Hashtag.org Hashtag Metrics

Hashtag.org Hashtag Metrics is a free web service with a JSON endpoint for examining hashtag activity on Mastodon and Bluesky. It suits researchers, publishers, and developers who need recent figures without creating an account. Its strongest case is transparent, source-labelled data; its main constraint is that it does not measure the largest commercial social platforms.

Overview

The service combines usage counts, related tags, top posts, engagement measures, and posting-hour indicators in one hashtag lookup. A directory of 1,251,230 measured tags gives it substantial breadth for discovery, whether you are checking an established term or exploring adjacent tags. Access is immediate because the page requires no login and is free to use.

The figures are intentionally network-specific. Mastodon counts come from public tags, trends, and search APIs, while Bluesky post metrics come from its public search API. Every displayed figure carries a named source and fetch time; when a value cannot be measured, the service shows a dash rather than implying precision. That makes the output easier to interpret, although it also means the numbers should not be treated as a single, directly comparable cross-network score.

The site also promotes claiming a hashtag as a #name on the hashtag.org network through an auction with public bids. That promotion is separate from the analytics lookup and does not add measurement coverage.

Key features

Recent activity signals

Mastodon usage counts cover roughly a seven-day window, providing a current view of activity rather than a long historical series. Bluesky metrics use the latest sample of posts, so they likewise indicate recent conversation. This is useful for timely discovery and editorial decisions, but less suitable for trend analysis that requires consistent history over months or years.

Source and fetch transparency

Named sources and fetch times accompany each figure, giving analysts context for judging freshness and provenance. Dashes for unmeasurable values prevent unsupported estimates. Readers who need auditable snapshots will value this clarity more than a dashboard that hides how its numbers were obtained.

Web and developer access

The browser interface supports hashtag discovery, while the same metrics are exposed as JSON at /api/hashtags/<tag>. Developers can therefore incorporate the service's outputs into their own workflows without paying for a separate API plan. The endpoint does not expand the underlying network coverage: X, Instagram, and TikTok figures remain absent because their numbers sit behind paid APIs.

Pricing

Hashtag Metrics — free. The free plan requires no login and includes the service's hashtag metrics and discovery access. It does not provide estimates, and metrics for X, Instagram, or TikTok are not shown. This is an unusually simple fit for individuals, small teams, and developers who only need Mastodon and Bluesky signals. There are no paid tiers or seat, quota, renewal, or trial terms published for this plan, so organizations needing broader coverage cannot upgrade within this product.

Platforms

Hashtag.org Hashtag Metrics runs on the web and provides API access. The API option is particularly relevant to developers automating lookups; the web page is the straightforward choice for manual exploration.

Who it's for

Choose it for quick, no-account hashtag research focused on Mastodon and Bluesky, for source-aware editorial checks, or for lightweight integrations using JSON. It is also a practical discovery catalogue when you want to browse a very large set of measured tags.

Look elsewhere if your reporting must include X, Instagram, or TikTok, or if you need a unified historical dataset across networks. The separate Mastodon and Bluesky windows make it better for recent snapshots than for standardized longitudinal measurement.

Pros and cons

Pros

• Free and frictionless: no login is required, so a reader can move from a tag idea to a result immediately.
• Traceable figures: each metric names its source and fetch time, with dashes instead of invented values.
• Developer-ready: the JSON endpoint exposes the same measurements for automated use.
• Broad discovery catalogue: 1,251,230 measured tags support extensive exploration.

Cons

• Limited network scope: X, Instagram, and TikTok metrics are omitted, ruling it out for mainstream cross-platform reports.
• Short, differing windows: Mastodon's roughly seven-day counts and Bluesky's latest-post sample are snapshots, not a shared long-term baseline.
• No paid expansion: there is no higher plan for additional platforms or published organizational controls.

Alternatives

Social Media Hashtag Tracking Software is the broader starting point when you want to compare dedicated tracking products rather than use one free Mastodon-and-Bluesky service.

Circleboom Twitter Hashtag Tracker is the better fit for Twitter-focused work, with iOS, macOS, and web access and a free tier that includes a Twitter Search Tool for one profile.

HashtagsForLikes suits users who want paid search and campaign analytics, including unlimited searches and advanced trends in its $19-per-month Pro plan.

Keyword Tool is aimed at larger, multi-platform keyword operations, with paid plans offering request, keyword, history, and platform allowances.

Socialcrab is an alternative for web-based post reporting, with a free Explore allowance and paid monthly plans.

TikTok Symphony Creative Studio is the relevant choice when your priority is TikTok video creation rather than hashtag measurement.

Genni provides web tracker and growth-report features for readers seeking a tracker-oriented workflow.

Task Ant is a free web option for unlimited hashtag sets with no account and no paid version.

RiteTag is better for cross-device hashtag suggestions, offering Android, iOS, browser extensions, and web access with a $49-per-year plan.

Verdict

Choose Hashtag.org Hashtag Metrics if you need free, source-labelled Mastodon and Bluesky data, quick tag discovery, or a simple JSON feed without signing in. Look elsewhere when your decision depends on X, Instagram, or TikTok coverage, or on consistent long-term comparisons across networks.