How to Convert MTS to 3GP — Quick & Free
Fast, instant MTS to 3GP conversion. No signup required. Just drop your .mts file and get .3gp in seconds.
Batch Settings
Generation loss — quality may degrade
MTS uses lossy compression, and so does 3GP. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Some metadata may not survive
Your MTS file may contain AVCHD metadata metadata. 3GP has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
What compression artifacts to expect
3GP lossy compression can produce heavy blockiness (extreme compression). At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
About MTS to 3GP Conversion
Short answer: yes, you can convert MTS to 3GP online for free, and some quality differences may occur depending on the format types. Just upload your .mts file to CocoConvert, pick 3GP as the output, and click Convert. The whole process takes seconds.
Now for the details. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD. 3GP is a mobile video format designed for small file sizes on cellular networks. Converting between these two formats lets you convert between formats quickly.
Full Name: MTS uses AVCHD Video, while 3GP uses 3GPP Multimedia. Compression: MTS uses Lossy, while 3GP uses Lossy. Color Depth: MTS uses 8-bit, while 3GP uses 8-bit.
Your MTS file is decoded and re-encoded as 3GP. MTS uses lossy compression, and so does 3GP. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Common misconception: ""I'll convert to 3GP and then back to MTS — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going mts → 3gp → mts will produce a noticeably worse file than the original. always keep your source file.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert MTS to 3GP
- 1
1. Upload MTS
Drop your .mts file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select 3GP
Choose .3gp from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .3gp file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert MTS to 3GP
Your MTS video is transcoded — video and audio streams are decoded and re-encoded into the 3GP container. This is a lossy process that takes time proportional to the video duration.
Your MTS file is demuxed — video, audio, and subtitle streams are separated
The video stream is decoded frame-by-frame, then re-encoded with 3GP-compatible codecs (typically H.264 for MP4)
The audio stream is decoded and re-encoded (or copied if the codec is compatible)
Subtitle and chapter data is preserved where the target supports it
Streams are muxed into the 3GP container and the file is saved
MTS vs 3GP — Detailed Comparison
| Feature | .MTS | .3GP |
|---|---|---|
| Full Name | AVCHD Video | 3GPP Multimedia |
| Compression | Lossy | Lossy |
| Color Depth | 8-bit | 8-bit |
| HDR Support | No | No |
| Typical File Size | 100–200 MB per minute | 5–20 MB per minute (very low quality) |
| Platform Support | Limited | Limited |
| Browser Support | none | none |
| Year Created | 2006 | 2003 |
| Open Standard | No | Yes |
Should You Convert MTS to 3GP?
When to Convert
- ✓When you specifically need a 3GP file for your workflow
When NOT to Convert
- ✗You're converting just because the file "seems old" — re-encoding lossy-to-lossy always degrades quality
Common Mistakes When Converting MTS to 3GP
"I'll convert to 3GP and then back to MTS — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going MTS → 3GP → MTS will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Is MTS to 3GP conversion free?
Yes. CocoConvert offers free MTS to 3GP conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is MTS to 3GP conversion?
Most files convert in 2–10 seconds depending on size. Large video files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded MTS file and the converted 3GP file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting MTS to 3GP lose quality?
MTS uses lossy compression, and so does 3GP. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Can I convert 3GP back to MTS?
Yes, CocoConvert supports 3GP to MTS conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.