H.264 vs H.265 (HEVC): Which Codec to Use

H.265, also called HEVC, compresses video more efficiently than H.264 (AVC), so it reaches similar quality in a smaller file. The catch is compatibility and speed: H.264 plays on practically every browser, phone, TV and editor, while H.265 playback depends on the browser and hardware, and encoding it takes longer. For uploads to YouTube and social platforms, H.264 is the safe default; H.265 makes sense for recording, storage and Apple devices.

More on this topic: Video formats, codecs and numbers, every guide in one place.

Below: a side-by-side table, what each platform accepts, browser support in October 2026, iPhone's High Efficiency setting, and a decision guide.

The short answer

Use H.264 when the file has to play anywhere or upload anywhere: YouTube recommends H.264 for uploads and X requires it. Use H.265 (HEVC) to save storage when recording on a phone or camera, archiving, or sharing within Apple devices; it gives similar quality at a lower bitrate. YouTube and Pinterest accept HEVC uploads, Safari plays HEVC, and Chrome, Edge and Firefox play it only with hardware and OS support.

Key takeaways

• H.265 (HEVC) = similar quality in a smaller file; H.264 (AVC) = plays and edits everywhere.
• YouTube's recommended upload settings specify H.264; HEVC is on its list of accepted formats.
• Browser support for HEVC is partial outside Safari, so don't use it for website video without a fallback.
• iPhones record HEVC under Settings > Camera > Formats > High Efficiency; Most Compatible switches to H.264.
• Export H.264 MP4 for social uploads; keep HEVC for camera originals if storage is tight.

What is the difference between H.264 and H.265?

The difference between H.264 and H.265 is efficiency versus compatibility. H.265 (High Efficiency Video Coding) uses larger, more flexible blocks and better prediction, so it needs less data for the same picture; Apple's support page puts it simply, saying HEVC offers better compression than H.264. H.264 (Advanced Video Coding) is older and less efficient, but it's supported by almost every device and app made in the last 15 years.

How much smaller? It depends on the encoder, settings and content. Encoder comparisons commonly find H.265 needs noticeably less bitrate for the same look, with the biggest gains at 4K. Test with your own footage: export the same clip both ways at the same quality setting and compare file sizes.

Our test (October 2026): on three of our own short clips at matched VMAF, H.265 files ranged from 57% of H.264's size (a detailed product clip) to 104% (a talking head), 84% on average, and x265 medium took about 2.7 times as long as x264 medium. Method and every number: H.264 vs H.265 vs AV1, our test.

Is H.265 better quality than H.264?

H.265 isn't better quality at the same file size by default; it's more efficient, which means it can look better at the same bitrate, or the same at a lower bitrate. At high bitrates both look excellent and the difference is hard to see. Where H.265 helps most is low bitrates and high resolutions, such as 4K on a phone, where H.264 would show blocking sooner.

Quality also depends heavily on the encoder. A slow software encode in either codec usually beats a fast hardware encode in the other, so compare encoders at the settings you'll actually use.

Should you upload H.264 or H.265 to YouTube?

Upload H.264 to YouTube unless you already have an HEVC file. YouTube's recommended upload encoding settings specify H.264 (progressive, High Profile, 4:2:0) in an MP4, while its list of supported formats includes HEVC (H.265). YouTube re-encodes every upload, so viewers never get your codec; what matters is that your file is clean.

Export settings for YouTube are listed in the best export settings for YouTube.

Which browsers play H.265 video?

Safari plays H.265 video; Chrome, Edge and Firefox play it only partially. Caniuse, read in October 2026, marks Safari as supporting HEVC from version 13, Chrome as partial from version 107, Edge as partial, and Firefox as partial from version 137, with support in those browsers depending on the device's hardware decoder and operating system. The same page notes HEVC is complex and expensive to license, which is why browsers have been slow to adopt it.

