---
page: htroot/IndexBrowser_p.html
help: help/IndexBrowser_p.md
title: Index Browser
package: index-management
access: admin
kind: admin-page
backend_java: source/net/yacy/htroot/IndexBrowser_p.java
---

# Index Browser

## Purpose

The Index Browser is the diagnostic view for known URLs and hosts. It helps answer whether YaCy has stored a document, which host/path is involved, and what can be inspected or removed.

Use it after crawling when search results do not match expectations.

The page has three layers: a host/path browser for finding stored URLs, analysis views for link and host structure, and administration actions for removing or reloading selected data.

## What You Can Do Here

- Inspect whether a host, path, or exact URL is present in YaCy's URL database.
- Work from the narrowest host, path, query, or field scope that answers the question.
- Open link-structure views to understand why a document was discovered and how it connects to other pages.
- Reload failed documents such as stored 404/load errors when the failure may have been temporary.
- Confirm destructive actions carefully because index maintenance can remove documents or start expensive reprocessing.

## Page Architecture

Index pages expose stored documents through URL, host, path, Solr field, or queue views. Read-only inspection and destructive maintenance often share the same page, so the target scope matters more than the button label.

| Control | Meaning | Values or examples |
| --- | --- | --- |
| `path` | URL path, URL prefix, or host/path scope. In index tools it decides which part of the stored URL tree is inspected or changed. | URL, host/path prefix, or path scope shown by the page. |
| `list` | Requests a list view for the selected host or path scope. | Usually sent with `path`; the value can be left as the button value generated by the form. |
| `delete` | Deletes the selected object or scope. Use only with explicit confirmation. | `Delete Subpath` |
| `reload404` | Queues failed documents such as 404/load-error entries for another load attempt. | `Re-load load-failure docs (404s etc)` |
| `addtoblacklist` | Adds the selected URL or host pattern to the configured blacklist. | Submit only after confirming that the selected host/path should be blocked. |
| `showlinkstructure` | Shows incoming and outgoing link structure for the selected host or path. | `show link graph` |
| `deleteLoadErrors` | Deletes stored load-error records for the selected scope. | `Delete Load Errors` |

## Correct Use

Inspect before changing. Start with a host or path lookup, then use `complete` only when the shortened view hides the information you need. Use `facetcount` carefully: larger values give a broader host/path analysis but force YaCy to calculate more facets.

For deletion, blacklisting, and load-error cleanup, copy the target from the page rather than inventing it. A path such as `example.org/docs/` and a broader host such as `example.org/` can have very different effects.

## Access And Safety

Administrator access is required. YaCy protects `_p` pages as administration pages.

Protected related endpoint(s): `/IndexBrowser_p.html`.

## Automation And API

Page backend: `source/net/yacy/htroot/IndexBrowser_p.java`.

| Endpoint | Method | Access | Backend |
| --- | --- | --- | --- |
| `/IndexBrowser_p.html` | `GET` | admin | `source/net/yacy/htroot/IndexBrowser_p.java` |

### Parameter Guide

The table explains values that an agent or script must set deliberately. Parameters not relevant to a task should be omitted or left at the page default.

| Parameter | Meaning and valid values | Care |
| --- | --- | --- |
| `path` | URL path, URL prefix, or host/path scope. In index tools it decides which part of the stored URL tree is inspected or changed. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |
| `list` | Requests a list view for the selected host or path scope. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |
| `delete` | Deletes the selected URL, path, or index scope. Confirm the scope first. | Can remove data, stop work, expose access, or make a broad operational change. Use only with explicit confirmation and an exact target. |
| `reload404` | Queues failed documents such as 404/load-error entries for another load attempt. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |
| `addtoblacklist` | Adds the selected URL or host pattern to the configured blacklist. | Changes stored data, configuration, or a running job. Use the authenticated action flow where required and verify the result. |
| `showlinkstructure` | Shows incoming and outgoing link structure for the selected host or path. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |
| `deleteLoadErrors` | Deletes stored load-error records for the selected scope. | Can remove data, stop work, expose access, or make a broad operational change. Use only with explicit confirmation and an exact target. |
| `complete` | Requests a complete listing instead of YaCy’s shortened default view. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |
| `facetcount` | Maximum number of host/path facets to calculate. Higher values give broader analysis but cost more work. | Controls the scope or format of the result. Prefer the narrowest value that answers the request. |
| `hosts` | Host list filter. Values such as `crawling` or `error` restrict the host overview to active crawl hosts or error hosts when supported. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |
| `load` | Loads the selected URL, host, or path detail view. | Set only when this option is part of the intended request; otherwise omit it and let YaCy use the page default. |

Example request shape:

```http
GET /IndexBrowser_p.html?path=example.org/docs/&list=1&facetcount=50
```

## What To Expect

The response shows the selected URL tree, host overview, or link graph. Destructive actions re-render the page after changing stored index metadata; verify the resulting scope immediately and use search to confirm whether user-visible results changed.

## Related Pages

- `ViewFile.html`