Hashtags are not a real discovery mechanism on Reddit — subreddits, search keywords, and flair are. This helper audits the hashtags you were about to add, flags the ones that hurt, and shows exactly how many characters they cost so you can keep your post lean and discoverable.
How it works
The tool splits your input on spaces, commas, and new lines, then validates each token:
- A valid tag starts with
#and contains only letters, numbers, and underscores. - Malformed tags (missing hash, spaces, or special characters) are flagged.
- Duplicate tags are detected case-insensitively.
It then sums the character cost — the length of every tag plus its separators — so you can see how much of your 300-character title or 40,000-character body the tags would consume.
Tips and notes
Because Reddit does not index hashtags, the best use of these characters is almost always more descriptive title words. Apply the subreddit’s required flair, which is Reddit’s actual tagging system, and reserve any hashtags for cross-posting context only. All counting happens locally in your browser.