Free Hashtag Density & Reach Analyzer

Last updated: October 12, 2026

Quick answer: A caption can carry the right hashtags and still underperform — too many tags for the platform, a duplicated tag, or one community-reported banned hashtag quietly limiting who sees your post. This free hashtag density analyzer audits any caption in your browser: hashtag count, hashtag density (what share of your caption is tags), duplicate tags, and flagged tags from a community-maintained restricted list — then scores it with a Reach Health Score and per-platform verdicts for Instagram, TikTok, X, LinkedIn, Facebook, and YouTube. The score is structural (count, density, duplicates, flags vs. each platform's limits) — an honest audit of what you wrote, not fabricated live reach numbers. Nothing is uploaded.

Paste your caption

Flagged tags come from a community-reported restricted list (last refreshed October 12, 2026). Platforms rotate these lists — treat flags as a warning to re-check before posting, not a guarantee. The Reach Health Score measures your caption's structure (count, density, duplicates, flags vs. platform limits); it is not live reach data.

✓ Free forever · ✓ No signup · ✓ Tool inputs stay in your browser — never sent to our servers.

How to Use the Hashtag Reach & Density Analyzer

Paste your full caption — words and hashtags together — into the box above.
Click Analyze. The tool extracts every hashtag and computes count, unique tags, density %, duplicates, and any flagged restricted tags.
Read your Reach Health Score and the per-platform verdict table — each network shows whether your tag count is on target, underused, a bit many, or over its hard limit.
Fix what the audit flags: delete duplicates, replace or drop flagged tags, and trim (or add) tags until each target platform reads 'on target'.
Re-run the analysis after edits and use Copy report to save the audit for your team or client.

Why Use Our Hashtag Reach & Density Analyzer?

Hashtag density math — what percentage of your caption is hashtags, the core 'is this post all tags?' check.
Duplicate detection — repeated tags add zero reach and eat your budget; they're flagged tag-by-tag.
Restricted-tag flagging — checks your tags against a community-reported restricted list (last refreshed October 12, 2026).
Per-platform verdicts — Instagram, TikTok, X, LinkedIn, Facebook, and YouTube, each with hard-limit and sweet-spot bands (e.g. YouTube ignores hashtags on videos with more than 15).
Reach Health Score — one 0–100 structural score with plain-language tips; honestly labeled as structure, never faked as live reach data.
100% client-side — paste captions with confidence; nothing leaves your browser, no account needed.

Common Use Cases

Pre-post audit: Paste the caption before publishing: one Analyze tells you if you're over Instagram's 30-tag limit or missing TikTok's sweet spot.
Restricted-tag cleanup: A client post's reach tanked? Run the caption through the checker to surface any community-reported restricted tags and swap them out.
Cross-posting adaptation: Write once, then re-audit per network — the same 20-tag caption that's fine on Instagram needs trimming for X or LinkedIn.
Campaign consistency checks: Agencies audit dozens of creator captions: Copy report gives a paste-ready audit for each one.
Recycling old captions: Re-run last quarter's winners before reposting — restricted lists rotate, and a tag that was fine in spring may be flagged now.

Hashtag Reach & Density Analyzer vs Alternatives

reeldrop.io's Hashtag Density Checker: A free, client-side checker in a small Instagram-tool suite: tag count, density, and banned-tag checking. Ours adds the Reach Health Score, duplicate breakdowns, per-platform verdicts across six networks, and a copyable audit report.
Display Purposes: The classic free related-hashtag discovery tool with banned-tag checking. It's a discovery engine — find new tags; ours is an auditor — check the caption you already wrote. Different job, complementary use.
All-Hashtag: A free suite: generator, creator, counter, and analytics from keyword input. Ours skips discovery entirely and focuses on the audit: density math, duplicates, flagged tags, and one clean report.
Talkwalker / InfluencerMarketingHub roundups: Well-researched listicles pointing at paid analytics platforms like RiteTag. If you want a paid dashboard with live engagement data, they're the right read — for a free, no-signup, in-browser caption audit, this page is.

Bottom line: discovery tools find hashtags; this page audits the caption you already wrote. For a quick, free, private check before you hit publish — count, density, duplicates, flagged tags, and a verdict per platform — run the analyzer above.

Frequently Asked Questions

What is hashtag density?

The share of your caption made up of hashtags, by characters. A 5% density is a captioned post with a few tags; a 60%+ density is a tag block with a caption attached. High density reads as spammy to viewers and algorithms alike, so the tool flags it.

Do banned or restricted hashtags hurt reach?

Community-reported restricted tags are tags platforms have limited or suppressed — posts using them can see reduced distribution or fail to surface under that tag. Instagram rotates its list, so this tool flags tags from a community-maintained list (refreshed October 12, 2026) as a warning to re-check, not a final verdict.

How many hashtags should I use per platform?

Instagram allows 30 per post but 3–15 performs best in practice; TikTok works best at 4–6; X/Twitter at 1–2; LinkedIn at 3–5; Facebook at 1–2; YouTube shows up to 15 but ignores hashtags entirely on videos with more than 15. The tool checks your count against all six.

Does this tool show real reach or impression data?

No — and any free browser tool claiming to would be faking it. The Reach Health Score is structural: your tag count vs. each platform's limits, density, duplicates, and flagged tags. Real reach data lives in each platform's own analytics.

Why do duplicate hashtags matter?

A duplicated tag contributes nothing — you already compete under it — while consuming your limited tag budget (especially on Instagram's 30-tag ceiling) and looking careless to viewers. The audit lists every duplicate so you can swap it for a new one.

Is pasting my caption safe?

Yes. The analyzer runs entirely in your browser with no server round-trip, no tracking, and no account. Your caption never leaves your device.