How to Shorten Multiple URLs at Once: The Complete Bulk Shortening Guide

· Guides · 5 min read

Save hours by shortening up to 50 URLs in one go. Learn how to use Alias's bulk URL shortener — upload a CSV, get a results CSV, all free.

If you are a marketer, agency, or developer who regularly creates dozens of short links, shortening them one by one is a time sink. Alias's bulk shortening tool lets you shorten up to 50 URLs in a single batch — paste a list or upload a CSV, and download the results in seconds.

Why Bulk Shortening Matters

Email campaigns, social media calendars, and affiliate programmes often involve dozens of unique links. Manually shortening each one takes minutes — and mistakes creep in. Bulk shortening turns a tedious process into a one-click operation.

How to Bulk Shorten URLs with Alias

  1. Log in to your Alias account and go to the Bulk page from the navigation bar.
  2. Prepare a CSV with two columns: destination (required) and slug (optional custom alias). A header row is optional.
  3. Upload the CSV file, or paste the list directly into the text area.
  4. Click "Shorten All" — Alias processes all URLs simultaneously, isolating any errors so one bad URL does not block the rest.
  5. Review the results table. Each row shows the original URL, the short URL, or an error message if the slug was already taken.
  6. Click "Download CSV" to export the full results for your records or to hand off to a client.

CSV Format

The simplest format is one URL per line. For custom slugs, add a second column separated by a comma:

  • One URL per line: https://example.com/page-one
  • With custom slug: https://example.com/page-one,my-slug
  • Header row is optional: destination,slug
  • Leave the slug column blank for a random alias.
  • Maximum 50 URLs per batch.

How Errors Are Handled

Alias processes every URL independently. If one slug is already taken, that row shows an error — but every other URL in the batch still succeeds. You can fix errors and re-submit just the failed rows.

Bulk Shortening via API

Developers can trigger bulk shortening programmatically using the Alias API or the official TypeScript SDK. A single POST request to /api/v1/links/bulk with up to 50 items returns the results in one response.

Who Is Bulk Shortening For?

  • Email marketers building campaign link lists.
  • Social media managers scheduling a week of posts.
  • Affiliate marketers shortening product links in bulk.
  • Agencies delivering branded short links to clients.
  • Developers automating link creation in scripts or pipelines.

Try bulk shortening free