Run redirect-map-lint in your browser

Runs fully in your browser, files never leave your device.

Drag and drop your redirect CSV here, or use the picker below.

1. Redirect CSV (source,target or from,to or old,new) Or paste redirect CSV Homepage threshold (share between 0 and 1, default 0.3)

A warning fires when more than this share of targets point at the homepage (/).

Report

What it does

Redirect chains detected and collapsed, so every source points at the final destination

Loops, including two-node loops and longer cycles, excluded from the fixed CSV with a reason

Duplicate sources split into exact duplicates and conflicting duplicates, and conflicting rows are excluded

Self-redirects and normalisation collisions, where case, a trailing slash or percent encoding makes different looking sources resolve to the same path

Homepage dumping warning when the share of targets pointing at / passes a configurable threshold, 30 percent by default

Install and usage

Requires Node.js 20 or later. There are no dependencies to install.

git clone https://github.com/aamirtechs/redirect-map-lint.git
cd redirect-map-lint
node src/cli.js examples/redirects.csv --out-dir output

Input is a two column CSV with source and target headers (from/to and old/new are also accepted, and a headerless file is read as source then target). Output is fixed-redirects.csv and report.md. Fully offline, no network calls.