Speech to Text
Upload an audio file and turn speech into a transcript you can preview, copy, and export as TXT, JSON, SRT, or VTT.
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Dia TTS is a browser-based speech-to-text and audio transcription tool for turning recorded speech into readable text. Upload an MP3, OGG, WAV, M4A, or AAC file up to 50MB and 30 minutes, then review the transcript alongside the original recording. When timing and speaker information are available, the transcript preview follows audio playback, separates speaker turns, and lets you jump to a spoken word or segment. You can copy the complete transcript or export it as TXT, JSON, SRT, or VTT. The current page works with uploaded audio files. It is not a live dictation tool, video uploader, or audio translation service.
See It in Action
A real result generated with Dia TTS.
Input
Output
Why Use the Dia TTS Speech to Text
Convert recorded speech from MP3, OGG, WAV, M4A, and AAC files into readable text. Each upload can be up to 50MB and 30 minutes long, making the tool suitable for voice recordings, interviews, podcast segments, lessons, and other spoken audio.
Review the transcript while listening to the original audio. When timed word data is available, the preview follows playback and lets you select a word or segment to move to the corresponding point in the recording. When speaker information is detected, different speakers are displayed in separate turns.
Copy the full transcript or export it in a format that fits your workflow. Use TXT for plain text, JSON for structured transcript data, and SRT or VTT for subtitle workflows. Subtitle exports can include speaker labels, punctuation, supported audio tags, configurable cue grouping, and optional word-level timestamps for VTT.
There is no transcription software to install. Upload your audio and manage the result directly in your browser. New users can sign up and use complimentary credits to try the speech-to-text tool. Credit usage is based on the length of the uploaded audio and is calculated by minute.
How to Transcribe Audio to Text
Upload a Clear Audio File
Select an MP3, OGG, WAV, M4A, or AAC recording. The file must be no larger than 50MB and no longer than 30 minutes.
- •Use audio with clear, audible speech
- •Keep voices louder than background music and environmental noise
- •Avoid strong echo, clipping, and heavy compression
- •Reduce overlapping speech when possible
- •Trim long sections that contain no useful speech
- •Check that the correct recording has finished uploading before submitting
Start the Audio Transcription
Submit the uploaded recording to begin transcription. You do not need to enter a script or manually type what is being said. The tool processes the spoken content and creates a transcript automatically. Processing time and transcription quality depend on factors such as audio length, recording clarity, background noise, accents, speaking speed, and the amount of overlapping speech.
Review, Copy, and Export the Transcript
Open the completed result to read the transcript beside the original audio. When timing information is available, playback highlights the relevant words and lets you jump to a specific part of the recording. Copy the complete text or export it as TXT for notes and editing, JSON for structured data, SRT for video editors and media players, or VTT for websites and compatible web players. If the transcript needs corrections, export or copy it and make the final edits in your preferred text or subtitle editor.
Who Uses Audio-to-Text Transcription
Dia TTS helps creators, teams, educators, and researchers turn authorized audio recordings into text and subtitle files for practical follow-up work.
Podcasts and Interviews
Create a podcast transcript from recorded episodes, interviews, and guest conversations. When speaker information is available, the transcript can display separate speaker turns to make conversations easier to follow.
Meetings, Lectures, and Voice Notes
Turn recorded meetings, lessons, presentations, and voice notes into text that is easier to review and search. The current tool works with uploaded recordings rather than live meetings or microphone dictation.
Subtitles and Content Production
Convert audio to SRT or VTT for editing and publishing workflows. Use the transcript as a starting point for captions, show notes, articles, and short-form content. If your source is a video, extract its audio first because the current page accepts audio files only.
Research and Documentation
Transcribe research interviews, user feedback, support recordings, and other authorized audio. Export plain text for reading or keep structured JSON and timestamped subtitle files for later processing.