CONVERT MOV → 3GP (MOV to 3GP)
Fast, secure MOV to 3GP conversion. No registration required.
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HOW TO CONVERT MOV → 3GP
Upload the MOV
Drop your MOV onto the uploader. Files up to 25 MB run on the free tier without registration; paid plans go up to 2 GB.
Stream-copy or re-encode
FFmpeg probes the codecs; if compatible, it stream-copies (no quality loss). Otherwise it transcodes at matching bitrate.
Download the 3GP
Fetch the converted 3GP as soon as it is ready. Both files auto-delete within two hours.
Here is the short version — MOV is Apple's QuickTime container, a close cousin of MP4 with extra editing metadata. Hence the need for 3GP. Converting MOV to 3GP changes how the video is packaged without re-recording it. Most MOV to 3GP jobs are about getting the file to open on a platform that refuses the original container — an upload form, a social app, an older media player. KaijuConverter uses FFmpeg to either stream-copy (no re-encoding, zero quality loss) or transcode when codecs differ, and keeps the original MOV intact. Keep in mind MOV is Apple's QuickTime container, a close cousin of MP4 with extra editing metadata. And remember that 3GP is the mobile video container standardised by 3GPP for early smartphones.
Why convert MOV to 3GP
3GPP Video is better supported than QuickTime Movie across web uploads, social networks and consumer devices. Converting trades the niche advantages of MOV for broad playback and fewer "file type not supported" messages. Stream copy (when codecs match) keeps the video bit-identical to the source.
MOV vs 3GP — Technical specifications
Side-by-side comparison of the technical details.
MOV
- MIME type
- video/quicktime
- Extensions
- .mov, .qt
- Container
- QuickTime File Format (ISO Base Media File Format)
- Common codecs
- ProRes, H.264, HEVC, DNxHD, Animation
- Max file size
- 2^64 bytes
- MIME Type
- video/quicktime
- Extension
- .mov
- Category
- Video Files
- Full Name
- QuickTime Movie
- Conversion Engine
- FFMPEG
3GP
- Extensions
- .3gp, .3g2
- Container
- MPEG-4 Part 14 subset
- MIME Type
- video/3gpp
- Extension
- .3gp
- Category
- Video Files
- Full Name
- 3GPP Video
- Conversion Engine
- FFMPEG
- MIME types
- video/3gpp, video/3gpp2
- Video codecs
- H.263, MPEG-4 SP, H.264
- Audio codecs
- AMR-NB, AMR-WB, AAC
| Specification | MOV | 3GP |
|---|---|---|
| MIME type | video/quicktime | — |
| Extensions | .mov, .qt | .3gp, .3g2 |
| Container | QuickTime File Format (ISO Base Media File Format) | MPEG-4 Part 14 subset |
| Common codecs | ProRes, H.264, HEVC, DNxHD, Animation | — |
| Max file size | 2^64 bytes | — |
| MIME Type | video/quicktime | video/3gpp |
| Extension | .mov | .3gp |
| Category | Video Files | Video Files |
| Full Name | QuickTime Movie | 3GPP Video |
| Conversion Engine | FFMPEG | FFMPEG |
| MIME types | — | video/3gpp, video/3gpp2 |
| Video codecs | — | H.263, MPEG-4 SP, H.264 |
| Audio codecs | — | AMR-NB, AMR-WB, AAC |
MOV vs 3GP — Strengths and limitations
What each format does best, and where it falls short.
MOV Strengths
- Professional-grade container — supports ProRes, DNxHD, and every pro codec.
- Multi-track friendly — video, audio, subtitles, chapters, markers all coexist.
- Native in every major NLE (Final Cut, Premiere, Resolve, Avid).
- Low overhead — the ISOBMFF structure is efficient.
- Timecode, alpha channels, and HDR metadata are first-class citizens.
Limitations
- Windows and Linux need QuickTime or FFmpeg-based players to read all features.
- ProRes-encoded MOVs are gigantic — 4K clips run 400-900 MB/minute.
