and timeline stay.
Yes. Describe the scene you want and CaptionFit generates it for you — a cover image in about 15–30 seconds, or a 4–15 second video background, which takes a few minutes. A video can start from your own image, or morph between a start and end frame you supply, and a Seamless loop option makes it repeat cleanly. No prompt in mind? Press ✨ Auto cover on the timeline and AI reads your captions, picks a scene that fits the song and generates one cover across the whole track. Generated images land in your library in exactly the shape of your 16:9, 9:16 or 1:1 project. Images cost a few tokens each; video is priced per second.
Yes — that is what the timeline is for. Place up to 50 scenes across the song: one for the intro, another for the drop, another for the outro. Drag a cover to move it, drag either edge to change how long it shows, and drag one over another to swap their order. Wherever no scene sits, the picture is black.
Yes — download a clean SRT any time, even before exporting. SRT files work directly in YouTube Studio, Adobe Premiere, DaVinci Resolve, and most other editing tools.
No — CaptionFit does not train any models on your audio or transcripts. Your files are stored only while your project exists; delete a project (or your account) and its files are removed from our servers. To produce captions we send your audio to specialist AI providers acting as our processing providers, solely to return your results.
Each file is its own project, so there is no batch upload yet. Long recordings such as lectures and audiobook chapters are fine — upload up to 500 MB, transcribe, and you get one clean SRT at the end.
Yes — CaptionFit and "Caption Fit" are the same product. The brand name is written as one word (CaptionFit), but many people search for it as two words. Either way, you're in the right place.
No card required, no setup call, no "book a demo." Free tier covers most one-off projects.