# Audio to Text Transcriber (AI) Transcribe speech from audio (wav/mp3/m4a/flac/ogg/webm/aac) to text, SRT, VTT or JSON using the grok-stt AI model. Up to 10 minutes. > Canonical page: https://elysiatools.com/en/tools/audio-to-text-transcriber - **Category:** AI Tools - **Keywords:** audio, transcribe, speech to text, stt, subtitle, srt, vtt, caption, grok, whisper, transcription ## Overview Upload an audio or video file containing speech and the tool transcribes it with x-ai/grok-stt-1.0 through OpenRouter. Long inputs are split near silence into bounded FLAC chunks. Subtitle formats use native word or segment timestamps when the provider returns them; otherwise they use clearly labelled silence-aligned approximate timing. Supports WAV, MP3, M4A, FLAC, OGG, WebM, and AAC. Audio duration follows your plan limit (free tier: 10 min, enforced by the platform). Choose automatic detection or a language hint for better accuracy. ## Inputs - **Audio File** (file): Upload an audio/video file with speech - **Output Format** (select) - **Language Hint** (select) - **Maximum chunk duration (s)** (number) ## When to use - Convert interviews, meetings, lectures, or voice recordings into searchable text. - Create SRT or VTT subtitles from spoken audio for video content. - Generate a structured JSON cue list when you need timestamped transcription data. ## How it works - Upload a supported audio or video file containing speech, such as WAV, MP3, M4A, FLAC, OGG, WebM, or AAC. - Choose Plain text, SRT subtitles, VTT subtitles, or JSON cue list as the output format. - Select automatic language detection or provide a language hint for English, Chinese, Spanish, Russian, French, German, or Portuguese. - For longer inputs, the tool splits audio near silence into bounded FLAC chunks before transcription. ## Use cases - Transcribe interviews, calls, lectures, and recorded notes into plain text. - Add SRT or VTT captions to short videos and spoken-content recordings. - Create timestamped JSON cue data for reviewing or organizing spoken audio. ## Frequently asked questions ### What file formats are supported? Supported audio formats include WAV, MP3, M4A, FLAC, OGG, WebM, and AAC. The tool also accepts supported WebM and MP4 video uploads containing speech. ### What output formats are available? You can export plain text, SRT subtitles, VTT subtitles, or a JSON cue list. ### How long can the uploaded file be? The free tier supports up to 10 minutes, with the applicable duration limit enforced by your plan. ### Can the tool detect the spoken language? Yes. Choose Auto detect or provide a language hint to help guide transcription. ### Are subtitle timestamps exact? SRT and VTT outputs use provider word or segment timestamps when available. Otherwise, they use clearly labelled silence-aligned approximate timing. ## Related tools - [Audio Melody Contour Extractor](https://elysiatools.com/en/tools/audio-melody-contour-extractor): Extract a dominant melody path from audio and export MIDI, note events, a pitch contour, SVG, and JSON in one ZIP. - [Audio Chord Progression Detector](https://elysiatools.com/en/tools/audio-chord-progression-detector): Estimate an audio file's chord sequence locally and download CSV, JSON, SVG, and method notes in one ZIP. - [Batch Audio Converter](https://elysiatools.com/en/tools/audio-batch-converter): Convert multiple audio files between different formats like MP3, WAV, FLAC, AAC, OGG, Opus with quality settings and batch processing - [Audio Codec Swap](https://elysiatools.com/en/tools/audio-codec-swap): Change the codec of an audio file within a chosen output format - [Audio Format Converter](https://elysiatools.com/en/tools/audio-converter): Convert audio files between different formats like MP3, WAV, FLAC, AAC, OGG with quality settings and volume adjustment - [Audio to Multitrack MIDI (Draft)](https://elysiatools.com/en/tools/audio-to-multitrack-midi): Split a full mix into stems (drums/bass/other/vocals) and transcribe each to MIDI — a multi-track starting point for transcription - [Data URI Generator](https://elysiatools.com/en/tools/data-uri-generator): Convert files into Data URIs (Base64 or percent-encoded) for inlining images, fonts, and assets directly into HTML, CSS, or Markdown - [Audio Declipper](https://elysiatools.com/en/tools/audio-declip): Repair clipped audio by reconstructing peaks that exceeded the maximum amplitude. Restore distorted audio from overdriven recordings or excessive gain ## Samples - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Video Samples](https://elysiatools.com/en/samples/video-samples): Sample video files in different formats and orientations