Add Subtitles to Video Online Free

Burn SRT subtitles or create them manually with our built-in editor

No signup • No watermark • 100% Private • Completely Free

See the Result

Before
Video without captions (inaccessible to deaf viewers)
→
After
Permanently subtitled video, ready for YouTube

Upload Video

MP4, WebM, MOV, AVI — drag & drop or click

Subtitle Method

Auto-Generate Subtitles

How it works: The tool plays your video and uses your browser's built-in speech recognition to transcribe the audio in real-time. No data is sent to any server — everything stays in your browser. Requires microphone permission (even though it reads from the video).

SRT format reference

1
00:00:01,000 --> 00:00:04,000
Hello, this is the first subtitle.

2
00:00:05,500 --> 00:00:09,000
This is the second subtitle.

Why Use Our Free Subtitle Tool?

Subtitle Privacy

Burn SRT subtitles into videos using FFmpeg WebAssembly locally. Your video content and subtitle files stay on your device during processing.

Professional Subtitle Styling

Customize fonts, colors, sizes, and positioning for broadcast-quality results. Perfect for YouTube videos, educational content, or accessibility compliance.

Unlimited Subtitle Burning

Add subtitles to entire video series without restrictions. No limits on video length, subtitle count, or number of videos processed per day.

Direct Subtitle Access

Start adding subtitles without account creation. No registration forms, no email confirmation - just upload video and SRT file.

How to Use

1

Upload Your Video File

Drag and drop or click to select your video (MP4, MOV, or WebM).

2

Add Subtitles

Upload an SRT file or use our manual editor to create subtitles with timestamps.

3

Customize & Process

Adjust font size, color, and position, then click Burn Subtitles.

Frequently Asked Questions

Is this subtitle tool really free?

Yes, completely free. No hidden fees, no subscriptions, no credit card required.

Do I need to create an account?

No. Start immediately without signup or email verification.

Are my videos uploaded to your servers?

No. All processing happens in your browser. Files never leave your device.

What subtitle format is supported?

We support SRT (SubRip) format, the most common subtitle format used by YouTube, Netflix, and other platforms.

Are the subtitles permanent or removable?

The subtitles are permanently burned into the video pixels. They cannot be turned off, making them perfect for social media sharing.

How do I create an SRT file?

You can create SRT files with text editors, subtitle software like Aegisub, or download them from YouTube Studio for your own videos.

How long does subtitle burning take?

Processing time depends on video length and size. A 5-minute video typically takes 2-3 minutes to process.

Can I create subtitles without an SRT file?

Yes! Use our manual subtitle editor to create subtitles directly in the browser. Just enter the text and timestamps for each subtitle.

💡Pro Tip: When to Use This Tool

  • •Burned-in subtitles (hardcoded) cannot be turned off — ideal for sharing on platforms that don't support SRT
  • •Use white text with a 2px black outline for readability on any background
  • •YouTube auto-generates subtitles — download the SRT from YouTube Studio and burn them in for guaranteed accuracy

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