Flux review
A free, privacy-minded extension for automatic webpage price conversion across major browsers.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Flux is a free, open-source browser extension for shoppers who want webpage prices converted into a chosen currency without copying values into a separate tool. It detects prices on ordinary pages, single-page applications and infinite-scroll sites, then displays conversions using selected base and target currencies. Because processing stays local and no account is required, Flux suits solo users and small teams that prefer a lightweight browser-based utility.
There is no subscription cost or paid tier: Flux is available as a free extension. Its live exchange-rate fetching is paired with local browser caching, with rates refreshed daily. Controls include global or per-site enable and disable settings, plus dark and light interface themes. The project is MIT-licensed and officially supports Chrome, Firefox, Edge and Chromium-based browsers, making it practical across common desktop browsing environments. Email and documentation are the listed support channels.
Flux’s narrow focus is also its main boundary. The extension covers 10 currencies, so shoppers working across a wider set of markets will need another converter. Daily rate refreshes may not suit workflows that depend on more frequent updates, and the browser-extension format keeps conversion tied to supported webpages rather than broader financial or mobile use. Choose Flux for automatic, local webpage conversion with minimal setup; consider an alternative if you need broader currency coverage, more frequent rates or tools beyond browser price display.
Flux pros and cons
- Where it wins
- Converts prices automatically on dynamic and infinite-scroll webpages
- Local caching and processing avoid tracking and account requirements
- Supports Chrome, Firefox, Edge and other Chromium-based browsers
- Where it doesn't
- Coverage is limited to 10 currencies
- Exchange rates refresh daily rather than continuously
- Browser-extension deployment does not cover non-browser workflows
Flux fact sheet, pricing and score →
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