H.264 vs H.265 (HEVC) - which codec for short-form video?
H.264 is the universally accepted codec across all major creator platforms. H.265 (HEVC) gives ~30-50% smaller files at comparable quality but creator-platform acceptance is uneven. Choose H.264 unless you have a verified H.265 pipeline and a target platform that accepts H.265.
What differs
| Criterion | H.264 (AVC) | H.265 (HEVC) | Verdict | Origin |
|---|---|---|---|---|
| Platform support | Every creator platform accepts H.264. | YouTube accepts H.265; TikTok accepts H.265 in limited paths; LinkedIn accepts H.265; Instagram / Facebook / X: partial or no acceptance. | prefer-a | sourced / sourced |
| File size at equivalent quality | Baseline (100%). | ~30-50% smaller at comparable SSIM. | prefer-b | guidance / measured |
| Encoder compatibility | Every editor + browser + phone. | Newer editors + Safari + some Android; not universal. | prefer-a | sourced / sourced |
| Encode speed | Fast on most hardware. | Slower; HEVC encoders more compute-intensive. | prefer-a | guidance / measured |
| Browser playback | Universal. | Safari + some Android; not Chrome/Firefox native. | prefer-a | sourced / sourced |
Decision table
| Goal | Recommendation | Reasoning |
|---|---|---|
| Maximum compatibility (any platform) | prefer-a | H.264 is accepted everywhere. |
| Smaller file at same quality (YouTube / LinkedIn / TikTok) | prefer-b | H.265 yields ~30-50% smaller files; pipeline exists. |
| Browser playback + mobile share | prefer-a | H.264 plays everywhere. |
| Long-term archival / proxy | depends | Either works; H.265 saves storage. |
Recommendation
Choose H.264 for safety + universal compatibility. Choose H.265 only if you target YouTube / TikTok (limited) / LinkedIn and have a verified H.265 pipeline.
Measured vs sourced
Cells marked measured are Koldflux Media Lab measurements. Cells marked sourced derive from each platform / codec standards body. Cells marked guidance are expert guidance, not measured.
Sources
- https://en.wikipedia.org/wiki/High_Efficiency_Video_Coding
- https://support.google.com/youtube/answer/55744
Verified at 2026-09-19.
Lead path
Inspect my file: /tools/validate
Convert / make correct version: /tools/convert
Create all target versions: /tools/pack