Free trial
A free tier provides 60 one-time credits (about 60 minutes) with no credit card required. Video exports carry a watermark and subtitle file export requires a purchase.
Learn moreCaptioner.io
Browser-based AI subtitles for video creators, with editing and translation
Beginner
What is Captioner.io?
Captioner.io is an AI transcriber tool. AI subtitle generator that transcribes video in 98+ languages, aligns timestamps, supports translation and subtitle editing in the browser, and exports SRT, VTT, SBV or a video with burned-in captions.
Captioner is a browser-based subtitle tool aimed at people who publish video and need captions without a manual transcription pass. A video file is uploaded, speech is converted to text by an AI model fine-tuned for subtitles, and the result opens in an editor where text, timing and styling can be adjusted before export. The site states accuracy of 98 percent or higher across more than 98 languages, with English and Chinese performing best and a custom-tuned model for Cantonese. Uploads are capped at 2 hours and 2 GB per file, and MP4 and MOV are the supported formats. The workflow is built around editing rather than pure automation. Timestamps are aligned beyond the raw transcription output, and word-level timings are exposed for finer control. If a transcript already exists, it can be imported and Captioner aligns it to the audio, which is close to YouTube's auto-sync but handled by the tool itself. A voice extraction step separates speech from background music, so clean audio is helpful but not mandatory. Finished work leaves in SBV, SRT or VTT for use in editing software, or as a rendered video with burned-in subtitles in a chosen font style, up to 1080p on lower tiers and 4K on the top plan. The audience is individual creators, translators and small teams publishing to YouTube or similar platforms. Pricing is credit-based: 60 one-time credits on the free tier, 300 monthly credits for $10, 1,200 monthly credits for $20, or a $7 one-week pass with 120 permanent credits and temporary Creator access. The free tier watermarks video exports and blocks subtitle file downloads. Speed is the deliberate trade-off: roughly 5 to 6 minutes to transcribe a 30-minute video, and 5 to 10 minutes to render a 5-minute one. Compared with general transcription services, Captioner leans harder into subtitle timing and styling, though the absence of direct platform publishing or an API means files still move by hand.
How do you use Captioner.io?
1Create an account and open the editor
Sign up on the site and land in the dashboard. The free tier starts with 60 one-time credits, enough for roughly 60 minutes of transcription or translation.2Upload your video
Submit an MP4 or MOV file up to 2 hours and 2 GB. MP4 is recommended for the best transcription results.3Wait for transcription and alignment
The model transcribes speech and aligns timestamps to the audio. Expect around 5 to 6 minutes for a 30-minute video.4Edit subtitles and translate if needed
Correct text and timing in the editor, or import an existing transcript to have it aligned. Subtitle translation is available for a long list of target languages.5Export subtitles or a captioned video
Download SBV, SRT or VTT files for your editing software, or pick a font style and render the video with subtitles burned in.6Check language coverage before committing
Review the supported languages documentation, since accuracy differs by language and some languages are better supported than others.
Pros and cons
Pros
- Strong stated accuracy above 98 percent with word-level timestamps for precise subtitle alignmentAI
- Import and align an existing transcript to save a transcription passAI
- Built-in voice extraction keeps speech legible for transcription even with background musicAI
- Exports SBV, SRT and VTT plus rendered video with burned-in subtitlesAI
- One-week pass at $7 gives short projects a low-cost entry without a subscriptionAI
Cons
- Processing is slow by design: about 5 to 6 minutes for a 30-minute video, and 5 to 10 minutes to render a 5-minute clipAI
- Free tier watermarks video exports and withholds subtitle file downloads, so real use requires paymentAI
- Uploads are limited to 2 hours and 2 GB, and only MP4 and MOV are acceptedAI
- No direct publishing to YouTube or other platforms, so files must be moved manuallyAI
- Accuracy varies by language despite the broad language countAI
How much does Captioner.io cost?
Pricing
Free: 60 one-time credits, watermarked video, no subtitle downloads. Basic: $10/month or $60/year for 300 monthly credits, 1080p and SRT/VTT exports. Creator: $20/month or $120/year for 1,200 monthly credits, 4K and priority rendering. One-Week Pass: $7 once for 120 permanent credits and 7 days of Creator features.
Learn moreSupport
Support is reachable by email at support@captioner.io, and an in-dashboard chat bubble is offered for processing delays. Subscriptions can be cancelled from the Billing section of the dashboard.
Features
Transcription in 98+ languages with 98 percent or higher stated accuracy, precise and word-level timestamps, import and alignment of existing transcripts, background voice extraction, subtitle translation, in-browser editing of text and timing, SBV/SRT/VTT export, and video rendering with burned-in subtitles up to 4K.
Frequently asked questions about Captioner.io
How much does Captioner.io cost?
Free: 60 one-time credits, watermarked video, no subtitle downloads. Basic: $10/month or $60/year for 300 monthly credits, 1080p and SRT/VTT exports. Creator: $20/month or $120/year for 1,200 monthly credits, 4K and priority rendering. One-Week Pass: $7 once for 120 permanent credits and 7 days of Creator features.Does Captioner.io offer a free trial?
A free tier provides 60 one-time credits (about 60 minutes) with no credit card required. Video exports carry a watermark and subtitle file export requires a purchase.How do you use Captioner.io?
The walkthrough on this page covers 6 steps: 1. Create an account and open the editor 2. Upload your video 3. Wait for transcription and alignment 4. Edit subtitles and translate if needed 5. Export subtitles or a captioned video 6. Check language coverage before committing.What platforms does Captioner.io support?
Captioner.io is available on Web App.What are the limitations of Captioner.io?
Processing is slow by design: about 5 to 6 minutes for a 30-minute video, and 5 to 10 minutes to render a 5-minute clip. Free tier watermarks video exports and withholds subtitle file downloads, so real use requires payment. Uploads are limited to 2 hours and 2 GB, and only MP4 and MOV are accepted.
Status
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Added10/21/2026
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Pricing
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