Slug Uniqueness Validator🔒 100% local

Check slug availability. Privacy-first, no server uploads, no tracking.

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Slug Uniqueness Validator: related tools

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Checks a proposed slug against a list of slugs you already have and, on a collision, proposes the next free numeric suffix. The first item you enter is the candidate; everything after it, split on commas or line breaks and lowercased, is the existing set. The comparison is done in the page against only the list you paste.

Slug Uniqueness: how to use it

Type the slug you want first, then a comma or newline, then the slugs already in use.
Press Process. The output says either UNIQUE or CONFLICT, and on a conflict names the next free suffix.
Press Clear and repeat with the accepted slug added to the list.

Slug Uniqueness: worked example

My Post, my-post, my-post-2becomes

Slug:           "my-post"
Status:         ✗ CONFLICT - 2 existing slugs match or start with it.

Suggested:      my-post-3
Verified:       not in your existing list of 2.

Computed in Node. The suffix counter starts at 2 and steps up while 'my-post-2', 'my-post-3' and so on are already taken.

My Post, other-postbecomes

Slug:           my-post
Existing count: 1
Status:         ✓ UNIQUE - ready to use as-is.

URL: https://example.com/my-post

Slug Uniqueness: when to use it

Choosing the slug for a follow-up post when the original title has already been used.
Checking a batch of proposed slugs for near-collisions such as 'my-post' and 'my-post-2' before creating any routes.
Confirming that a hand-picked variant is not already in the list you exported from your CMS.

Slug Uniqueness: what it does not do

It only knows the slugs you paste. There is no lookup against your site, a sitemap or the wider web, so UNIQUE means unique within this list and nothing more.
The first line is always treated as the candidate, so entering a single slug reports it as unique against an empty set of zero existing slugs.
Conflict detection is a prefix test: any existing slug starting with the candidate plus a hyphen counts, so 'my-post-mortem' would be reported alongside 'my-post-2'.
The suggested suffix is numeric only. It does not consider a year, a category or a random tail, which the built-in tip itself recommends once a list grows past a hundred entries.

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