Cómo convertir subtítulos para YouTube: guía completa 2025

Why YouTube Subtitles Matter

YouTube is the world's second-largest search engine, with over 2 billion monthly users watching videos in hundreds of languages. Adding subtitles to your YouTube videos isn't optional—it's essential for growth.

Subtitles on YouTube increase:

• Video SEO by 80% - Searchable text helps YouTube understand your content
• Watch time by 40% - Viewers stay engaged longer with captions
• Global reach exponentially - Translated subtitles unlock international audiences
• Accessibility - 466 million people with hearing loss can access your content

The challenge? YouTube has specific format requirements, and creating or converting subtitles manually is time-consuming. This guide shows you the fastest way to get professional subtitles on your YouTube videos.

YouTube Subtitle Format Requirements

YouTube accepts three subtitle formats:

1. SRT (SubRip Text) - Recommended

The most universal format and easiest to work with. YouTube fully supports SRT files.

Example SRT format:

1
00:00:01,000 --> 00:00:04,000
Welcome to this YouTube tutorial

2
00:00:04,500 --> 00:00:08,000
Today we'll learn about subtitles

Pros: Universal compatibility, simple structure, works everywhere

Cons: No styling options

2. VTT (WebVTT) - Web Standard

HTML5 subtitle format with advanced features.

Example VTT format:

WEBVTT

00:00:01.000 --> 00:00:04.000
Welcome to this YouTube tutorial

00:00:04.500 --> 00:00:08.000
Today we'll learn about subtitles

Pros: Web standard, supports positioning and styling

Cons: Styling features don't work on YouTube

3. SBV (YouTube's Native Format)

YouTube's legacy subtitle format, rarely used anymore.

Example SBV format:

0:00:01.000,0:00:04.000
Welcome to this YouTube tutorial

0:00:04.500,0:00:08.000
Today we'll learn about subtitles

Pros: Native YouTube format

Cons: Not widely supported elsewhere, no advantages over SRT

Bottom line: Use SRT format for maximum compatibility and ease of use.

How to Convert Subtitles for YouTube (Fast Method)

Convert 10x faster with AI transcription - Instead of manually creating subtitles and then converting them, use AI to generate YouTube-ready subtitles automatically.

Method 1: AI Transcription (Fastest - 5 minutes)

1. Upload your YouTube video to Zorg Subtitle

• Download your published or unpublished YouTube video
• Or upload directly if it's not published yet

2. AI automatically transcribes

• Processes in under 5 minutes for most videos
• 95%+ accuracy for clear audio
• Automatically detects language

3. Review and edit (optional)

• Quick visual editor with timeline sync
• Fix any terminology or proper nouns
• Adjust timing if needed

4. Download in SRT format

• Select SRT (YouTube-compatible)
• Download instantly
• Ready to upload to YouTube

Time: 5-10 minutes total for a 30-minute video

Try AI transcription now →

Method 2: Manual Conversion (If you already have subtitles)

If you already have subtitle files in another format:

1. Go to Zorg Subtitle's converter

• Free with registered account
• No file size limits

2. Upload your subtitle file

• Supports VTT, ASS, SSA, SUB, STT, JSON formats
• Auto-detects source format

3. Select SRT as target format

• Ensures YouTube compatibility
• Preserves all timing information

4. Download converted SRT file

• Processing takes under 5 seconds
• Ready for YouTube upload

Time: Under 1 minute

How to Upload Subtitles to YouTube

After converting your subtitles to SRT format:

Upload via YouTube Studio

1. Go to YouTube Studio

• Navigate to youtube.com/studio
• Select your video from Content tab

2. Access subtitle editor

• Click "Subtitles" in left menu
• Select your video language

3. Upload SRT file

• Click "Add Language" if adding a new language
• Click "Upload file" → "With timing"
• Select your SRT file
• Click "Publish"

4. Verify subtitles

• Play your video
• Turn on captions (CC button)
• Check timing and accuracy

Sync issues? See troubleshooting section below.

