WebM to SRT, Fast and Editable
Generate synchronized SubRip SRT subtitles from WEBM files in the browser, with local audio extraction, Whisper word timestamps, and an editable SRT preview.
convert webm to srt in three steps
Start with a WebM file and finish with an editable SRT subtitle file, all in your browser. SubTran keeps video frames local and uses OpenAI Whisper for word timestamps.
Upload your WEBM file
Open the WebM, choose automatic language detection or pick a language, and let the browser extract and compress audio locally using FFmpeg WebAssembly.
Transcribe and group timestamps
SubTran sends compressed audio chunks to OpenAI Whisper, receives word-level timestamps, and groups words into readable SubRip cues based on pauses, punctuation, and line length.
Review, edit, download
Edit cue text, timestamps, sequence numbers, or line breaks in the browser-based SRT editor, then download as SRT, TXT, or WebVTT for editors, players, or publishing workflows.
webm subtitles that use word timestamps
Automatic speech transcription
OpenAI Whisper recognizes dialogue and returns word-level timestamps used to build synchronized subtitle cues, enabling accurate timing for SubRip SRT.
Local audio extraction
The browser extracts and compresses the audio track locally with FFmpeg WebAssembly before sending transcription chunks, so video frames remain on the device.
Readable SRT segmentation
Words are grouped around punctuation, pauses, cue duration, and line length instead of fixed intervals, producing usable cues for editors and players.
Editable SRT preview
Review and edit sequence numbers, timestamps, cue text, and line breaks in a browser-based subtitle editor before exporting SubRip SRT.
Long recording support
Long WEBM media is split into ten-minute audio chunks, transcribed in sequence, and merged back into one continuous subtitle timeline with correct offsets.
Multiple spoken languages
Use automatic language detection or select the spoken language before generating subtitles to support multilingual recordings and accurate transcription.
webm transcription that saves time and preserves privacy
Skip manual timestamps
Start with synchronized subtitle cues instead of typing dialogue and timing every line by hand, reducing editing time for creators and editors.
Keep video frames local
Only compressed audio chunks leave the browser for speech recognition, so your WEBM video frames and on-screen content remain on your device.
Import into common tools
Download standard SRT (SubRip) files that import into video editors, media players, course platforms, and caption workflows without conversion hassle.
Improve accessibility
Add readable captions that help viewers follow speech, increasing comprehension for students, meeting participants, and viewers who are deaf or hard of hearing.
Create reusable text
Export the same transcription as TXT or WebVTT when you need plain text, web-ready captions, or alternative subtitle formats like VTT for web players.
Work in a browser
Generate, review, edit, and download an SRT file in a browser-based subtitle editor built on FFmpeg WebAssembly without installing software.
webm captioning for creators, educators, and meetings
Caption interviews
Convert spoken interviews in WebM video into synchronized subtitles with editable dialogue and timing for publishing or archive use.
Subtitle courses and tutorials
Create an SRT draft for lessons, demonstrations, training material, and educational recordings so learners can follow along and search content.
Caption social video
Generate subtitle files for short-form clips, marketing videos, presentations, and creator content that need accurate, readable captions.
Prepare editor imports
Download SubRip SRT for use in editors and caption workflows that accept standard SRT files, avoiding manual cue creation in FFmpeg or NLEs.
Make archives searchable
Turn speech from older recordings into timed text that is easier to review, quote, and index for research, legal, or editorial reuse.
Support accessible playback
Add captions to recorded content so viewers can follow dialogue without relying only on audio, improving compliance with accessibility expectations.
How to convert WEBM to SRT online?
How do I convert WEBM to SRT?
Upload the WEBM file, choose the spoken language or automatic detection, start transcription, then review and download the SRT preview. The editor lets you adjust timestamps and line breaks before export.
Can I generate editable SRT from a WEBM file in the browser?
Yes. SubTran runs audio extraction in the browser and provides an editable SRT preview so you can change cue text, sequence numbers, and timestamps before downloading.
Best way to get accurate SRT subtitles from WEBM recordings?
Use a tool that extracts audio locally, uses OpenAI Whisper for word timestamps, and groups words into readable cues. That combination yields accurate timings and usable SRT output.
Does SubTran keep my WEBM video on my device?
Yes. For video inputs, SubTran keeps frames local and only sends compressed audio chunks for transcription, so the visual content does not leave your device.
How does OpenAI Whisper create word timestamps for WEBM?
OpenAI Whisper returns speech recognition results with word-level timestamps. SubTran converts those timestamps into SubRip cue start and end times and merges chunk offsets for long recordings.
How to edit timed SRT cues after converting WEBM?
Open the SRT preview in SubTran's browser editor, then edit cue text, adjust timestamps, split or join cues, and fix line breaks before exporting SRT, VTT, or TXT.
Can I convert WEBM screen recordings to SRT for meetings?
Yes. SubTran is designed for browser recordings, screen captures, and online meetings. It handles multi-minute recordings, splits long audio into chunks, and returns continuous subtitles.
Is there a browser tool that extracts audio locally from WEBM?
Yes. SubTran uses FFmpeg WebAssembly to extract and compress audio locally before sending it for speech-to-text transcription.
Start converting webm to srt now
Upload a WEBM, use automatic language detection, edit timed cues, and download an SRT file compatible with editors, players, and publishing platforms.