Convert 3GP to captions

Sonix transcribes your 3GP file and creates closed captions that make your content accessible to everyone.

ADA compliant
5-min turnaround
Accessible
Audio
Video
DOCX
SRT/VTT
PDF
53+ Languages
About This Format

Understanding 3GP files

What is a 3GP file?

Mobile video format optimized for MMS and cellular networks

The 3GP file was created by the 3rd Generation Partnership Project Group (3GPP). It is primarily designed for transmitting multimedia files taken by cell phone videos and sending them over the Internet.
3GP is the required, standard format for media files sent using Multimedia Messaging Service (MMS) and Multimedia Broadcast Multicast Services (MBMS). Thus, the 3GP video container format was developed with the intention to save on disk space, bandwidth, and data usage, which is why they're often seen created from, and transferred between, mobile devices.

Common Uses

  • Cell phone video recordings
  • MMS multimedia messages
  • Low-bandwidth video streaming

Audio Quality

Highly compressed for mobile; audio quality may be limited

Transcription Tips for 3GP

  • Convert to MP4 for better processing if quality allows
  • Audio quality varies significantly by device

Where 3GP Files Come From

  • Older smartphones
  • Feature phones
  • MMS applications
10x
Faster than real-time
Get your 3GP captions in minutes
99%
Accuracy rate
Industry-leading AI for 3GP files
53+
Languages
Captions in any language
30+
Export formats
SRT, VTT, SCC, and more
How It Works

Create captions from 3GP in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your 3GP file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes your 3GP with word-level timestamps.

Step 5

Edit captions

Fine-tune timing and formatting for accessibility.

Step 6

Export

Download closed captions in SRT, VTT, or SCC format.

Common Questions

Everything about 3GP captions

Can you create closed captions from 3GP files?

Yes! Sonix transcribes your 3GP file with precise timestamps and creates closed captions in standard formats.

What's the difference between subtitles and closed captions?

Closed captions include non-speech elements like [music], [applause], and speaker identification. They're designed for deaf and hard-of-hearing viewers.

Are Sonix captions ADA compliant?

Yes! Sonix captions meet accessibility requirements when properly reviewed and edited. Our editor helps ensure timing and accuracy standards.

What caption formats are supported?

Export captions as SRT, VTT, SCC (for broadcast), and other formats. Each format has specific use cases.

Can I add sound descriptions?

Yes! Use our editor to add [music], [laughter], and other non-speech descriptions for full accessibility.

Do captions help with SEO?

Absolutely! Captions make your video content searchable and improve accessibility, both of which can boost SEO rankings.

Why Sonix

Accessible captions from 3GP files

Accessibility First

Create captions that make your content accessible to deaf and hard-of-hearing viewers.

ADA Compliant

Meet accessibility requirements with properly formatted closed captions.

Sound Descriptions

Add non-speech elements like [music] and [applause] for full context.

SEO Benefits

Captions make video content searchable and improve discoverability.

Related

More ways to convert 3GP files

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Other file formats

OGV to text
MP4 to text
M4V to text
VOB to text
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WMV to text
FLV to text
MK3D to text
M2V to text
MXF to text
See all supported file formats
Reviews

Trusted by accessibility teams

4.98 rating from 211 reviews

The entire process is extremely straightforward and what I liked most was the accuracy of the transcriptions and translations. I must say, I had some doubts as to what the quality would be like since it was in French, but I was not disappointed in the least.
RI
Rahmim I.
Melbourne, Australia
Sooooooooooo easy to use and accurate.
JK
Jennifer K.
Seattle, WA USA
I have a 30-40 minute commute to work and like to dictate memos and other brief documents along the way–but I haven't had an easy way to get them transcribed...until now. Thanks Sonix!
ND
Nick D.
Waterloo, Ontario Canada
I loved that Sonix supports so many languages. I've been working on a project that involves speakers of 6 different languages and it allows me to translate everything into English ...
PG
Paula G.
Sao de los Campos, Brazil
This technology managed to shock me! It saved me so much time and effort!
KU
Kaan U.
Wassenaar, Netherlands
I am VERY happy with the transcription! There were a few glitches, but 98% great.
JC
Jonathan C.
Rice Lake, WI, USA
Works very well with Arabic voices.
MA
Mohamed A.
Dubai, UAE
Fantastic product and service. Fast, great quality transcript, great online editing facility. Whole experience was easy and problem free.
SL
Sonia L.
Perth, Australia
Read more testimonials
Get Started

Create 3GP captions now

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AI transcription and translation in 53+ languages.

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