WAV to Text
Transcribe any WAV in seconds

Yes. Mictoo is free for files up to 60 MB. No signup needed, no watermark on exports, no upsell after the first transcription. For long studio bounces or multi-hour recordings, downsample to 16 kHz mono or re-encode to a short MP3 to stay under the cap.

For clean speech at any reasonable MP3 bitrate (128 kbps or above), no meaningful difference. For noisy, low-gain, or otherwise marginal recordings, WAV can sometimes recover words a low-bitrate MP3 would miss. Most podcast and interview audio falls in the first category.

16 kHz mono, 16-bit PCM is the practical sweet spot. Whisper resamples to that internally anyway. Higher sample rates and bit depths make the file larger without improving the transcript. Keep your original studio-quality WAV in your project folder, and use the downsampled version only for upload.

Yes. Both work directly. Internally we normalise to 16-bit before sending to the speech model, which matches what Whisper expects. The extra bit depth gives you editing headroom in your DAW, but does not change the transcript.

Yes. BWF is a standard WAV with extra metadata chunks (bext, iXML, chna). We read the audio and ignore the metadata. The original file on your drive stays untouched, including all timecode and scene/take info.

Yes. Zoom H1n, H5, H6, H8, Tascam DR-40X, DR-100mkIII, Portacapture X8, and Sound Devices MixPre / Scorpio all default to standard or Broadcast Wave. Drop the file straight in, no conversion needed.

All four export standard PCM WAV by default. Pro Tools and Logic typically write 24-bit at session sample rate, Reaper similar, Audacity writes whatever depth you configured. Mictoo accepts all of them as-is.

WAV does not compress, so size scales with sample rate, bit depth, channel count, and duration. A 30-minute stereo 24-bit 48 kHz file is around 250 MB. Three fixes, in order: (1) downsample to 16 kHz mono 16-bit, which typically drops the file 10-12x with no transcript quality loss for clean speech; (2) trim leading and trailing silence with Audacity Truncate Silence; (3) for very long files, re-encode to a 64 kbps mono MP3 just for the upload. See our compress-audio and split-audio guides for exact steps.

Yes. After transcription finishes you can download SRT or VTT with timestamps every few seconds. Both formats align with your original audio timeline, so they drop straight into your video editor or subtitle workflow.

Yes. The default transcript view shows segment-level timestamps you can click to jump to that moment in the audio. Download as VTT or JSON for word-level granularity, or as SRT for segment-level subtitle format.

Background noise (wind, HVAC, traffic, tape hiss) reduces accuracy noticeably. Run the WAV through Audacity → Effect → Noise Reduction or the free Adobe Podcast Enhance tool before uploading. The cleaned version typically transcribes much better.

No. The file you upload is read by our backend, sent to the transcription provider, and discarded after the response comes back. Your original file on your computer is never modified. We never write a transformed copy back to you.

Edit wrong words inline before exporting. Then download as TXT (plain text), SRT or VTT (subtitle format with timestamps), or DOCX (Word document). Copy directly to clipboard if you just need to paste somewhere. The AI summary appears alongside the transcript automatically.