Upload Multiple Languages

To reach global audiences, upload translated subtitles:

1. Translate your subtitles

• Use Zorg Subtitle's AI translation (100+ languages)
• Download each language as separate SRT files

2. Upload each language separately

• In YouTube Studio, click "Add Language"
• Select target language
• Upload corresponding SRT file
• Publish

3. YouTube automatically shows correct language

• Viewers see subtitles in their language
• Dramatically increases international views

Pro tip: Prioritize Spanish, Hindi, Portuguese, and Arabic for maximum reach.

YouTube Subtitle Best Practices

Follow these guidelines for professional YouTube captions:

Timing and Readability

• 2-7 seconds per subtitle - Viewers need time to read
• Maximum 2 lines per caption - Prevents screen clutter
• 42 characters per line max - Optimal readability
• Start on speech, end on silence - Natural reading rhythm

Writing Style

• Use proper capitalization - Not ALL CAPS unless shouting
• Include [sound effects] - Helps deaf/hard-of-hearing viewers
• Identify speakers - Use "Speaker:" or name for multi-person videos
• Avoid covering key visuals - YouTube places captions at bottom, but keep content clear

Technical Requirements

• UTF-8 encoding - Ensures international characters display correctly
• No formatting tags - YouTube strips HTML/styling from SRT
• Accurate timestamps - Use milliseconds (00:00:01,000 format)
• Maximum file size: 10MB - Practical limit for even very long videos

Common YouTube Subtitle Problems (And Solutions)

Subtitles Out of Sync

Problem: Captions appear too early or late.

Solutions:

• If consistently offset: Re-sync in Zorg Subtitle editor before exporting
• If gradually drifting: Check your video's actual framerate matches subtitle assumptions
• Quick fix: Use YouTube Studio's timing editor to shift all captions

Characters Display as "?"

Problem: Special characters show as question marks or gibberish.

Solution: Ensure SRT file uses UTF-8 encoding. Zorg Subtitle automatically saves in UTF-8, preventing this issue.

YouTube Rejects Subtitle Upload

Problem: "Invalid file format" error.

Solutions:

• Verify file has .srt extension (not .txt)
• Check for malformed timestamps (use HH:MM:SS,mmm format)
• Remove any BOM (Byte Order Mark) from file start
• Use Zorg Subtitle to re-export—guarantees valid format

Subtitles Don't Appear

Problem: Upload succeeds but captions don't show in video.

Solutions:

• Wait 5-10 minutes—processing can be delayed
• Check you published (not just saved) the subtitles
• Verify you're testing with CC button turned on
• Confirm video language matches subtitle language

Auto-Generated Captions Competing

Problem: YouTube's auto-captions override your uploaded subtitles.

Solution: In YouTube Studio, disable auto-generated captions for that language. Your uploaded SRT will then become the default.

YouTube SEO Benefits of Subtitles

Subtitles directly impact your video's discoverability:

How YouTube Uses Subtitle Text

• Indexes every word - Subtitles become searchable content
• Improves recommendations - Algorithm understands video topic better
• Enables translations - Community/auto-translate features work better
• Accessibility signals - YouTube may favor accessible content

Optimizing Subtitles for Search

• Include target keywords naturally - If video is about "video editing," say it
• Use full phrases - "How to edit videos" not just "editing"
• Spell out acronyms first use - "Search Engine Optimization (SEO)"
• Accurate transcription - Errors hurt more than they help

Measuring Subtitle Impact

Track these metrics in YouTube Analytics:

• Traffic from YouTube search - Should increase 20-50% with subtitles
• Average view duration - Subtitles typically add 12%+ watch time
• Audience geography - Translated subs attract international viewers
• Accessibility views - Shows subtitle usage percentage

Batch Converting Subtitles for Multiple Videos

YouTube creators often need subtitles for dozens or hundreds of videos.

Efficient Workflow

1. Download all YouTube videos

• Use YouTube Studio bulk download
• Or youtube-dl for channel backup

2. Batch upload to Zorg Subtitle

• Upload up to 50 videos at once
• AI processes all simultaneously
• Download all SRT files when ready

3. Batch upload to YouTube

• Use YouTube Studio bulk subtitle upload
• Or YouTube API for programmatic upload

Time savings:

• Manual: 60 minutes per video × 50 videos = 50 hours
• AI batch: 5 hours total (mostly automated)

That's 10x faster.

