Hashtag Deduplicator
Remove duplicate hashtags, ignoring case differences.
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What the Hashtag Deduplicator does
The Hashtag Deduplicator collapses repeated tags that differ only by capitalisation, which is the most common source of hidden duplicates in a tag block.
How it works
Each tag is normalised to a valid hashtag, compared in lowercase, and kept only on first appearance. Removed tags are listed so you can verify the result.
- 1Paste your hashtag block.
- 2Run the deduplicator.
- 3Confirm the removed list contains only true repeats.
- 4Copy the unique block.
- 5Store it as your canonical set.
Worked example
#Coffee and #coffee collapse into a single entry, with the second listed under removed.
Who uses it
- Cleaning a tag block merged from two posts
- Preparing a canonical brand tag set
- Fixing accidental repeats before publishing
- Auditing a long-running tag library
Best practices
- Clean casing first so the output is visually consistent.
- Deduplicate before counting tags against a platform limit.
- Keep the removed list until you have verified the output.
- Re-run after merging any two sets.
Honest limitations
Only exact matches after lowercasing are detected; near-variants such as singular and plural remain separate.
Frequently asked questions
- Are plurals treated as duplicates?
- No, #tip and #tips are different tags.
- Which casing survives?
- The first occurrence keeps its original casing.
- Does it add missing hashes?
- Yes, plain words are converted into valid hashtags first.