HEVC to MP4 Converter with H.264 Output

Convert a raw HEVC/H.265 video stream to H.264 video inside an MP4 container for broader playback, editing, and upload workflows. Compatibility still depends on the target device, browser, and software.

Drag and drop your HEVC file here, or choose a file

Drag files here. Maximum size — 5 GB

Why convert HEVC or H.265 to MP4?

  • Create an MP4 file containing H.264 video from a raw HEVC/H.265 source

  • Prepare the video for players that support H.264-in-MP4 but do not accept raw .hevc input

  • Use the result in editing or upload workflows that require an MP4 container

  • Move from HEVC decoding requirements to the more widely supported H.264 codec

  • Turn raw encoder, camera, recorder, or test output into a standard media file

Raw HEVC input vs H.264 MP4 output

HEVC/H.265 input
HEVC/H.265 input
  • HEVC-encoded video data or a raw elementary bitstream
  • Often contains video only, without audio or container metadata
  • May require HEVC decoding support and may not be accepted as a standalone file by common tools
H.264 MP4 output
H.264 MP4 output
  • H.264 video encoded with libx264 inside an MP4 container
  • Usually suitable for a broader range of playback, editing, storage, and upload workflows
  • May differ from the source in visual quality, bitrate, and file size

The conversion decodes HEVC and re-encodes the video as H.264 inside MP4. It does not preserve the original HEVC bitstream, create missing audio, guarantee unchanged quality, or ensure playback in every environment.

How to convert HEVC to H.264 MP4

Upload the HEVC file
Select a .hevc or .h265 file from your device, or drag it into the upload area.
Transcode it with FFmpeg
A server-side FFmpeg worker decodes the HEVC/H.265 stream, re-encodes the video with libx264 as H.264, and creates an MP4 file.
Download the MP4
When processing succeeds, download the H.264 MP4 file and test it in the intended player, browser, editor, or upload workflow.

Common use cases

Play a raw HEVC stream

Convert a video-only .hevc or .h265 stream into H.264 video inside MP4 for use with compatible media players.

Prepare footage for editing

Create an H.264-in-MP4 file for an editor that does not accept the original raw HEVC stream.

Meet an MP4 upload requirement

Generate an MP4 file with H.264 video for platforms or internal workflows that require this container and codec combination.

Organize encoder output

Convert raw HEVC output from an encoder, camera, recorder, or test process into a media file that is easier to store and inspect.

Share a technical sample

Create an H.264 MP4 version of a raw HEVC stream for review in software that supports the resulting codec and container.

Convert HEVC to MP4 online

Free online converter for converting files from HEVC to MP4.

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Convert HEVC to other formats

video converter iconHEVC to MP4High Efficiency Video Coding to MP4

Convert to MP4: supported formats

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Frequently Asked Questions

No. HEVC, also called H.265, is a video compression codec and may also refer to a raw elementary video stream. MP4 is a container that can hold encoded video, audio, timing information, and metadata.

No. The current pipeline is not stream-copy or remux mode. The server-side FFmpeg worker decodes the HEVC/H.265 input and re-encodes the video with libx264 as H.264 before writing the MP4 output.

No. H.264 video inside MP4 is supported by a broader range of common playback workflows than raw HEVC, but compatibility still depends on the H.264 profile, resolution, device hardware, operating system, browser, and media application.

A raw .hevc or .h265 elementary stream commonly contains video only. When the source has no audio track, the conversion does not generate one, so the resulting MP4 will remain video-only.

No. The video is decoded and re-encoded, so visual quality can change. File size may increase or decrease depending on the source, output bitrate, resolution, frame rate, video complexity, and encoding settings.

The source may be incomplete, corrupted, use unsupported HEVC parameters, contain invalid stream data, or require a decoder capability unavailable in the current processing workflow. Some files may therefore fail to produce an MP4 result.

About HEVC to MP4 conversion

HEVC, also known as H.265, is a video compression codec. A file with a .hevc or .h265 extension is often a raw elementary stream rather than a complete media container. MP4 is a container format that stores encoded media data together with timing information and metadata.

FastConvert processes the uploaded source with a server-side FFmpeg worker. The current pipeline decodes the HEVC/H.265 video and uses libx264 to encode a new H.264 video stream, which is then written into the MP4 container. It does not copy the original HEVC stream directly into MP4.

Raw HEVC elementary streams commonly contain video without an audio track. Transcoding the video does not create sound that is absent from the source, so a video-only input normally produces a video-only MP4.

Because the video is re-encoded, visual quality, bitrate, and file size can change. H.264 inside MP4 generally works with a broader range of common software and devices than raw HEVC input, but support still depends on the output video characteristics and the target environment.

Incomplete files, damaged bitstreams, unsupported HEVC profiles, unusual parameters, or invalid source data may prevent conversion. The downloaded MP4 should be checked in the actual browser, player, editor, or platform where it will be used.