h264ify is an open-source project built for youTube viewers using browsers with H.264 playback or performance constraints.

Yes — h264ify is open source under the Open Source license and free to use.

What platforms does h264ify run on?

h264ify runs on the web and embeddable surfaces.

Is h264ify still maintained?

Unverified. h264ify has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

h264ify is developed by erkserkserks.

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h264ify

Name: h264ify
Author: erkserkserks

github.comBrowser DevTools & extensions

h264ify is an open-source browser extension that makes YouTube serve H.264 video instead of VP8 or VP9. It is intended for viewers who need broader codec compatibility or lower playback resource usage, and is available for Chrome, Firefox, and Edge.

Open SourceWebEmbeddable

Visit github.com

1alternative

5features

2020since

Overview

5 features

h264ify sits in PulseGate's Browser DevTools & extensions category. It focuses on reducing YouTube playback resource usage and improving compatibility by forcing H.264 video streams. It is built as an open-source project for youTube viewers using browsers with H.264 playback or performance constraints. h264ify is open source under the Open Source license. h264ify is available on the web and embeddable surfaces.

erkserkserks builds and maintains h264ify, and it first shipped in 2020. Among its 5 catalogued features are H.264 forcing, VP8 blocking, and VP9 blocking.

Summary written by a language model from the project’s public pages.

H.264 forcing
VP8 blocking
VP9 blocking
YouTube playback
Codec compatibility

Built with & integrations

Connectors

chrome

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed9 Sept · 03:25 UTC
h264ify verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about h264ify

What does h264ify do?: H264ify focuses on reducing YouTube playback resource usage and improving compatibility by forcing H.264 video streams. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is h264ify for?: h264ify is an open-source project built for youTube viewers using browsers with H.264 playback or performance constraints.
Is h264ify free?: Yes — h264ify is open source under the Open Source license and free to use.
What platforms does h264ify run on?: h264ify runs on the web and embeddable surfaces.
Is h264ify still maintained?: Unverified. h264ify has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
Who makes h264ify?: h264ify is developed by erkserkserks.
How long has h264ify been around?: h264ify first shipped in 2020.
Is h264ify open source?: Yes — h264ify is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 9 Sept 2026
Built for: YouTube viewers using browsers with H.264 playback or performance constraints
Model: Open source
Solves: Reducing YouTube playback resource usage and improving compatibility by forcing H.264 video streams.

Registered as

Firefox Add-ons: h264ify-embed-fix

Developer

erkserkserks

Index record

Indexed: 9 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 9 Sept 2026

Identity audit (13)

Slug: h264ify-github-com-1bmqpp
Lifecycle state recorded: 9 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 9 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 9 Sept 2026
Canonical URL: https://github.com/erkserkserks/h264ify

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