What Power Thesaurus is

Select a word on any page, use the right-click menu, or open the toolbar popup to see synonyms, antonyms, and definitions from PowerThesaurus.org with one-click copy. A PRO membership adds infinite scrolling, priority lists, and part-of-speech filters.

Feature coverage

  • On-page synonyms for selected words
  • Right-click and toolbar lookup
  • PRO filters by part of speech

What stands out

  • Strong rating on a solid sample
  • Updated in September 2026
  • Simple, single-purpose tool

Tradeoffs to know

  • Broad data disclosure for a lookup tool
  • Advanced filters need PRO
  • On-page popups need access to every site

Permissions and privacy

Page access

On-page results work by watching for word selections on the pages you visit, which requires access to all sites. If you prefer, switch off the on-page tools from the toolbar icon and rely on the popup or right-click lookup, or limit Chrome site access to the sites where you write.

Data notes

The listing discloses personally identifiable information, personal communications, location, and website content. The extension's own privacy note says it processes only search queries and account login data and does not collect browsing history. Weigh the two before using it on sensitive pages.

Pricing

Free thesaurus lookups; optional paid PRO membership. Pricing and plan limits change more often than store metadata, so use the linked developer page as the final check before subscribing.

Alternatives

AlternativeGoogle DictionaryAlternativeWordtuneAlternativeQuillBot

Sources

We used the official Chrome Web Store listing and first-party developer material. Public metrics can change after the fact-check date.

  1. Chrome Web Store listing

    Rating, rating count, public users, version, update date, and publisher disclosures verified 2026-10-12.

  2. Power Thesaurus product documentation

    First-party product, feature, support, or project documentation used for workflow context.

  3. Extension Reviewer methodology

    How public claims, permissions, evidence, and tradeoffs are reviewed.

View in Chrome Web Store Developer site
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