- Metadata format diverges slightly from MP4, which causes interop bugs.
3GP Strengths
- Extremely low bitrate and file size — great for 2G/3G networks.
- Universal playback in feature phones and early smartphones.
- Based on MP4 — easy to convert and handle with modern tools.
- Mandatory codec in every 3G device since 2001.
Limitations
- Tiny resolutions — rarely above 320×240 in practice.
- H.263 video is far behind H.264 in compression efficiency.
- Metadata support is minimal.
Quality & Compatibility
Stream-copy is bit-perfect: when the codecs inside MOV match what 3GP can carry, the frames are copied across without re-encoding and the output is visually identical to the source. When transcoding is required, we target CRF 20–23 H.264 — visually transparent for most content — and keep audio bitrate at 192 kbps AAC.
Tips for Best Results
- Stream-copy beats re-encoding by orders of magnitude — check if your MOV already uses 3GP-compatible codecs before picking Advanced settings.
- For social uploads, 1080p at 30 fps strikes the best quality-to-size ratio; 4K is often downscaled server-side anyway.
- Keep the MOV if you plan further editing — transcoded 3GP is fine for final delivery but not for intermediate edits.
Frequently Asked Questions
Only when it has to. If the codecs inside MOV (usually H.264 or H.265 for video, AAC for audio) are accepted by 3GP, we stream-copy — the bytes are repackaged into the new container with zero re-encoding and no quality loss. When the source uses a codec the target does not support, we transcode at a matching bitrate to keep the visual quality close to the original.
With stream copy, expect the job to finish in seconds to tens of seconds regardless of video length — the work is mostly rewriting the container. Transcoding is slower (roughly real-time: a ten-minute clip takes about ten minutes) because every frame must be decoded and re-encoded. The progress bar shows which mode applies.
Yes. Resolution, frame rate, colour space and bit depth are preserved by default; stream copy is literally bit-identical on these parameters. If you explicitly pick a lower bitrate or a different codec in Advanced, the output is rebuilt to those settings, but the default is always "match the source".
QuickTime Movie
Source formatMOV is Apple's QuickTime container format, widely used in video production on macOS and iOS. It supports high-quality codecs like ProRes and is the default recording format for iPhones and professional cameras.
3GPP Video
Target format3GP is a multimedia container designed for 3G mobile phones. It stores video and audio at low bitrates optimized for limited bandwidth. Many early mobile phone recordings use this format.
Going the other way? Convert 3GP back to MOV with the same engine.
Common Use Cases
Share across platforms
Send 3GP files to anyone without worrying about whether they have the right software for MOV.
Embed in documents
Drop 3GP output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
3GP often produces smaller files than MOV for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
MOV vs 3GP — Typical file sizes
Approximate file sizes for common scenarios.
- iPhone 4K clip (HEVC, 1 min) 170-300 MB
- 4K ProRes 422 (1 min) 400-600 MB
- 1080p ProRes 4444 (1 min) 800 MB - 1.5 GB
- 1-min MMS video (176×144) 300-800 KB
- 5-min phone clip (320×240) 5-15 MB
Working with 4K/8K Video or Files Over 100MB?
Web browsers impose strict RAM limits on media streams. For gigabyte 4K/8K footage, GPU-accelerated NVENC transcode, or batch subtitle muxing, dedicated desktop encoders deliver zero upload delays.
One-time payment with zero recurring commitment: convert files up to 1 GB, OCR, PDF/A, and .ZIP batches for 24 hours.
Full 7 days of unlimited conversions, up to 2 GB per file, 100% ad-free with zero subscription.
High-throughput enterprise pipeline for files up to 2,048 MB, 50-file batches, ISO PDF/A, and priority processing.
Uncapped 4K/8K multi-track transcoding with hardware NVENC, VideoToolbox, and AV1/HEVC pipelines.
10-bit color grading workflows, Apple ProRes mastering, and automated watch-folder queues.
Related comparisons
See these formats side by side to understand which fits your use case best.
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