AutoSubtitles
AutoSubtitles

Free Auto Subtitle Generator for Videos

Generate subtitles automatically, edit text and word timing inline, and style animated captions online. Start free—no signup required.

Transcription Language

Start free with videos up to 10 mins & watermarked 720p exports • Upgrade for watermark-free 1080p/4K, SRT/VTT downloads & AI translation

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Auto Subtitles — Browser-Based Caption Studio

Add Animated Captions to TikTok, Reels & YouTube Shorts

Our auto subtitle generator turns speech into accurate, word-by-word animated captions in seconds. Pick from 28+ caption styles, auto-detect 100+ languages, and start free with videos up to 10 minutes and 720p exports—no signup required.

Built for short-form and long-form creators alike, Auto Subtitles pairs AI speech-to-text transcription with a multi-track video editor that runs in your browser. Burn subtitles into your video locally without waiting in cloud render queues, fix the transcript inline, or upgrade to export watermark-free 4K video and SRT or VTT subtitle files.

Add Subtitles to Your VideoView Pricing Plans
100+ Languages Detected Instantly
28+ Animated Caption Styles
Local Browser Video Rendering — No Signup
00:02.16 → 00:02.64LIVE WORD SYNC
🔥Karaoke Pop
CAPTIONSTHATHOOKVIEWERSINSTANTLY

Click a preset below to preview live word-by-word animation

[Auto Subtitles — Browser-Based Caption Studio]

Everything You Need in an AI Auto Subtitle Generator

Fast AI transcription, 28+ animated caption presets, and a multi-track video editor—all in one browser tab.

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[00:02.15]Karaoke PopHighlight Pill BoxWave Motion

AI Speech-to-Text Transcription (100+ Languages)

The auto subtitle generator transcribes spoken audio into timed, word-level subtitles in seconds, handling background noise, multiple speakers, and regional accents across 100+ languages with precise timestamp alignment.

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POPPILLNEON

28+ Animated Video Caption Presets

Choose from 28+ ready-made caption styles—including Karaoke word highlights, Hormozi Bold, Neon Pulse, Pill Box, Wave, and Editorial Serif. Customize font families, text casing, stroke outlines, drop shadows, and background boxes in one click.

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Full Transcript & Multi-Track Timeline Editor

Edit subtitle text inline, drag start and end boundaries, split or merge caption segments, and remove awkward silences—full timeline control in a single subtitle editor and video studio.

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AI Subtitle Translator (30+ Languages)

Expand your global reach on Pro and Max plans. Translate captions into Spanish, Chinese, Japanese, French, German, Portuguese, and 30+ other languages while keeping exact word synchronization.

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1-Click Silence Removal & Safe-Zone Layout

Detect and close silent gaps between spoken lines to keep short-form pacing tight. Adjust vertical safe-zone positioning (Top, Middle, Bottom), words per line, and custom colors for a consistent look.

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Video TrackCaptionsAudio & BGM
1080×1920 • 60 FPS

Local Browser Video Rendering & SRT / VTT Export

Unlike cloud tools that make you upload gigabytes of raw footage and wait in queues, Auto Subtitles burns captions into MP4 and WebM videos locally on your device. Pro plans also unlock clean SRT, VTT, and TXT downloads.

[Simple 3-Step Workflow]

How to Add Subtitles to a Video in 3 Steps

Create accurate, timed transcripts and styled captions right in your browser—no software to install and no account required.

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Step 0100:00.00

Upload Your Video or Load a Sample

Drag and drop any MP4, MOV, or WebM file into the editor above, or click 'Load Demo Video' to try it right away. Video decoding and canvas preview run locally in your browser, so there's no waiting for a full-video upload.

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AI Transcription & 28+ Caption Styles

The auto subtitle generator detects 100+ languages and aligns every word to the millisecond. Apply 28+ dynamic presets—including Karaoke Pop, Hormozi Bold, Neon Glow, Pill Box, and Minimal Clean—or customize fonts, colors, outlines, and screen placement.

Step 0300:03.00

Edit Timeline & Export MP4 or SRT/VTT

Fix typos inline, adjust start and end timestamps, and split or merge caption blocks. Render your video with burned-in open captions in your browser (free 720p with watermark, or Pro watermark-free 1080p/4K with SRT, VTT, TXT downloads and 30+ language translation).

[Built for Every Video Workflow]

Why Creators Add Captions to Their Videos

Many viewers scroll social feeds with the sound off. Timed captions and on-screen text keep them watching from the first second—and make your videos accessible to deaf and hard-of-hearing audiences.

