H5EQ is an open-source project built for firefox and Chrome users who want browser audio equalization.

Yes — H5EQ is open source under the Open Source license and free to use.

What platforms does H5EQ run on?

H5EQ runs on the web and embeddable surfaces.

Is H5EQ still active?

Unverified. H5EQ 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.

What are alternatives to H5EQ?

Similar projects tracked by PulseGate include StepPolyArp-app, Chord Roulette, and Mozaic Plugin Workshop.

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H5EQ

Name: H5EQ
Author: pulse0ne

github.comMusic production & plugins

H5EQ is an open-source browser extension that provides a 10-band equalizer for adjusting audio playback in Firefox and Chrome. It is intended for users who want to customize browser audio frequencies without installing a full desktop audio workstation.

Open SourceWebEmbeddable

Visit github.com

Overview

5 features

In the Music production & plugins space, H5EQ takes a focused approach. It focuses on improving browser audio by adjusting frequency bands with a customizable equalizer. It is built as an open-source project for firefox and Chrome users who want browser audio equalization. The project is open source (Open Source). H5EQ is available on the web and embeddable surfaces.

pulse0ne builds and maintains H5EQ, and it first shipped in 2018. Among its 5 catalogued features are 10-band equalizer, frequency adjustment, and browser audio control.

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

10-band equalizer
Frequency adjustment
Browser audio control
Firefox support
Chrome support

Built with & integrations

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 · 22:59 UTC
H5EQ verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about H5EQ

What is H5EQ?: H5EQ focuses on improving browser audio by adjusting frequency bands with a customizable equalizer. It is catalogued under Music production & plugins on PulseGate.
Who should use H5EQ?: H5EQ is an open-source project built for firefox and Chrome users who want browser audio equalization.
Is H5EQ free?: Yes — H5EQ is open source under the Open Source license and free to use.
What platforms does H5EQ run on?: H5EQ runs on the web and embeddable surfaces.
Is H5EQ still active?: Unverified. H5EQ 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.
What are alternatives to H5EQ?: Similar projects tracked by PulseGate include StepPolyArp-app, Chord Roulette, and Mozaic Plugin Workshop.StepPolyArp-app Chord Roulette Mozaic Plugin Workshop
Who makes H5EQ?: H5EQ is developed by pulse0ne.
How long has H5EQ been around?: H5EQ first shipped in 2018.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 9 Sept 2026
Built for: Firefox and Chrome users who want browser audio equalization
Model: Open source
Solves: Improving browser audio by adjusting frequency bands with a customizable equalizer.

Registered as

Firefox Add-ons: h5eq

Developer

pulse0ne

Index record

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

Identity audit (13)

Slug: h5eq-github-com
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/pulse0ne/H5EQ

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