Information Density: AutoSubtitles – Signal Evidence & AI Readability

[IMG: AutoSubtitles logo]
[H1] The creative tool forvideo captions.
Generate AI subtitles in seconds, then style them with viral templates or design your own. Full customisation, 20+ languages, built for creators.Upload your videoFree to start, no signup required
[IMG: Rated 4.5 out of 5]
[H2] Powerful features, zero complexity
AI transcription, 25+ styles, full editor — all in your browser
[H3] AI-powered transcription
Upload any video and get accurate subtitles in seconds. Powered by state-of-the-art AI that handles accents, background noise, and multiple speakers.
[H3] 25+ style presets
Choose from ready-made styles like Classic, Neon, Karaoke, Street, and Corporate. One click to apply a complete look to your subtitles.
[H3] 20+ languages supported
Generate subtitles in English, Spanish, French, German, Portuguese, Japanese, and many more — with automatic language detection.
[H3] Full customization
Fine-tune every detail — font, size, color, outline, background, position, and alignment. Make your subtitles match your brand perfectly.
[H3] Subtitle editor and timing
Edit every word, adjust start and end times, merge or split segments. Full control over your subtitle timing and text.00:01Hey everyone, welcome back to the channel00:04Today we're going to talk about subtitles00:07Let me show you how easy it is00:10
[H2] How it works
From upload to export in under a minute
[H3] Upload your video
Drag and drop any video file — MP4, MOV, WebM and more.
[H3] Auto-generate subtitles
AI transcribes your audio in seconds. Accurate across 20+ languages.
[H3] Edit and style
Fix words, adjust timing, and choose from 25+ style presets or fully customize your own.
[H3] Export your video
Download your video with burned-in subtitles, ready to post anywhere.Upload your videoFree to start, no signup required
[H2] Who it's for
Made for creators, marketers, educators, and anyone publishing video online.
[H3] YouTube creators
Add subtitles to long-form videos to improve watch time, accessibility, and SEO. Burn captions directly into your video.
[H3] TikTok & Reels
Captions are essential for short-form content. Create clean subtitles for free, or upgrade for animated, styled captions that match trending formats.
[H3] Educators & Coaches
Make lessons and course content accessible. Generate accurate subtitles across multiple languages in seconds.
[H3] Freelancers & Agencies
Deliver captioned videos to clients without expensive software or a learning curve.
[H3] Social media managers
Caption content for multiple platforms with consistent styling. Upgrade to unlock custom fonts and reusable styles.
[H3] Podcasters
Turn audio into captioned video clips for social media. AI transcription handles different speakers and accents.
[H2] Free to start, pro when you're ready
No account needed. No trial period. Upgrade only if you want to.
[H3] Free
Everything you need to get startedAI subtitle generationAll subtitle styles & animationsUp to 720p exportVideos up to 10 minutesSmall AutoSubtitles.com watermark
[H3] Pro
Remove the watermark and unlock the extrasNo watermarkVideos up to 30 minutesAI subtitle translationSave and reuse custom stylesUpload your own fontsPriority support
[H3] Max
For longer videos and power usersEverything in ProVideos up to 1 hourUpload your videoFree to start, no signup required
[H2] Frequently asked questions
[H3] Is AutoSubtitles really free?
Yes. You can generate subtitles, edit them, and export your video for free. Free exports include a small AutoSubtitles.com watermark — upgrade to Pro to remove it.
[H3] Do I need to create an account?
No. AutoSubtitles works instantly in your browser with no signup, no login, and no account. Just open the site and start adding subtitles.
[H3] Is my video uploaded to a server?
No. Your video stays on your device and is processed locally in your browser. Only the audio track is sent for AI transcription and is deleted immediately after.
[H3] What video formats are supported?
AutoSubtitles supports MP4, MOV, WebM, and most common video formats. It works with any aspect ratio — landscape, portrait, or square.
[H3] What languages are supported?
AutoSubtitles supports 20+ languages with automatic language detection, including English, Spanish, French, German, Portuguese, Japanese, and more.
[H3] What does Pro include?
Pro removes the watermark from exports, extends the per-video length limit, unlocks AI subtitle translation, saved style presets, and custom font uploads. Pro starts at $5/month billed annually.Upload your videoFree to start, no signup required

