Free online FLAC to RTF converter

What the FLAC format is

FLAC, or Free Lossless Audio Codec, stores compressed audio without discarding any audio data. It is common for recordings made with audio applications such as Audacity, professional recorders, media players, and CD-ripping software. FLAC preserves more source detail than lossy formats such as MP3, but it remains an audio container; it does not contain written words unless separate metadata provides them.

What the RTF format is

RTF, or Rich Text Format, stores editable written content with basic formatting such as paragraphs, bold text, italics, fonts, and alignment. Microsoft Word, LibreOffice Writer, WordPad, and many other word processors can open it. RTF is useful when the transcription must be edited or shared across operating systems without depending on one word-processing application.

How to actually convert FLAC to RTF

Use the online converter

1. Open the FLAC-to-RTF converter on 101convert.com.
2. Upload the audio file and select the spoken language if the service provides a language setting.
3. Start the conversion and wait for speech recognition to produce the transcript.
4. Download the resulting RTF file and open it in a word processor for proofreading.

You can convert the file on 101convert.com for free without installing software. This process is transcription, not a direct audio-container rewrite: the service analyzes speech and creates a document from the recognized words.

Use desktop speech recognition

For local processing, install Whisper or a compatible application, then transcribe the recording to plain text. With the OpenAI Whisper command-line package, a typical command is:

whisper recording.flac --model medium --language en --output_format txt

Open the generated recording.txt file in LibreOffice Writer, correct the transcript, then choose File → Save As, select Rich Text Format (.rtf), and save. The --language value should match the spoken language; omitting it lets Whisper attempt language detection.

Quality, compatibility, and limitations

FLAC's lossless audio helps preserve speech detail, but recognition accuracy also depends on microphone quality, background noise, overlapping speakers, accents, and vocabulary. Proofread names, numbers, technical terms, and punctuation. Basic automatic transcription may not identify speakers reliably or preserve meaningful timestamps.

RTF stores the recognized words and basic formatting, not the original FLAC audio. Keep the FLAC separately if the recording is needed for verification. Long recordings may require splitting, and confidential audio should be processed only with a service or application whose privacy terms meet your requirements.