Bulk URL Validator

The Bulk URL Validator checks whether each URL in your list is structurally well-formed and tells you, line by line, which ones pass and which ones fail. For every failure it gives a specific reason, such as a missing protocol, an unsupported scheme, or a hostname with no dot, so you can fix the input instead of guessing.

It is a syntax validator, not a link checker. That means it never fetches any URL, so it cannot tell you whether a page returns an error or a redirect, but it also never makes a network request, works instantly on huge lists, and keeps your URLs completely private.

Everything runs locally in your browser using JavaScript, using the same URL parser browsers rely on. Developers cleaning imported data, marketers vetting a link list before a campaign, and anyone preparing URLs for another tool can catch malformed entries in bulk before they cause problems downstream.

Features

• Validates each URL's structure using the browser's own URL parser for accurate, standards-based results.
• Returns a per-line status of valid or invalid so you can see the whole list at a glance.
• Gives a specific reason for every invalid URL, such as missing protocol or no dot in the hostname.
• Optionally requires an http or https protocol, flagging other schemes as invalid for web use.
• Catches hostnames that lack a dot, a common sign of a typo or an incomplete address.
• Reports totals for valid and invalid URLs so you can gauge list quality quickly.
• Makes no network requests, so validation is instant and your URLs stay entirely private.

How to use Bulk URL Validator

1. Paste your URLs into the input box, placing one URL on each line.
2. Keep the require-protocol option on to insist on http or https, or turn it off to allow other schemes.
3. Read the results table showing each URL with a valid or invalid status.
4. Use the reason column to understand and fix any URLs marked invalid.
5. Export the table to CSV or copy it to feed the cleaned list into another step.

Benefits

• Developers clean imported URL data by catching malformed entries before they reach a database.
• Marketers vet a link list before a campaign so no broken-looking URLs ship to customers.
• Data teams filter out invalid URLs prior to a crawl or an API import that expects clean input.
• QA reviewers confirm that generated URLs follow the expected format across a release.
• Support staff quickly explain why a customer-supplied link is not being accepted.
• Because nothing is fetched, sensitive or internal URLs stay entirely on your device.

Structural validation answers a different question than link checking. It tells you whether a string is shaped like a valid URL, with a scheme, a host, and correctly encoded characters, but not whether the resource actually exists. That distinction matters because a perfectly valid URL can still return a 404, and a broken string can never be fetched at all.

The most common problems in real lists are easy to describe: a missing protocol so the parser cannot tell where the host begins, a scheme like ftp or mailto when you needed a web link, and a hostname with no dot that is almost always a typo. Naming the exact reason turns a vague failure into a quick, targeted fix.

All checks run in your browser with JavaScript using the same parser the browser itself uses, so results are accurate and no request is ever sent. This keeps internal URLs private and avoids rate limits, but remember that passing validation only guarantees correct structure, so pair it with a live link checker when you also need to confirm that each page responds.