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Features
[H1] AutoSubtitles features
Everything you can do with AutoSubtitles, from automatic captions to translation and styling. All in your browser, with no signup.Upload your videoNo account required, start in seconds
[IMG: Rated 4.5 out of 5]
Loved by 10,000+ creatorsWhy AutoSubtitles
[H2] Why creators choose AutoSubtitles
[H3] Total control over every caption
Customize every detail: fonts (upload your own), colors, outline, shadow, background, casing, spacing, alignment, position, and animation. Or start from 25+ presets.
[H3] Renders in your browser, fast
No waiting to upload your video to a server and no render queue. It stays on your device and captions render right in your browser, so you get your captioned video in seconds.
[H3] Viral animated captions
Word-by-word animations and karaoke highlighting in bold, readable styles built for TikTok, Reels, and Shorts.
[H3] Export however you need
Download a captioned video with burned-in subtitles, or export SRT, VTT, and TXT files to use anywhere.
[H3] Translate into 30+ languages
Translate your captions into 30+ languages with AI while keeping the timing intact.
[H3] Free to use, private
Use it free; a paid plan unlocks more. Your video file never leaves your device; only the audio is sent for transcription, then deleted.Browse
[H2] All features
AutoSubtitles is a free, browser-based caption tool. Every feature below works with no signup and no install, so you can upload a video and start right away.
[H2] Auto caption generator
Automatically generate captions for any video with AI. Edit the text and timing, then export captions or a captioned video. Free to start.
[H2] Subtitle translator
Translate subtitles into 30+ languages with AI, keeping timing intact, then export translated subtitles or a captioned video.
[H2] Animated captions
Create animated captions with viral-style presets, karaoke highlighting, and full styling control, then export them in your browser.
[H2] Add subtitles to video
Add subtitles to any video online for free. Generate captions with AI, burn them into the video, and export an MP4. No signup and no install required.
[H2] SRT generator
Generate SRT, VTT, and TXT subtitle files from any video with AI. Auto-transcribe, edit the timing, and download a formatted file. Free to start.
[H2] Custom caption fonts
Upload your own fonts and brand your captions. Combine custom fonts, colors, and saved style presets to keep every video on brand.
[H2] TikTok captions
Add viral-style animated captions to TikTok videos with AI. Edit the text and timing, then export a 9:16 MP4 ready to post. Free to start.
[H2] Instagram Reels subtitles
Add subtitles to Instagram Reels with AI, style them for vertical video, and export a 9:16 MP4 ready to share. Free to start.
[H2] YouTube subtitles
Generate YouTube subtitles with AI. Edit them, download an SRT to upload, or export a video with captions burned in. Free to start.Compare
[H2] Compare AutoSubtitles

Automatic captions
[H1] Auto caption generator
Upload a video and get accurate, editable captions in seconds. Review the text, then export a captioned video or a subtitle file.Upload your videoNo account required, start in seconds
[IMG: Rated 4.5 out of 5]
Loved by 10,000+ creatorsLast updated June 2026 In shortAutoSubtitles is a free browser-based auto caption generator. It transcribes your video audio with AI, lets you edit the wording and timing, and exports either a captioned video or a subtitle file. Free to start with no signup; no install needed.Overview
[H2] At a glance
Best forAdding captions to any video automaticallyInput formatsMP4, MOV, WebMOutputCaptioned MP4, or SRT / VTT / TXTLanguages20+ with automatic detectionAccountNot needed to startPriceFree to startWorkflow
[H2] How it works
1
[H3] Upload your video
Drag and drop an MP4, MOV, or WebM file. Your video stays on your device; only the audio is sent for transcription.2
[H3] Auto-generate captions
AI transcribes the audio in seconds with support for 20+ languages.3
[H3] Review and edit
Fix any words, adjust timing, and split or merge lines so captions read naturally.4
[H3] Export
Download a subtitle file or export a video with captions burned in.Capabilities
[H2] Features
[H3] AI transcription built for video
Turn speech into caption text in seconds, even with accents and conversational pacing.
[H3] Editable captions
Correct wording, timing, and line breaks before you export. The AI gets you close, you keep control.
[H3] Caption styling
Apply ready-made styles or customize fonts, colors, outlines, and position.
[H3] Fast, browser-side rendering
Exports render in your browser, not on a server, so there is no upload and no render queue. Nothing to install.Formats
[H2] Supported formats
Video inputMP4, MOV, WebMCaptioned video outputMP4 (captions burned in)Subtitle file outputSRT, VTT, TXTCaption languages20+ (auto-detected)Plans
[H2] Free vs Pro
Start free, upgrade only if you need more.CapabilityFreeProAutomatic caption generationYesYesEditable text and timingYesYesExport captioned videoYesYesHD and 4K exportNoYesAnimations and word highlightsNoYesAI translationNoYesCustom fontsNoYesSRT, VTT and TXT downloadNoYesSaved style presetsNoYesUse cases
[H2] Who it's for
[H3] YouTube creators
Caption long-form videos automatically, then export hardcoded captions or a subtitle file.
[H3] Short-form editors
Add captions to TikTok, Reels, and Shorts without a heavyweight timeline tool.
[H3] Educators
Caption lessons quickly to improve accessibility without manual transcription.Upload your videoNo account required, start in secondsFAQ
[H2] Frequently asked questions
[H3] Q.How do I automatically add captions to a video?
Upload your video to AutoSubtitles, let the AI generate captions, review the text, and export a captioned video or subtitle file. The whole process takes a few clicks, and no signup is required to start.
[H3] Q.Is the auto caption generator free?
Yes. You can generate, edit, and export captions for free with no signup. Pro adds HD and 4K export, animations, translation, and more.
[H3] Q.How accurate are the automatic captions?
The AI produces an accurate first draft from your audio, then you can correct any words and fine-tune the timing before exporting, so the final captions are as accurate as you need.
[H3] Q.What video formats are supported?
You can upload MP4, MOV, WebM, and most common video formats. Captioned videos export as MP4, and subtitle files export as SRT, VTT, or TXT.
[H3] Q.Does my video get uploaded to a server?
No. AutoSubtitles renders in your browser, so your video is never uploaded. Only the audio needed for transcription is sent for processing, and it is deleted immediately after. Browser-side rendering also makes exports fast, with no server render queue.Keep exploring
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