HAR Analyzer

Dify plugin for analyzing HTTP Archive (HAR) files — network traces exported from browser DevTools. Give it a file and get a structured web performance and error report: timing metrics, resource weight, failed requests, and suspicious responses, ready to be fed into an LLM for optimization recommendations.

Source code: https://github.com/neyara11/dify-plugin-har_analyzer

What it analyzes

A HAR file records every HTTP request a page makes: URLs, headers, timings, status codes, and response bodies. The plugin parses this trace and produces:

Performance metrics

TTFB (time to first byte) and approximate FCP (first contentful paint)
Total load time and number of loaded resources
Per-request timing breakdown (DNS, connect, SSL, send, wait, receive)

Resource breakdown by type

HTML, CSS, JavaScript, images, audio, video, JSON, other
Size and load time per type (compression-aware: compressed and decompressed sizes are handled correctly)

Errors and diagnostics

HTTP 4xx/5xx responses
Aborted, blocked, or CORS-failed requests (status 0)
Application-level errors hidden behind HTTP 200/3xx — JSON payloads with // fields and text bodies containing stack traces or "Internal Server Error"
For every error: request/response headers and a response body preview

Warnings and insights

Duplicate requests (same URL fetched repeatedly)
Top domains by request count
Top slowest requests
Cache and compression status per request (, , , , 304/cached)
Browser name, version, hostname, and User-Agent of the captured session

How it works

Record the session: open browser DevTools → Network tab → reproduce the issue → Export HAR (Chrome/Edge: download arrow; Firefox: "Save All As HAR").
In Dify, run the Analyze HAR File tool and upload the file.
Pick an output format and pass the result to an LLM node for analysis, or use it directly in a workflow.

All parsing happens inside your Dify deployment. See PRIVACY.md for data handling details.

Parameters

Parameter	Type	Required	Description
	file	Yes	The file exported from browser DevTools
	select	No	(default), , or

Output formats

— human-readable report

— full structured data for workflows

Large results are truncated with a note when they exceed 50 KB; use for a complete overview.

— quick diagnostics

Only errors, warnings, and duplicates, each with full request/response headers and a response body preview. Useful for failed-request triage.

Example workflow

Typical use cases: website performance audits, regression analysis after a release, diagnosing failed or slow API calls, and feeding network evidence into an incident review.

Installation

From the Marketplace (once published): search for "HAR Analyzer" in Dify → Plugins → Marketplace and click Install.

Manual upload: Dify → Settings → Plugins → Install Plugin → Upload, then select from the releases of the source repository.

No API keys, credentials, or external service accounts are required.

Development

Build the package with (or ).

License

Apache 2.0