USE CASE 01

TikTok, Reels & Shorts Creators

Use the auto subtitle generator to add word-by-word karaoke highlights, pop-up animations, and contextual emojis designed for 9:16 vertical clips that keep viewers watching longer.

USE CASE 02

YouTube & Podcast Producers

Turn interviews, video podcasts, and tutorials into searchable transcripts. Pro plans export frame-accurate SRT, VTT, and TXT closed caption files ready for YouTube.

USE CASE 03

Global Brands & Video Marketers

Localize ad creatives and product demos for international audiences. Pro and Max teams can translate captions into 30+ languages while keeping brand fonts and layout styles.

USE CASE 04

Educators & Online Course Creators

Make lectures, webinars, and training videos accessible to every student with clear readability templates and fast browser-based rendering.

Add Subtitles to Your Video
[CREATOR PRICING]

Simple, Creator-Friendly Pricing

Start free in your browser with local rendering. Upgrade for watermark-free 4K exports, SRT downloads, and 30+ language translation.

Free

$0/mo

Try the full editor, watermarked

  • AutoSubtitles watermark on export
  • All 28+ subtitle styles & animations
  • Up to 720p export quality
  • Videos up to 10 mins
  • Word-level AI auto transcription

Pro

$9/mo

The full editor, no watermark

  • No watermark & 1080p HD / 4K quality
  • Videos up to 30 mins
  • AI subtitle translation (34+ languages)
  • Download SRT, VTT & TXT files
  • Save custom styles & upload fonts
  • Priority rendering & customer support

Max

$15/mo

Everything in Pro, taken further

  • Everything in Pro
  • Videos up to 1 hour (60 mins)
  • Expanded monthly AI translation quota
  • Priority rendering & dedicated support
  • 4K Ultra HD unrestricted exports
  • Early access to new viral presets
100% Local Browser Rendering
Instant Pro Activation
Cancel Anytime in 1 Click

Auto Subtitle Generator FAQ

Answers about generating subtitles, styling animated captions, free vs. Pro limits, and exporting videos in your browser.

Unlike traditional cloud video editors, Auto Subtitles decodes and renders your video locally inside your web browser using HTML5 Canvas and WebCodecs. Your full video file stays on your device during editing and rendering, while a lightweight audio stream is sent to our transcription provider to generate timed subtitles.

No signup or software installation is required to start. On the free tier, you can upload videos up to 10 minutes, generate subtitles automatically, apply all 28+ caption styles, and export watermarked 720p videos. Upgrading to Pro or Max unlocks longer videos (30–60 minutes), watermark-free 1080p/4K exports, standalone SRT/VTT/TXT downloads, and AI translation.

You can export MP4 or WebM videos with burned-in open captions in 9:16, 16:9, 1:1, or 4:5 aspect ratios (720p on Free, up to 1080p HD and 4K on Pro and Max). Pro and Max users can also download standalone SRT, VTT, and TXT subtitle files with exact timestamps for YouTube, Vimeo, or Premiere Pro.

You get instant access to 28+ animated caption styles and presets—including Karaoke word-by-word highlights, Hormozi Bold, Neon Pulse, Pill Box, Wave Bounce, Minimal Clean, and Editorial Serif. Inside the editor, you can customize fonts, sizes, colors, stroke outlines, drop shadows, text casing, and vertical positioning.

Traditional subtitle tracks help viewers follow spoken dialogue or translations, while social captions include dynamic on-screen text and visual emphasis designed for muted feeds. Auto Subtitles supports both: clean bottom text with SRT export for long-form videos, and animated word-by-word captions for TikTok, Reels, and Shorts.

The speech recognition engine detects and transcribes over 100 spoken languages and regional accents—including English, Spanish, Mandarin Chinese, Japanese, Korean, French, German, Arabic, and Hindi. Pro and Max subscribers can also translate transcripts into 30+ target languages while keeping word timing synced.

Yes. Alongside automatic speech-to-text, the auto subtitle generator includes a transcript and timeline editor that lets you fix spelling inline, adjust start and end timestamps to the millisecond, split or merge segments, and close silent pauses.

Yes. The studio is built for short-form vertical video creators. Switch to the 9:16 canvas with TikTok and Reels safe-zone guides, apply word-by-word karaoke highlights, add contextual emojis, and export smooth 60fps videos.
Auto Subtitles — Browser-Based Caption Studio
1080×1920 • 60FPS

Try the Free Auto Subtitle Generator Now

No signup, no install—add subtitles to your first video in minutes. Upgrade anytime for 4K exports, SRT/VTT downloads, and AI subtitle translation.

Open the Auto Subtitle Generator