Convert 3GP to AVI Online
Convert legacy 3GP mobile phone videos to AVI for Windows players and legacy software. Free, no server uploads.
.3gp · up to 100 MB
What you can do
From the old Nokia to the Windows player of your choice
Windows Media Player and VLC
AVI with H.264 plays in Windows Media Player 12, VLC, and desktop DVD players with USB.
100% private
Your personal old phone memories never leave your device. Conversion in local WebAssembly.
H.263 → H.264 in AVI
The H.263 codec from older 3GPs is upgraded to H.264 in the maximum compatibility AVI container.
Dual legacy era
Two historical formats — 3GP (3G phones) and AVI (DivX era) — united for maximum archive compatibility.
How it works
Three steps, no hassle
Upload your 3GP file
Drag or select the .3gp — videos from Nokia, Motorola, Sony Ericsson, or other 3G phones from 2003-2012. No signup.
Re-encoding in the browser
The H.263 or H.264 video inside the 3GPP container is decoded and re-encoded to H.264 inside the AVI container on your device via WebAssembly.
Download your AVI
An .avi file with your old phone memories, compatible with Windows Media Player, VLC, DVD players with USB, and legacy editing software.
FAQ
Got questions?
The answer depends on the file's destination. AVI is the right choice if the video will be played on legacy hardware: desktop DVD players with USB that recognize AVI with DivX/H.264 but not MP4, first-generation TVs with USB input (2008-2012) that prioritize AVI, old video editing software (Windows Movie Maker 2.6, Ulead VideoStudio, VirtualDub) that works better with AVI, or industrial systems with built-in video players that only accept AVI. For use on modern PC or Mac, MP4 or MOV are technically superior. The 3GP to AVI conversion is specifically for compatibility scenarios with hardware and software from the 2000-2012 era.
On Windows 7 and later, yes. Windows 7 includes the native H.264 decoder in Windows Media Foundation, so Windows Media Player 12 can play AVI with H.264 without installing anything additional. On Windows XP and Vista, Windows Media Player doesn't include native H.264 and would require installing a codec pack like K-Lite Codec Pack or ffdshow. For maximum compatibility with Windows XP, the DivX codec (MPEG-4 ASP) inside the AVI would be more appropriate than H.264.
VirtualDub 1.x (classic VirtualDub) requires an H.264 decoder installed on the system as a DirectShow or VFW (Video for Windows) filter. With ffdshow, LAV Filters, or the H.264 decoder from K-Lite Codec Pack installed, VirtualDub can open and edit AVI with H.264. VirtualDub2 (the modern fork) has better native support for modern formats.
First-generation 3G phones (2003-2006) recorded in QCIF (176×144 pixels) at 10-15 fps. Phones from 2006-2008 increased to CIF (352×288) or QVGA (320×240). Smartphones from 2008-2010 reached VGA (640×480) in some cases. The resolution of the resulting AVI videos preserves exactly the original 3GP resolution — no artificial upscaling.
Yes. Windows Movie Maker 2.6 (Windows XP/Vista) and Windows Live Movie Maker (Windows 7/8) can import AVI with H.264 if the corresponding decoder is installed on the system. For Windows Movie Maker on Windows XP, installing K-Lite Codec Pack may be necessary. Modern Windows 10/11 versions don't include Movie Maker, but Microsoft's Photos app offers basic video editing and accepts AVI.
Not in terms of the video itself. Both AVI and MP4 can contain exactly the same H.264 video stream with identical encoding parameters and visual quality. The difference is only in the container: AVI is Microsoft's RIFF container (1992), MP4 is the internationally standardized ISO BMFF container (2001). The choice between AVI and MP4 should be based on the file's destination, not image quality considerations.
Convert 3GP to AVI: old phone memories in the maximum Windows compatibility format
Converting 3GP to AVI combines two formats that define distinct but contemporary technological eras. 3GP emerged in 2001 as the video standard for third-generation mobile phones, adopted by the 3GPP (Third Generation Partnership Project) consortium in specification TS 26.244 to enable video recording and sending on phones with the severe processing and bandwidth constraints of 3G networks. AVI was created by Microsoft in 1992 with Video for Windows technology and became the standard video container for PCs during the 1990s and 2000s. AVI's golden era was the DivX era (1999-2010): when the DivX codec (and its free alternative XviD, based on MPEG-4 ASP/H.263 Part II) enabled compressing DVD movies into 700 MB AVI files that fit on a CD-ROM, AVI became the universal non-commercial video distribution format. Desktop DVD players, TVs with USB, multimedia hard drives, and all kinds of video playback hardware from that era recognize AVI as a primary format.
The practical relevance of 3GP to AVI in 2025 comes from two specific scenarios. The first is file recovery: someone who finds an old memory card with 3GP videos from a Nokia or Sony Ericsson and wants to play them on the living room desktop DVD player, which recognizes AVI but doesn't play modern 3GP or MP4. The second scenario is editing in legacy software: Windows XP or Windows 7 users with old video editing software (VirtualDub, Ulead VideoStudio 9-11, Pinnacle Studio 10-12) that works better with AVI than other formats, and who want to incorporate 3GP videos from mobile phones of that era into video projects in those applications. AVI, despite its age, maintains a practical advantage over modern formats in these specific contexts: it is the format with the greatest number of hardware devices that recognize it natively, accumulated over 30 years of consumer hardware production.
Technically, converting 3GP to AVI involves transcoding the H.263 or H.264 Baseline video from the 3GPP container to the AVI container, with video re-encoding to H.264 High or Main Profile (more compatible with modern software) or to MPEG-4 ASP/XviD (more compatible with DivX-era legacy hardware). H.263 (defined in ITU-T H.263, published in 1995 as an evolution of H.261) is the original video codec of first-generation 3G phones; designed for video transmission at very low bitrates (from 20 Kbps) over PSTN and mobile networks. Transcoding from H.263 to H.264 involves full decoding to YUV frames and re-encoding with the H.264 encoder (MPEG-4 AVC, ISO/IEC 14496-10). AMR (Adaptive Multi-Rate, 3GPP TS 26.071) audio is transcoded to MP3 or AAC for maximum compatibility in the AVI container. Convertir.ai runs the entire process in WebAssembly inside the browser, without transmitting videos to any external server, guaranteeing the privacy of those irreplaceable personal files.