You’re migrating a website and you’ve got hundreds or thousands of old URLs to redirect. If you don’t map them correctly, you’ll lose traffic, rankings, and revenue.
Manually building redirect rules is slow, and guessing where pages should go leads to 404s. The real issue is that most people think redirects are just technical cleanup — they’re not. They’re how Google reconnects your old content to your new site.
Bulk Redirect Mapper is a free browser-based tool that generates redirect mapping templates from your legacy URLs and new site destinations. It takes two lists — your old URLs and your new ones — and matches them intelligently based on patterns, keywords, and structure.
You don’t need to install anything or log in. It works in your browser, and it’s free.
Why It Matters for SEO
Wrong redirects kill SEO. A 404 page doesn’t just annoy visitors — Google sees it as a signal that your site is poorly maintained. Sites with more than 10% 404 rates lose up to 30% of their organic traffic within 60 days.
If you redirect all old blog posts to your homepage, that’s a soft 404. Google won’t index those old pages anymore, and you’ll drop out of rankings. Most people miss that even a chain of three redirects (e.g., 301 → 301 → 200) adds load time and increases crawl errors.
Google recrawls most sites every 3-7 days. The longer bad redirects stay live, the more ranking damage you take.
How to Use It
- Go to https://scrawl.tools/tools/bulk-redirect-mapper (no login needed)
- Paste your old URLs in the left column, your new URLs in the right. You can upload a CSV or copy-paste from a spreadsheet.
- Click “Map Redirects” — the tool matches pairs, flags unmatchable URLs, and exports a clean .csv or .htaccess file.
It’s fast. You’ll have a redirect plan in under two minutes. And it’s free — no trial, no paywall, no email capture.
What the Results Tell You
You get a table showing old URL, suggested new URL, match confidence (high, medium, low), and reason (e.g., “slug match,” “keyword similarity,” “domain change”). Low-confidence matches need manual review — don’t ignore them.
The export includes ready-to-use rules for Apache (.htaccess), Nginx, or CDN platforms. You can also fix mismatches directly in the tool before exporting. This isn’t guesswork — it’s pattern-based logic that mimics how you’d map by hand, just faster.
3 Mistakes Most People Make
- Redirecting everything to the homepage. That’s not a redirect — it’s a traffic trap. Google knows the homepage isn’t the real destination for a blog post about “best hiking boots 2018.” That mismatch kills topical relevance.
- Using wildcards too broadly. Yes, /blog/ → /articles/ is fast, but it breaks when old URLs have different structures. You end up with /blog/category/old-post going to /articles/old-post — that’s a 404 waiting to happen.
- Not validating after launch. Pushing redirects is step one. Checking that they work is step two. Run your new site through the Redirect Chain Checker and Broken Link Checker within 48 hours.
Most people think the migration ends when the redirect file is uploaded. Here’s what actually happens: Google crawls your new site, finds broken chains, drops pages from the index, and you don’t notice for weeks.
Fix redirects before you launch. Not after.
Try it now at https://scrawl.tools/tools/bulk-redirect-mapper — free, no login, works in any browser.