URL Mapper – Fuzzy Old→New Matcher

Client‑side tool that maps old URLs to new URLs using blended similarity (Levenshtein, token Jaccard, char‑3gram), with boosts for matching slugs/extensions. Nothing leaves your browser.

Privacy‑friendly · No uploads

Old URLs

CSV should have a column named url (or use first column). TXT: 1 URL per line.

New URLs

Same format as left.

Settings

Tip: press R to rerun
Scoring: 0.50× Levenshtein‑sim + 0.30× token‑Jaccard + 0.20× char‑3gram · Boosts: slug +0.08, extension +0.04, optional section bias · Depth penalty for large path differences. All client‑side.