Loading, filtering, inspecting, and exporting HAR (HTTP Archive) files — designed to help developers clean up network traffic data before 🤖 sharing it with AI assistants or for debugging. Think of this like 'fiddler' for AI, cleanup requests/responses feed it to AI.
When you capture network traffic in Chrome DevTools and export it as a .har file, you often get hundreds of requests — images, fonts, scripts, analytics pings — that are irrelevant to what you actually want to analyze.
HAR Helper lets you:
- 📁 Upload multiple HAR files and switch between them
- 🔍 Filter requests with a powerful expression editor (text search, property filters, AND/OR groups)
- 🏷️ Quick-filter by resource type, file extension, content tag, or domain
- 🔇 Suppress noise headers (cache-control, user-agent, sec-fetch-*, etc.) from view and export
- 📋 Copy filters from one archive to another
- 📤 Export a clean filtered HAR — or an AI-optimized plain text version with estimated token count
- 🔎 Inspect individual requests with syntax-highlighted bodies, gzip decompression, and base64 decoding
- Node.js 18+
- npm
git clone https://github.com/oleksiivasylenko/har-helper.git
cd har-helper
npm install
npm run devOpen http://localhost:5173 in your browser.
The built app is served at **http://localhost:3000**.
---
## Configuration
Copy `.env.example` to `.env` and adjust if needed:
```bash
cp .env.example .env
AUTH_TOKEN=default-user-token-12345
PORT=3000All data is stored locally in data/har-helper.db (SQLite). Nothing is sent to any external service.
| Feature | Description |
|---|---|
| Archive Management | Upload .har files, switch between archives, delete archives |
| Expression Editor | Tree-based filter with text search, property filters, AND/OR groups, highlight-only mode |
| Quick Filters | One-click hide by resource type (XHR, script, image…) or file extension |
| Tag Filters | Filter by content type: html, resp-json, req-json, payload, query, base64 |
| Domain Filters | Exclude specific hostnames from the view |
| Noise Headers | Built-in list of 40+ noisy headers; add custom ones; toggle per-archive |
| Copy Settings | Copy filters and export settings between archives (replace or merge) |
| Export: Filtered HAR | Download a clean .har with only selected entries and applied transformations |
| Export: AI Text | Download a compact plain-text version optimized for AI token efficiency |
| Token Estimation | Live estimate of export size in tokens (sidebar + export modal) |
| Request Inspector | Full request/response detail view with JSON highlighting, HTML rendering, gzip decode |
| Entry Selection | Per-row checkboxes to include/exclude individual entries from export |
| Response Exclusion | Exclude response body per entry while keeping the request |
Full documentation is in the docs/ directory:
- Archive Management
- Filtering
- Export
- Noise Headers
- Copy Settings
- Request Inspector
- Architecture & API Reference
- Frontend: SolidJS + TypeScript, built with Vite
- Backend: Express.js (Node.js)
- Database: sql.js (SQLite, file-based, no install required)
Ideas, bug reports, and pull requests are welcome!
If you have a feature idea or found something that could be improved — open an issue or submit a PR. The project is intentionally simple and focused, so contributions that keep it lean and useful are most appreciated.
- request history tree (how come we get here with this token etc.)
- api/mcp so AI can analize reuqest and ask details for some specific requests (not handling all requests inside context window)
MIT