AI Subtitle Generator — Auto Captions In 50+ Languages
Auto-generate accurate captions in 50+ languages. Edit timing inline, translate to any target language, style with the text engine, and export to SRT, VTT, or ASS.
What it is and why it matters
Captions are no longer optional. Most social viewers watch muted, every accessibility guideline requires them, and search engines lean on caption text to index video content. Skrrol AI's subtitle generator runs an on-device speech-to-text model that produces accurate captions in over fifty languages, with frame-accurate timing snapped to natural phrase boundaries. Click Generate and a complete caption track appears on the timeline within seconds for short clips, or under a minute for typical YouTube long-form. Each caption is editable — fix a misheard word, adjust timing by a frame, merge two short captions into one, split a long caption — directly in the canvas inspector with no separate caption editor required.
Translation is built in. Generate captions in the source language, then translate to any of fifty plus targets — English, Spanish, French, German, Portuguese, Japanese, Chinese, Korean, Arabic, Hindi, and more — to deliver multi-language versions of the same video. The styling lives in the same text overlay engine the rest of the editor uses, so captions can carry your brand font, color, drop shadow, and positioning. Export options cover the standard formats: SRT for YouTube and most platforms, VTT for HTML5 video, ASS for advanced styled captions, or burned-in subtitles baked into the rendered MP4 for platforms that don't support sidecar files. The whole pipeline runs locally — no audio uploads, no third-party transcription service, no privacy compromise on sensitive recordings.
How it works
- 1
Drop your clip on the timeline
Add the video or audio clip you want captioned. The subtitle generator works on any clip with audio.
- 2
Click Generate Captions
Open the AI Subtitle panel and click Generate. Pick the source language (or use auto-detect) and the model produces a caption track.
- 3
Review and edit
Each caption appears as a clip on the subtitle track. Click any caption to edit its text or drag the edges to adjust timing.
- 4
Translate (optional)
Click Translate, pick a target language, and the entire track is rewritten into the target language with timing preserved.
- 5
Style the captions
Apply font, color, drop shadow, and positioning the same way you would for any text overlay. Save as a project preset for consistency.
- 6
Export as SRT, VTT, ASS, or burned-in
Export the caption track as a sidecar file, or render the video with captions baked into the picture for platforms that need it.
Benefits
On-device AI transcription
Captions generate from a model running locally — audio stays on your device, no cloud transcription service.
50+ language support
Generate in major world languages and translate between any pair, all within the same panel.
Frame-accurate timing
Captions snap to natural phrase boundaries with frame-level precision; nudge by a frame in either direction as needed.
Multiple export formats
SRT, VTT, ASS sidecar, or burned-in to the picture — pick whichever your platform prefers.
Who uses it
Social media editors
Add muted-feed captions to every Reel, TikTok, and Short to keep the engagement rate high.
YouTube long-form creators
Auto-generate accurate captions, edit any errors inline, and improve search and accessibility on every video.
Course and tutorial creators
Provide caption tracks for students who prefer reading or who watch in noisy environments.
Multilingual brand teams
Translate one caption track into multiple languages and deliver localized versions of the same video at scale.
Documentary editors
Add captions for archival interviews, foreign-language source, and accessibility-required deliveries.
Frequently asked questions
How accurate is the transcription?
Word-level accuracy is typically 90 to 97 percent on clean audio. Noisy or accented audio benefits from manual review of every caption.
Does my audio get uploaded for transcription?
No. The model runs locally in your browser. Audio never leaves your device for caption generation.
What languages are supported?
More than 50 languages including English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Korean, Mandarin Chinese, Arabic, Hindi, Turkish, Polish, Dutch, and more.
Can I export burned-in captions?
Yes. Choose Burn In Captions when exporting and the captions render directly into the picture, with full font and style control.
Does it handle multi-speaker dialog?
The model transcribes everything; speaker labels are not auto-attributed. Add speaker tags manually in the caption editor.
Related editor features
Text Overlays — Lower Thirds, Captions, And Watermarks
Add lower thirds, captions, titles, and watermarks with full typographic control. Custom fonts, animated reveals, brand-color presets, and reusable text styles.
Animated Titles — Kinetic Typography In The Browser
Word-by-word reveals, character stagger, motion presets, and beat-synced animation. Build hooky title sequences without opening a motion graphics tool.
Multi-Track Audio Mixer With Auto Ducking
Balance dialog, music, and effects on a real mixer. Per-track levels, pan, solo, mute, and AI-powered ducking that drops music under voice automatically.
AI Noise Reduction — Clean Voice From Any Recording
Strip hum, hiss, fan noise, and room tone from any audio. AI-powered spectral denoise plus a manual noise gate, both running locally in your browser.
Try it in the Skrrol AI editor
Skrrol is a browser-native video studio. Open the editor in your browser, drop in your media, and use this feature alongside the rest of the timeline. Free, no install, your files stay on your device.