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WP-SEO-Redirect-301 is a WordPress plugin that remembers your old urls and redirects users to the updated url, to prevent 404s when urls change
If you click on “SEO Redirect 301” menu link, you will see a list of old urls pointing to the new ones. Its here where you can delete ones you don’t want anymore.
Since version 1.9, you now get a sitemap that you can submit to google and bing. After installing the plugin, you can submit http://yoursite/301-sitemap.xml to google or bing.
Since version 1.8.0, you can now create custom urls in your admin post/page edit page. Login to your wordpress site, go to any post/page and scroll down. You should find a Meta Box called SEO Redirect 301s. If you submit a url here and then browse to this url, it will redirect you to the page/post your editing.
If you wish to manually submit a alias slug, make sure that you are using the Code Editor, not the Visual Editor. Edit the page or post, click on its 3 dots icon and click on Code Editor. Scroll down page until you see SEO Redirect 301s. Its here where you can manually enter in an alias slug.
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WP SEO Redirect 301

WP-SEO-Redirect-301 is a WordPress plugin that remembers your old urls and redirects users to the updated url, to prevent 404s when urls change

webcraftic

Ash Durham

This is an ADDON plugin to give further functionality to the plugin <a href="https://wordpress.org/plugins/simple-301-redirects/" rel="ugc">Simple 301 Redirects</a> plugin.
<a href="http://kingpro.me/plugins/support-plugins/simple-301-redirects-addon-bulk-uploader/" rel="nofollow ugc">Simple 301 Redirects – Addon – Bulk Uploader</a> adds an extra section to the settings tab 
to upload a CSV of old and new URL’s to input into the Simple 301 Redirects plugin. An example CSV is bundled in with the plugin to get you going quickly.
The plugin checks for duplicate old URLs and alerts you of these in the summary after your CSV has been processed.
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If you have any suggestions or would like to see a feature in the plugin, please let me know in the support forum.
Any issues you are having, I’d also love to know, so again, please let me know using the support forum.
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<h4>BIG THANKS</h4>
Many thanks to <a href="http://kingpro.me/" rel="nofollow ugc">Ash Durham</a>, for his great contribution to the development of this plugin. 
He has excellent projects, you can find out about them here <a href="http://twitter.com/kingproplugins" rel="nofollow ugc">@kingproplugins on Twitter</a>, <a href="http://facebook.com/kingproplugins" rel="nofollow ugc">KingProPlugins on Facebook</a> or <a href="https://plus.google.com/b/101488033905569308183/101488033905569308183/about" rel="nofollow ugc">King Pro Plugins on Google+</a>
<h4>Recommended our plugins</h4>
We invite you to check out a few other related free plugins that our team has also produced that you may find especially useful:
<ul>
<li><a href="https://wordpress.org/plugins/clearfy/" rel="ugc">Clearfy – WordPress optimization plugin and disable ultimate tweaker</a></li>
<li><a href="https://wordpress.org/plugins/comments-plus/" rel="ugc">Disable Comments for Any Post Types (Remove Comments)</a></li>
<li><a href="https://wordpress.org/plugins/cyrlitera/" rel="ugc">Cyrlitera – transliteration of links and file names</a></li>
<li><a href="https://wordpress.org/plugins/cyr-and-lat/" title="Cyr-to-lat reloaded" rel="ugc">Cyr-to-lat reloaded – transliteration of links and file names</a></li>
<li><a href="https://wordpress.org/plugins/disable-admin-notices/" title="Disable admin notices individually" rel="ugc">Disable admin notices individually</a></li>
<li><a href="https://wordpress.org/plugins/hide-login-page/" title="Hide login page" rel="ugc">Hide login page</a></li>
<li><a href="https://wordpress.org/plugins/webcraftic-updates-manager/" rel="ugc">Disable updates, Disable automatic updates, Updates manager</a></li>
<li><a href="https://wordpress.org/plugins/gonzales/" title="WordPress Assets manager, dequeue scripts, dequeue styles" rel="ugc">WordPress Assets manager, dequeue scripts, dequeue styles</a></li>
<li><a href="https://wordpress.org/plugins/robin-image-optimizer/" title="Robin image optimizer — save money on image compression" rel="ugc">Robin image optimizer — save money on image compression</a></li>
</ul>

Simple 301 Redirects – Addon – Bulk Uploader

Does the job very well. Prety strait forward.

Great

Adds on the ability to bulk upload 301 redirects via CSV to the Simple 301 Redirects plugin

WP SEO Redirect 301 vs Simple 301 Redirects – Addon – Bulk Uploader