3GP to MP4 Converter
Need to convert this file type? Drop it below — or drop any other file and we'll auto-switch. Outputs are auto-deleted after 2 hours; share links expire after 4.
Or paste a link to a file
Drop multiple images to combine them into one PDF, Word document, or PowerPoint presentation — or convert each image separately.
Drop
Drag your 3GP file or click to browse.
Convert
MP4 is preselected, or pick a different format below.
Download
Get your file or share a 1-hour link.
Convert 3GP to MP4 online
Convert 3GP to MP4 to bring an old mobile recording into a usable format. 3GP was designed for the storage and bandwidth limits of feature phones, so the footage is small and heavily compressed — MP4 makes it playable and editable everywhere.
When should you convert 3GP to MP4?
- Recover video from an old phone or memory card
- Play a legacy mobile clip on modern hardware
- Edit old footage in software that will not import 3GP
- Upload an archival recording to a platform that rejects 3GP
Before you convert
Resolution stays low
3GP footage is typically 176×144 or 320×240. Converting does not upscale it — the MP4 will be exactly as small and soft as the original.
The file may get larger
3GP is aggressively compressed. Re-encoding at CRF 23 preserves what is there rather than re-crushing it, which can increase the file size.
What happens to your file
3GP to MP4 is a full re-encode, not a container swap: the video is decoded and re-compressed with libx264 (H.264) at CRF 23, preset medium, and the audio is re-encoded to AAC at 192 kbps. The MP4 index is moved to the front of the file (+faststart) so it can start playing before the whole download finishes, and pixels are written as yuv420p for maximum device compatibility.
Settings this conversion runs with
| Engine | ffmpeg |
|---|---|
| Video codec | libx264 (H.264) |
| Video quality | CRF 23, preset medium |
| Audio codec | AAC |
| Audio bitrate | 192 kbps |
What changes
- The 3GP picture is decoded and re-compressed with libx264 (H.264), so this is a generation loss: the output is built from an already-compressed source, not from the original camera data. Converting 3GP to MP4 and back will soften the clip a little more each time.
- Only one video and one audio stream reach the MP4 file. Additional audio languages, embedded subtitle tracks, and chapter markers are not carried across.
About 3GP and MP4 files
3GP video
Strengths
- good for moving images
Limitations
- compatibility varies by device
MP4 video
Strengths
- plays almost everywhere
- good quality-to-size
- widely supported
Limitations
- lossy compression
- less flexible than MKV
3GP vs MP4
| Format | 3GP | MP4 |
|---|---|---|
| Compression | — | Lossy |
| Transparency | — | — |
| Best for | playback, streaming | streaming and sharing, playback on any device |
Related tools
Frequently asked questions
- Does converting 3GP to MP4 re-encode the file?
- 3GP to MP4 is a full re-encode, not a container swap: the video is decoded and re-compressed with libx264 (H.264) at CRF 23, preset medium, and the audio is re-encoded to AAC at 192 kbps. The MP4 index is moved to the front of the file (+faststart) so it can start playing before the whole download finishes, and pixels are written as yuv420p for maximum device compatibility.
- What should you know before converting 3GP to MP4?
- The 3GP picture is decoded and re-compressed with libx264 (H.264), so this is a generation loss: the output is built from an already-compressed source, not from the original camera data. Converting 3GP to MP4 and back will soften the clip a little more each time.
- Is this 3GP to MP4 converter free?
- Yes. You can convert 3GP to MP4 online for free, with no account and no watermark.
- Do I need to install software or sign up?
- No. Use the converter from your browser without installing software or creating an account. Files are uploaded to our servers for processing.
- Will converting 3GP to MP4 reduce quality?
- MP4 uses lossy compression, so the file can get smaller while some visual quality may change.
- Are my files safe?
- Yes. Files are processed only to complete the conversion and are auto-deleted after 2 hours. We never share them.