How do I convert my GSM files to SRT? 
Follow these six simple steps to quickly and accurately convert your audio files (*.gsm) to Subrip Subtitle (*.srt). It's really easy, let's get started.
Step 1
Sign up for a free Sonix trial account—includes 30 minutes of free speech to srt conversion.
Step 2
Upload your Global System for Mobile Audio File file(s) (*.GSM) from your computer, Dropbox, Google Drive, or by dragging it on the page.
Step 3
Select the language spoken in your GSM file. We support over 49 different languages. Then click the button 'Start Transcribing Now.'
Step 4
Sonix automatically extracts the audio from your GSM file and converts it to the SRT format. It'll only take a few minutes so you can grab some coffee.
Step 5
Use the Sonix AudioText Editor to polish your SRT transcript. Simply type in your browser to correct any words.
Step 6
Click the 'Export' button. Select 'Subrip subtitle file (.srt)' from the dropdown to download a SubRip Subtitle version of your GSM file.
That's it! Your GSM file has now been converted to text!
Thousands of incredible customers trust Sonix to transcribe their GSM files 
Frequently Asked Questions for Global System for Mobile Audio File (*.GSM) to srt 
What is a GSM file?
GSM is a compressed audio stream that is primarily used by cell phones. GSM files are designed for telephone-quality audio use in Europe and stores audio mainly for telephone quality voice. It makes for a good balance between size of file and quality retention with data around 96KB per minute. GSM is primarily used for voicemail storage or to record phone conversations that will be played back later.
Does Sonix transcribe audio files with a *.GSM file extension?
Yes, Sonix does automatically transcribe audio files with a .GSM file extension. Sonix is an online audio to text converter. Convert any audio (gsm, mp3, m4a, wav, ...) or video (mp4, mov, avi, ...) file to text without installing any software! Sonix quickly and accurately transcribes *.GSM files and converts them to text in a srt format.
Know anyone who needs to convert Global System for Mobile Audio File (.GSM) to srt?
We'd appreciate it if you tell them about Sonix—the best way to convert GSM to srt.
Other ways to convert your GSM audio files with Sonix
GSM to text
Use the most accurate speech-to-text technology to convert files: GSM to text.
GSM to docx
Accurately transcribe your GSM file to Microsoft Word Format (docx) so you can bring the transcript into your workflow.
GSM to PDF
Easily transcribe your GSM file to Adobe's Portable Document Format (pdf) so you can share them with colleagues.
GSM to subtitles
Create subtitles for your GSM files to make them more accessible for your audience.
GSM to VTT
Create more advanced captions for your GSM files by using the latest caption format VTT (Video Text Tracks).
GSM to captions
Quickly and easily create closed captions for your GSM files so you can embed them in your video files.
Convert Global System for Mobile Audio File to SRT version with Sonix 
Sonix automatically transcribes and translates your audio/video files in 49+ languages. Easily search, edit, and share your media files. Sonix is an online, fully-automated speech to text service that quickly converts files in the Global System for Mobile Audio File format to the srt subtitle format (SubRip Subtitle). Fast, accurate, and affordable. Millions of users from all over the world.
Includes 30 minutes of free transcription