For a website, that means an HEVC-only video will fail for some visitors. Encode H.264 (MP4) as the main file, or offer an HEVC or AV1 version first with an H.264 fallback in a second <source>. How to embed a video on a website shows the markup.

Should your iPhone record in High Efficiency or Most Compatible?

Keep High Efficiency if storage matters and you mostly share within Apple devices; switch to Most Compatible if you edit on older Windows computers or send files to people on old devices. Apple's support page explains that under Settings > Camera > Formats, High Efficiency records HEIF photos and HEVC video, and Most Compatible records JPEG and H.264 instead. It also says that sharing by AirDrop, Messages or email may convert the media to a more compatible format automatically if the recipient's device needs it.

Recording HEVC requires an iPhone 7 or later, per the same page. If an HEVC clip won't open somewhere, convert it rather than re-recording: MP4 vs MOV covers the conversion.

How do you convert H.265 to H.264?

You convert H.265 to H.264 by re-encoding the video stream; you can't just rename or remux it. Three ways:

• In your browser: open the video in the free video compressor. In a browser that can play the HEVC file (Safari, or Chrome and Edge on most recent hardware) and record MP4, it saves a new MP4 at up to 1080p. It's free, runs in your browser and never uploads your file, and takes as long as the video.
• HandBrake (free app): choose an H.264 preset such as Fast 1080p30 and start the encode.
• FFmpeg: ffmpeg -i in.mov -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 192k out.mp4. Lower CRF means higher quality and a bigger file; 18 to 23 is the usual range.

Re-encoding always loses a little quality, so convert from the original once rather than converting copies of copies.

When should you use H.265 instead of H.264?

Use H.265 when smaller files matter more than universal playback:

• Recording 4K, HDR or high frame rates on a phone or camera (it's often the default).
• Archiving or backing up large libraries of footage.
• Delivering to Apple devices, smart TVs or apps you know decode HEVC.
• Uploading to YouTube or Pinterest from a phone, when you don't want to convert first.

Use H.264 for everything that has to just work: social uploads from an editor, website video, email and chat attachments, and files you send to clients or editors. If you're weighing a third option, AV1 is royalty-free and efficient, and plays in all major browsers on recent devices, but encoding is slower still. For bitrates to pair with either codec, see the video bitrate guide.

Frequently asked questions

Is H.265 better than H.264?

It's more efficient: similar quality in a smaller file. H.264 is more compatible and faster to encode.

Does YouTube accept H.265?

Yes. HEVC (H.265) is on YouTube's list of supported formats, though its recommended upload settings specify H.264.

What about AV1?

AV1 is the royalty-free alternative from the Alliance for Open Media, published in 2018. It plays fully in Chrome, Firefox and Edge, where HEVC support is only partial, while Safari and older iPhones favour HEVC. YouTube's supported-formats list includes HEVC but not AV1. The full comparison is in AV1 vs HEVC.

Why won't my H.265 video play?

The device or browser lacks an HEVC decoder. Convert it to H.264, or play it in an app with HEVC support.

Is HEVC the same as H.265?

Yes. HEVC (High Efficiency Video Coding) and H.265 are two names for the same standard.

Does converting H.265 to H.264 lose quality?

A little, as with any re-encode. Use a high quality setting (CRF 18-20) and convert from the original.

Which is better for 4K?

H.265 for recording and storage, because 4K files are large; H.264 is still the safe choice for uploads and sharing.

Try it with your own video

Caption, translate and dub your videos without worrying about codecs: upload MP4 or MOV. Upload a video, check its transcript, and download captions or a captioned copy. QuickVeed plans start at $18/month, and new accounts get a 14-day trial with 250 credits, no card needed. Sign up or see pricing.

Sources

Competitor details in this post were checked against these public pages in October 2026. Products and prices change, so confirm with each vendor before you decide.

• YouTube Help: recommended upload encoding settings
• YouTube Help: supported YouTube file formats
• Apple Support: using HEIF or HEVC media on Apple devices
• Can I use: HEVC/H.265 video format