Convert WEBM to SRT

Generate perfectly-timed SRT subtitle files from your WebM videos. Create professional subtitles for YouTube content, OBS recordings, and HTML5 web video projects.

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About This Format

Understanding WEBM files

What is a WEBM file?

Open web video format for HTML5 and streaming

WEBM is an open, high-quality video standard that is usually used for delivering online videos using the HTML tag. WEBM is a container file format: the video stream is usually compressed with the VP8 codec and the audio stream is compressed with the Ogg Vorbis codec. The WEBM container format itself is based off of the popular Matroska container (MKV files). Since WEBM is an alternative to the patented H.264 and MPEG4 formats and widely supported by most major web browsers, it is used in both commercial and non-commercial applications.
The WEBM file format was created by Google to store video content and implement compression standards optimized for video streaming over broadband and mobile internet connections. Thus, royalty-free video compression technologies were used (VP8/VP9 and Ogg Vorbis). In addition, WebVTT subtitle tracks can we included within a WEBM file. WEBM files are also widely supported by Chrome, Safari, Firefox, and Internet Explorer.

Common Uses

  • YouTube videos
  • HTML5 web video
  • Web streaming
  • Browser-based video

Audio Quality

High-quality open format backed by Google

Transcription Tips for WEBM

  • Very common web format - excellent support
  • VP8/VP9 video with Vorbis/Opus audio
  • Optimized for streaming clarity

Where WEBM Files Come From

  • YouTube downloads
  • Web video platforms
  • Screen recording software
  • OBS Studio exports
10x
Faster than real-time
Get your WEBM SRT in minutes
99%
Accuracy rate
Industry-leading AI for WEBM files
53+
Languages
Subtitles in any language
30+
Export formats
SRT, VTT, text, and more
How It Works

Convert WEBM to SRT in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your WEBM file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes and timestamps your WEBM audio.

Step 5

Edit subtitles

Fine-tune subtitle timing and text with our editor.

Step 6

Export SRT

Download your WEBM subtitles as an SRT file.

Common Questions

Everything about WEBM to SRT

Can I create SRT subtitles from a YouTube WebM download?

Yes! Upload your downloaded WebM, Sonix transcribes the Opus audio with word-level timestamps, then export to SRT format. Perfect for creating your own subtitles for YouTube content.

How accurate are WebM-to-SRT subtitle timings?

Sonix generates word-level timestamps from WebM audio with precision within a few hundred milliseconds. Opus audio, common in modern WebM files, produces excellent timing accuracy.

Can I upload SRT subtitles to YouTube from WebM?

Yes! Create subtitles from your WebM using Sonix, export as SRT, then upload to YouTube's caption settings. Works whether you're the content creator or contributing community subtitles.

How do I add SRT subtitles to my WebM for web playback?

For HTML5 video, use a track element pointing to your SRT (or better, convert to VTT). Most HTML5 players can display subtitles alongside your WebM video.

Can I include speaker labels in WebM SRT subtitles?

Yes! Enable speaker detection when exporting to SRT. Perfect for podcasts, interviews, multi-person tutorials, and educational content.

What's the best workflow for subtitling OBS WebM recordings?

Record in OBS with WebM/Opus, upload to Sonix, transcribe, edit timing if needed, export SRT. Add the SRT to your video in editing software or upload separately to your platform.

Why Sonix

Perfect SRT subtitles from WEBM files

Precise Timestamps

Word-level timing ensures your subtitles sync perfectly with the audio.

Universal Format

SRT works with YouTube, Vimeo, Facebook, and all major video platforms.

Customizable

Adjust timing, line length, and caption duration to your needs.

Editor Friendly

Import directly into Final Cut Pro, Premiere, DaVinci Resolve, and more.

Related

More ways to convert WEBM files

Other WEBM conversions

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Add Subtitles to WEBM

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Other file formats

OGX to text
MOOV to text
VOB to text
WMV to text
OGV to text
MPEG to text
M2V to text
MK3D to text
3GP to text
MXF to text
See all supported file formats
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Julie D.
Roanoke, VA USA
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