Step 1
Upload video
Upload your 3GP video file to Sonix and select the language.
Add subtitles to 3GP videos
Sonix automatically transcribes your 3GP video and lets you add professional subtitles with customizable styling.
Free to start — no credit card required.See pricing
Auto-transcribe
Custom styling
Burn-in option
10x
Faster than real-time
Add subtitles to 3GP in minutes
99%
Accuracy rate
Industry-leading AI transcription
53+
Languages
Subtitles in any language
Custom
Styling
Fonts, colors, positioning
Add subtitles to 3GP in 4 steps
Step 2
Auto-transcribe
Sonix AI transcribes your video with word-level timestamps.
Step 3
Customize subtitles
Split subtitles, adjust timing, and customize fonts and colors.
Step 4
Export or burn-in
Download SRT/VTT files or burn subtitles directly into your video.
Everything about adding 3GP subtitles
Can Sonix add subtitles to 3GP videos?
Yes! Upload your 3GP video, and Sonix will transcribe it and let you add professional subtitles with customizable styling.
Can I burn subtitles into the video?
Yes! Sonix can permanently embed (burn-in) subtitles into your 3GP video with your choice of fonts, colors, and positioning.
What subtitle styles are available?
Customize fonts, colors, background boxes, positioning (top, center, bottom), and more for your burned-in subtitles.
Can I download subtitle files separately?
Yes! Export subtitles as SRT, VTT, or other formats to use with YouTube, Vimeo, or your video editor.
Can I translate subtitles to other languages?
Absolutely! Sonix can translate your subtitles into 55+ languages for multilingual videos.
How do I split subtitles correctly?
Sonix offers auto-split options for max characters per line, lines per caption, and max duration. Fine-tune manually if needed.
Why won't my 3GP file play on my computer?
Many desktop media players lack the AMR and H.263 codecs that older 3GP files use. VLC plays most 3GP files, or you can convert the file to MP4 for wider compatibility.
Do I need to convert 3GP to MP4 before transcribing?
No, 3GP files can be uploaded directly for transcription. Converting to MP4 first is optional and mainly useful if you also want a copy in a more widely supported format.
The easiest way to add video subtitles
Auto-Transcribe
Upload your 3GP and get accurate subtitles automatically.
Custom Styling
Choose fonts, colors, and positioning for professional results.
Burn-in Option
Permanently embed subtitles into your video with one click.
Translate
Create subtitles in 54+ languages from your original video.
More ways to work with 3GP files
More ways to convert & transcribe
Jump straight to a related format, language, or tool — every link below is a real page.
Trusted by video creators
The UI experience is fantastic! It's quick and easy to understand. Plus it's web based so I can switch between my desktop and laptop easily.
I've tried your service, and I love it.
Add subtitles to 3GP now
Try Sonix free with 30 minutes of transcription. No credit card required.