Start batch transcription →

Converting YouTube Auto-Captions to Editable SRT

YouTube's auto-generated captions are often inaccurate. Here's how to improve them:

Download YouTube's Auto-Captions

1. Go to YouTube Studio

2. Select your video

3. Click Subtitles

4. Click ⋮ (three dots) → Download → .srt

Edit and Fix Errors

1. Upload SRT to Zorg Subtitle

2. Use AI to improve accuracy

• Re-transcribe from video (more accurate than YouTube)
• Or manually edit downloaded captions

3. Export corrected SRT

4. Re-upload to YouTube

This gives you the convenience of auto-captions with professional accuracy.

Subtitle Formats for Different YouTube Use Cases

For Regular YouTube Videos

Format: SRT

Why: Universal compatibility, accepted everywhere

For YouTube Live Streams

Format: SRT or WebVTT via encoder

Why: Real-time captioning requires encoder integration

For YouTube Shorts

Format: Burned-in subtitles (part of video)

Why: Shorts don't support uploaded SRT files—must be embedded

How to add burned-in subtitles for Shorts:

1. Upload video to Zorg Subtitle

2. AI transcribes automatically

3. Export video with subtitles burned in

4. Upload final video to YouTube Shorts

For YouTube Premieres

Format: SRT uploaded before premiere

Why: Captions must be ready when premiere starts

Converting Subtitles from Other Platforms to YouTube

From TikTok to YouTube

TikTok uses burned-in captions, not separate subtitle files.

Solution: Re-transcribe the video using Zorg Subtitle AI, then download as SRT for YouTube.

From Vimeo to YouTube

Vimeo supports VTT and SRT.

Process:

1. Download subtitles from Vimeo (usually VTT)

2. Convert VTT to SRT using Zorg Subtitle (if needed)

3. Upload SRT to YouTube

From Facebook to YouTube

Facebook uses SRT files.

Process:

1. Download SRT from Facebook video settings

2. Upload directly to YouTube (usually works as-is)

3. If issues, run through Zorg Subtitle to validate format

From Professional Editing Software

Premiere Pro, Final Cut Pro, and DaVinci Resolve export various subtitle formats.

Recommended workflow:

• Export as SRT from editor (most editors support this)
• If editor only exports proprietary format, convert via Zorg Subtitle
• Verify timing after conversion

How AI Transcription Beats Manual YouTube Subtitles

Let's compare the real costs:

Manual Transcription

• Time: 60 minutes for 10-minute video (6:1 ratio)
• Cost: Your time or $1.50/minute professional service
• Accuracy: 95-98% (human) but slow
• 10-video channel: 600 minutes = 10 hours of work

AI Transcription with Zorg Subtitle

• Time: 5 minutes for 10-minute video
• Cost: $9/month unlimited
• Accuracy: 95%+ for clear audio
• 10-video channel: 50 minutes total

Result: AI is 12x faster and costs 94% less than professional services.

Convert 10x faster with AI transcription - Try it free →

Frequently Asked Questions

What subtitle format does YouTube prefer?

YouTube accepts SRT, VTT, and SBV. SRT is recommended for maximum compatibility and ease of use.

Can I upload subtitles to YouTube without YouTube Studio?

Yes, you can use the YouTube Data API v3 for programmatic subtitle upload, useful for batch processing many videos.

How long does YouTube take to process uploaded subtitles?

Usually 5-10 minutes, though complex files or high YouTube traffic can delay this to an hour.

Do YouTube subtitles help with monetization?

Indirectly yes—subtitles increase watch time and engagement, which are key monetization factors. Accessibility also expands your potential audience.

Can viewers download my YouTube subtitles?

Yes, viewers can download subtitles from any YouTube video with captions using browser extensions or online tools. Consider this when adding sensitive information.

Get Started with YouTube-Ready Subtitles

Ready to add professional subtitles to your YouTube videos?

Option 1: Convert existing subtitles - Free converter →

Upload any subtitle format, download YouTube-compatible SRT in seconds.

Option 2: Create subtitles with AI - Try AI transcription →

Convert 10x faster with AI transcription - Upload your video, get accurate SRT files in minutes, not hours.

Your first conversion is free. No credit card required.