Every time you compress a video, you are choosing a codec — even if you never see the setting. The codec decides how small your file gets, how good it looks, and, crucially, whether the person you send it to can actually play it. In 2026 three codecs dominate: H.264, H.265 (HEVC), and AV1. Here is what each one is good at, and a simple rule for picking the right one.
The Three Codecs at a Glance
| H.264 (AVC) | H.265 (HEVC) | AV1 | |
|---|---|---|---|
| Released | 2003 | 2013 | 2018 |
| File size vs H.264 | baseline | ~30–40% smaller | ~50% smaller |
| Plays everywhere? | Yes — virtually universal | Mostly — patchy on web and older devices | Modern devices and browsers; growing fast |
| Licensing | Effectively free for users | Complex, royalty-bearing | Royalty-free |
| Encoding speed | Fast | Moderate | Slow (improving with hardware) |
| Best for | Sharing with other people | Apple devices, 4K archives | Web streaming, future-proof storage |
H.264: The Compatibility King
H.264 is more than twenty years old, and that is exactly why it wins so often. Every phone, laptop, smart TV, email client, and chat app on the planet can decode it in hardware. An MP4 file with H.264 video and AAC audio is the closest thing digital video has to a universal format. It produces larger files than its successors, but when your goal is “send this to someone and have it just work,” H.264 is still the safest answer in 2026 — which is why it remains the default output at RedPandaCompress.
H.265 (HEVC): Great Compression, Complicated Life
H.265 delivers the same visual quality as H.264 at roughly 30–40% smaller file sizes, and it is the codec your iPhone uses when it records in “High Efficiency” mode. Inside the Apple ecosystem it is seamless. Outside of it, things get messy: patent licensing is split across multiple pools, so some browsers and apps never shipped full support. If you have ever sent a video that played fine on your iPhone but showed a black screen on a friend’s Android or in a web browser, HEVC licensing is very likely the reason.
AV1: The Royalty-Free Future
AV1 was built by the Alliance for Open Media — a group including Google, Netflix, Amazon, Apple, and Microsoft — specifically to escape HEVC’s licensing problems. It is royalty-free and compresses noticeably better: depending on content, AV1 can cut bandwidth by another 20–30% compared to H.265, and up to half compared to H.264. YouTube and Netflix already stream heavily in AV1, and hardware decoding now ships in recent iPhones, Android phones, and GPUs. Its main cost is encoding time: producing an AV1 file takes significantly longer than H.264, which matters when you are compressing on your own machine rather than in a data center.
So Which One Should You Use?
- Sending a video to another person (email, chat, Discord, a client): use H.264 in an MP4. Compatibility beats a smaller file that will not open.
- Archiving your own footage on a Mac or iPhone-centric setup: H.265 gives you real space savings with no playback pain inside the ecosystem.
- Publishing to the web or storing files you will keep for a decade: AV1 — the best compression, no licensing strings, and support only keeps growing.
- Not sure? H.264. Nobody has ever failed to open one.
FAQ
Is a codec the same thing as a file format?
No. MP4, MKV, and MOV are containers — boxes that hold video and audio streams. The codec (H.264, H.265, AV1) is how the video inside the box is encoded. An MP4 can contain any of the three, which is why “it’s an MP4” does not guarantee it will play.
Will H.264 become obsolete?
Not any time soon. Its hardware support is so universal that it plays the same role MP3 played in audio: newer formats are better on paper, but the old one refuses to die because it works everywhere.
Does compressing with a better codec lose quality?
All three are lossy codecs, but a more efficient codec loses less quality at the same file size. If you are targeting a fixed size — say 20 MB for an email — a newer codec simply gives you a better-looking result within the same budget.
Compress Without Worrying About Any of This
If all you want is a smaller video that plays everywhere, you do not need to memorize codec tables. RedPandaCompress picks sensible, universally compatible settings for you, runs entirely in your browser so your video never leaves your device, and it is free with no signup. Drop a file in and see the difference.
Fei is a skilled software engineer. He previously worked at Google and now at a startup. His expertise includes web media processing, cloud architecture, complex algorithms, and AI training and deployment. Beyond work, Fei enjoys diving into new knowledge and is a big fan of strategy games.