What is HAR File Viewer?

HAR File Viewer focuses on inspecting and analyzing HAR network log files without leaving the browser. It is catalogued under Browser DevTools & extensions on PulseGate.

Who should use HAR File Viewer?

HAR File Viewer is a consumer product built for web developers and network engineers.

Is HAR File Viewer free?

Yes — HAR File Viewer is free to use.

What platforms does HAR File Viewer run on?

HAR File Viewer runs on the web and embeddable surfaces.

Is HAR File Viewer still maintained?

Unverified. HAR File Viewer 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 HAR File Viewer?

Similar projects tracked by PulseGate include HAR/JSON viewer, HTML File Viewer, and Headers Viewer.

Who makes HAR File Viewer?

HAR File Viewer is developed by 88CLB.

How long has HAR File Viewer been around?

HAR File Viewer first shipped in 2024.

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HAR File Viewer

Name: HAR File Viewer
Author: 88CLB

mozilla.orgBrowser DevTools & extensions

HAR File Viewer is a Firefox extension that opens and analyzes HTTP Archive (.har) network log files directly in the browser. It is intended for developers and technical users troubleshooting web requests and browser network activity.

FreeWebEmbeddable

Visit mozilla.org

1alternative

4features

2024since

Overview

4 features

In the Browser DevTools & extensions space, HAR File Viewer takes a focused approach. It focuses on inspecting and analyzing HAR network log files without leaving the browser. HAR File Viewer is a consumer product aimed at web developers and network engineers. HAR File Viewer is free to use. HAR File Viewer is available on the web and embeddable surfaces.

It is developed by 88CLB, and it first shipped in 2024. Key capabilities include HAR file viewing, network log analysis, and browser-based inspection. The interface is available in 32 languages, including Czech, German, and Greek.

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

HAR file viewing
Network log analysis
Browser-based inspection
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed13 Sep · 21:13 UTC
HAR File Viewer verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about HAR File Viewer

What is HAR File Viewer?: HAR File Viewer focuses on inspecting and analyzing HAR network log files without leaving the browser. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use HAR File Viewer?: HAR File Viewer is a consumer product built for web developers and network engineers.
Is HAR File Viewer free?: Yes — HAR File Viewer is free to use.
What platforms does HAR File Viewer run on?: HAR File Viewer runs on the web and embeddable surfaces.
Is HAR File Viewer still maintained?: Unverified. HAR File Viewer 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 HAR File Viewer?: Similar projects tracked by PulseGate include HAR/JSON viewer, HTML File Viewer, and Headers Viewer.HAR/JSON viewer HTML File Viewer Headers Viewer
Who makes HAR File Viewer?: HAR File Viewer is developed by 88CLB.
How long has HAR File Viewer been around?: HAR File Viewer first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: web developers and network engineers
Model: B2C
Solves: Inspecting and analyzing HAR network log files without leaving the browser.

Registered as

Firefox Add-ons: har-file-viewer

Developer

88CLB

Index record

Indexed: 13 Sep 2026
Lifecycle: Alive
Last seen: 13 Sep 2026

Identity audit (13)

Slug: har-file-viewer-mozilla-org
Lifecycle state recorded: 13 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 13 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
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: 13 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/har-file-viewer

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