Skip to main content


GSM Audio Transcriber


GSM codec powered early mobile phones, and these highly compressed files still appear in telecom systems and old phone backups. Our GSM converter specializes in extracting clear text from these bandwidth-optimized recordings, handling the unique challenges of narrow-band speech compression.


How the GSM Audio Transcriber works


Upload your GSM file from phone system exports or old mobile backups. Despite the format’s aggressive compression designed for phone networks, our AI compensates for the limited frequency range to extract maximum clarity. The transcription engine is specifically tuned for telephone-quality audio. Get your transcript formatted for call logs, legal documentation, or archive purposes.

GSM transcription unlocks years of telephone history. Call centers convert archived customer calls, researchers transcribe interview recordings from early mobile devices, and families preserve voice messages from old phones. The format’s telecom roots mean these transcripts often capture important conversations.



Meet the fastest voice-to-text for professionals


WriteVoice turns your voice into clean, punctuated text that works in any app. Create and ship faster without typing. Your first step was GSM Audio Transcriber; your next step is instant dictation with WriteVoice.



A blazing-fast voice dictation

Press a hotkey and talk. WriteVoice inserts accurate, formatted text into any app, no context switching


Works in any app

Press one hotkey and speak; your words appear as clean, punctuated text in Slack, Gmail, Docs, Jira, Notion, and VS Code—no context switching, just speed with writevoice

Accurate, multilingual, and smart

97%+ recognition, smart punctuation, and 99+ languages so your ideas land first try, built for teams and pros.

Private by default

Zero retention, audio and text are discarded instantly, with on-device controls so you can dictate sensitive work confidently.



Start with GSM Audio Transcriber, then level up to WriteVoice.io