AutoSubtitles is a browser-based subtitle generator for video creators. Drop in an MP4, MOV, or WebM file and the AI transcribes the audio in 20+ languages, then you edit the wording, fix timings, and apply caption styles from 25+ presets. Your video never leaves your device since rendering happens locally in the browser; only the audio track is sent for transcription and deleted afterward. Export a captioned MP4 or an SRT, VTT, or TXT file. No signup or account is required to start.

• AI Transcription in 20+ Languages: Audio is transcribed in seconds with automatic language detection, covering English, Spanish, French, German, Portuguese, Japanese and more. The model is built to handle accents, background noise, and multiple speakers.
• Full Word-Level Editing: Change any word, drag start and end times, and merge or split segments. You get control over timing down to the word before exporting.
• 25+ Caption Style Presets: One-click looks like Classic, Neon, Karaoke, Street, and Corporate. You can also customize font, color, outline, shadow, background, casing, spacing, alignment, and position.
• Animated Captions: Per-word karaoke highlighting plus fade, pop, slide, reveal, and flip effects for short-form social video.
• AI Subtitle Translation: Translate finished subtitles into 30+ languages while keeping per-line timing intact. The original captions stay on a separate layer.
• Local Browser Processing: Your video file stays on your device and renders in the browser. Only the audio is sent for transcription, then deleted, so there is no upload wait or render queue.
• Multiple Export Options: Burn captions into an MP4 or download SRT, VTT, or TXT files. SRT uploads directly into YouTube Studio.

• Genuinely Fast: Skipping the upload and render queue means captions appear in seconds rather than minutes, which matters when you are cutting several clips a day.
• Low Friction to Try: No signup, no credit card, no download. Early Trustpilot reviewers point to the ease of adding animated captions as the main draw.
• Broad Format Support: Works with MP4, MOV, WebM and any aspect ratio, so vertical Reels and landscape YouTube cuts use the same workflow.
• Video Stays on Your Device: AutoSubtitles processes the video locally in your browser. Only the audio needed for AI transcription is sent for processing and then deleted.

• Audio Leaves the Device for Transcription: Video processing and rendering happen locally, but the audio track is sent to the transcription service and deleted after processing. This may matter for sensitive recordings that must remain fully offline.
• Key Features Sit Behind Pro: Translation, HD and 4K export, animations, saved presets, and custom font uploads all require a paid license, so the free tier is closer to a basic captioning tool.

• Short-Form Social Clips: Cut a vertical clip for TikTok, Reels, or Shorts and burn in animated word-by-word captions. Burned-in captions always display, even in autoplay feeds where separate subtitle tracks get stripped.
• Podcast Repurposing: Turn podcast recordings into captioned video clips or generate subtitle files from recorded episodes. AutoSubtitles can transcribe the audio and lets you edit the resulting captions and timing.
• YouTube Accessibility: Generate an SRT file and upload it directly in YouTube Studio instead of relying on YouTube's auto-captions. You get editable text and cleaner timing, which also helps search indexing.
• Multilingual Reach: Caption a video once, then translate the subtitles into 30+ languages with timing preserved. Useful for course creators and marketers publishing the same asset across regions.
• Client Work with Confidentiality Concerns: Since the video renders locally, footage under NDA never uploads to a vendor's servers. Agencies handling unreleased campaign material get faster turnaround without a file transfer step.
• Web Video Embedding: Export VTT files for HTML5 players so viewers can toggle subtitles on and off on your own site.