Convert video to H.265 (HEVC) — half the size, same quality

H.265 shrinks your files without losing quality, but the encoding itself takes real work — there's no hardware shortcut for it in a browser. OpenConvertVideo still saves you the upload wait, and it's free, private, with no account or size limit.

Convert to H.265 →
  • No upload wait
  • Nothing leaves your device
  • Free, no account
  • No artificial size limits

Why H.265? Smaller files, same quality.

H.265, also known as HEVC (High Efficiency Video Coding), is the modern successor to H.264. At the same visual quality, H.265 produces files that are roughly 40–60% smaller — which means less storage space, faster sharing, and lower streaming costs.

It is the native format of iPhones, iPads, and Macs, and is supported by all major media players including VLC, Windows Media Player (with the free HEVC extension), and every 4K TV made in the last five years.

Supported output containers

  • MP4 — the most compatible choice; includes the hvc1 tag for Apple/QuickTime playback.
  • MKV — ideal for archiving; supports multiple audio tracks and subtitles alongside H.265 video.
  • MOV — native Apple container; plays directly in QuickTime and Final Cut Pro.

Quality presets

  • High — minimal compression. Best for archiving or further editing. Largest file size.
  • Balanced — the recommended setting. Cuts file size by 50–70% with quality loss that is barely perceptible.
  • Small — maximum compression for sharing over slow connections. Some visible quality loss in fast-motion scenes.

How it works

Conversion runs locally using ffmpeg compiled to WebAssembly with libx265 — a software encoder, the same kind desktop tools use, just running in your browser instead of on a server. H.265 is computationally heavy, so it takes longer to encode than H.264 on the same hardware; the payoff is a file roughly half the size at similar quality. No file is ever sent to a server — your own processor does every bit of that heavy encoding, not ours — so there's no file size limit, and you're still spared the upload wait that most converters add on top. 100% private, as it should be.

Frequently asked questions

What is H.265 (HEVC)?
H.265, also called HEVC (High Efficiency Video Coding), is the successor to H.264. It produces the same visual quality at roughly half the file size, making it ideal for storage, streaming, and sharing large videos.
Will H.265 files play everywhere?
H.265 is natively supported on all Apple devices (iPhone, iPad, Mac), modern Android phones, VLC, and most 4K TVs. Windows 10/11 supports it with the free HEVC Video Extensions from the Microsoft Store. Chrome and Firefox do not play H.265 in the browser, but the downloaded file will play fine in any media player.
How much smaller will the file be?
Typically 40–60% smaller than an equivalent H.264 file at the same quality setting. The exact reduction depends on the source content — talking-head videos and static scenes compress the most.
Is there a file size limit?
No. Because nothing is uploaded, there is no server-imposed limit. The only constraint is your device's available memory.
Is H.265 encoding slow?
Yes, slower than H.264 — there's no hardware shortcut for H.265 in a browser, so it's handled by a software encoder. On a modern laptop, a few minutes of footage typically takes one to two minutes on the Balanced preset. The trade-off is a file roughly half the size at the same quality.

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