Give every old URL a deliberate destination.

PathHarbor is a working, local redirect-migration workbench for developers and small agencies reviewing a supplied old-to-new URL map before a website move. Bring your own URL inventory, inspect the proposed redirects, resolve rule-level issues and prepare configuration for human review. It is not a crawler, hosted redirect service or automatic deployment system.

What you can do

• Edit a migration workspace: set the old and new origins, select 301 or 302, and add, edit or remove source, target and note rows.

• Import with a preview: load rule CSVs and a separate source-catalog CSV, then explicitly append or replace. Quoted fields, commas, embedded newlines and UTF-8 BOMs are handled; malformed CSV is rejected instead of silently reshaping your data.

• Audit the supplied rules: surface invalid URLs, duplicate sources, conflicting destinations, self redirects, cycles, chains and unmapped catalog sources. Search the workspace, filter findings and inspect configured redirect hops.

• Keep matching explicit: view canonical URLs and exact request-URI behavior. Path, case, encoding, query order and query variants matter. An unlisted query-string variant is not automatically redirected.

• Prepare reviewed Nginx snippets: export a case-sensitive exact-request-URI map for the http context and a separate 301/302 return snippet for the matching old-origin server. Blocking errors prevent generation and warnings require acknowledgment. You must review, integrate and test the configuration yourself; PathHarbor never connects to or changes your server.

• Keep portable working files: download mapping CSV, findings CSV and full validated JSON workspaces; restore with an explicit replacement confirmation. Spreadsheet-like note cells are protected in CSV; JSON preserves original data.

• Save and report locally: keep one active workspace in IndexedDB, with an expected-revision check before each saved replacement. Open a read-only printable audit of the saved workspace. Use JSON files to exchange or retain other client projects.

What the download contains

The editable HTML/CSS/JavaScript application, dependency-free Python localhost launcher, original URL-audit and persistence engines, buyer setup/use guides, Nginx integration and data-safety documentation, commercial license, clean and deliberately problematic fictional samples, generated example configs and independent regression tests. The free demo is a static, read-only audit and sample data, not the full editable app.

Requirements and licence

Run locally with Python 3.10 or newer and a modern browser with IndexedDB. No runtime npm install, API key, paid account or external service is needed. Node.js 18 or newer is only for optional developer tests. The included licence permits use by one buyer business or for one named client project, including permitted modifications, local development and backups. Generated migration outputs may be used commercially. Source/template resale, general redistribution and multitenant hosting for others are not permitted. This is source software, not an installer or managed service.

Important limits

Analysis is limited to the rules and catalog you supply. It does not discover URLs, fetch destination status codes, follow live HTTP responses, check TLS or verify an actual migration. It does not flatten chains automatically, support user regex/wildcard input rules or guarantee rankings, traffic, completeness or sales. The Nginx exporter rejects literal dollar signs in target URLs rather than risk variable interpolation. Exact query/encoding/case semantics must fit your server and migration plan.

One active local workspace is stored per browser profile and origin, not in the Python server. Browser data is not encrypted or cloud-synced; clearing storage or changing the host/port/profile can make it unavailable. Keep JSON backups outside the browser. The save revision guard is not a team collaboration system. Hosting, server administration, installation service, future updates and ongoing support are not included.

The three previews use illustrative frames around the actual application with clearly fictional example data. No hardware is included. Created for Zantro offical.