3G2 to HEVC Converter

Convert 3G2 to HEVC Online

3G2 is the small, low-resolution container that old CDMA-network phones (Verizon, Sprint) recorded to; HEVC (H.265) is a modern, high-efficiency video codec. This tool re-encodes a .3g2 clip with H.265 so the file comes out smaller and feeds modern encoding pipelines — but it cannot add detail the tiny source never captured, so expect a smaller file, not a sharper picture. One thing to know before you start: the .hevc output is a raw H.265 elementary stream with no container and no audio track — if you want a normal, playable file with sound, convert to 3G2 to MP4 (H.264, plays everywhere) or 3G2 to MKV with the H.265 codec instead.

How to Convert 3G2 to HEVC

1. Upload Your 3G2 File: Drag and drop your .3g2 (or .3gp) clip onto the page, or click "+ Add Files" to browse. Several files can be queued at once.
2. Set the Quality Preset: The video codec is fixed to H.265 because the output is a raw .hevc stream. Leave the Quality Preset on "Very High (Recommended)" to stay close to the source, or open File Compression to choose Constant Bitrate, Variable Bitrate, a Specific file size, or a Constant Quality (CRF) level.
3. Adjust Video Resolution or Trim (Optional): Under Video resolution keep the original, scale by Resolution Percentage, or pick a Preset Resolution; use Trim → Time Range to export only part of the clip. Keep the original resolution — upscaling a tiny 3G-era frame adds blur, not detail.
4. Convert and Download: Click "Convert" and download the .hevc stream. No sign-up, no watermark.

H.265 (.hevc) vs H.264 (.mp4): Which Output Do You Want?

Most people converting an old 3G2 clip actually want H.264 in an MP4 container, not a raw .hevc stream. This table shows the real tradeoff so you can pick the right output before you start.

Frequently Asked Questions

Why does the converted .hevc file have no audio?

Because .hevc is a raw H.265 elementary stream, not a container. It holds only the encoded video, so there is nowhere to store the 3G2's soundtrack — typically QCELP, EVRC, AMR, or AAC — and the audio is dropped. That is correct behavior for a raw bitstream, not a bug. If you need the sound, convert to a container instead: 3G2 to MP4 keeps the audio and plays nearly everywhere, and 3G2 to MKV with the H.265 codec puts the same HEVC video inside a playable file alongside its audio. If you only want the soundtrack, use 3G2 to MP3.

Will converting 3G2 to HEVC improve the video quality?

No, and no honest converter can promise it will. A 3G2 clip from a CDMA-era phone was usually captured at a low resolution and bitrate (commonly QCIF 176x144 up to early SD), and re-encoding to HEVC cannot recover detail that was never recorded — lossy in, lossy out, with no upscaling magic. What HEVC does well is shrink the file: at the same visual quality H.265 is roughly 25-50% smaller than H.264. Expect a smaller file, not a better picture. A small, low-resolution 3G2 stays small and low-resolution.

What can actually play a raw .hevc file?

FFmpeg-based players such as VLC and mpv can usually decode a raw H.265 stream, and developer tools like GPAC or an HEVC stream analyzer are built for it. Consumer players — phones, smart TVs, QuickTime, most browsers — generally cannot, because they expect a container. The reliable fix is to mux the stream into a container (for example ffmpeg -f hevc -i video.hevc -c copy video.mp4) or to convert to MP4/MKV from the start. In our testing, a short low-resolution 3G2 re-encoded to H.265 at the default preset produced a smaller stream than the H.264 equivalent, though the exact ratio varies per clip.

Why is HEVC encoding slower, and does it play everywhere?

HEVC's more complex algorithms need much more processing to encode — roughly 2-10x the computational work of H.264 — so conversions take longer, and the codec is patent-encumbered (licensed through pools such as MPEG LA, HEVC Advance, and Velos Media). The HEVC standard (ITU-T H.265 / ISO/IEC 23008-2) was first published in 2013. Playback is native on iPhone 7 and later, Apple Silicon, and most 2017-and-newer Android/Intel/Snapdragon hardware, but it is spotty on older devices and inconsistent in browsers. If broad compatibility matters more than file size, convert to H.264 in an MP4 container via 3G2 to MP4. For the closely related container variants, see 3GP to HEVC and 3GPP to HEVC.

How are my uploaded 3G2 files handled?

Your file is uploaded over an encrypted connection, converted on our servers, and the result is returned to you for download. Uploads are deleted automatically a few hours after conversion — no sign-up, no watermark, and your files are never shared or made public. The main practical limit on a big clip is upload time, not your device.