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Open Source Currency Converter

Free#85 of 100 in Currency Converter Apps

Open Source Currency Converter: A focused, open-source Chrome tool for converting prices directly within webpages. Ranked #85 of 100 in Currency Converter Apps by our editors (3.0/10); pricing: Free plan; best for desktop shoppers converting prices directly on webpages.

3.0/10Editor score

View project

Open Source Currency Converter3.0 View project

At a glance

Editor score
3.0 / 10
Pricing
Free plan
Best for
Desktop shoppers converting prices directly on webpages
Free plan
Yes
Paid from
Free
Facts checked
20 Oct 2026

Where it wins
- Detects symbols, ISO codes, names and varied number-grouping formats
- Converts embedded frames and open shadow roots
- Caches daily ECB rates for offline conversion
Where it doesn't
- Chrome extension scope limits use to browser-based workflows
- Daily rate refreshes may not suit intraday exchange needs
- Documentation is the listed support channel

Our verdict on Open Source Currency Converter

Open Source Currency Converter is a Manifest V3 Chrome extension for shoppers and other desktop users who need to interpret foreign prices while browsing. It detects currency symbols, ISO codes and currency names directly on webpages, then converts amounts without requiring a separate converter tab. Hybrid mode can convert detected prices across a page and offer selection tooltips, while interactive mode converts selected currency text without changing the page.

Its strongest differentiator is coverage of difficult webpage content. The extension supports US, European, Indian and Swiss number grouping, negative amounts, refunds and compact values, and it can process prices inside embedded frames and open shadow roots. Site-specific disabling and animation controls provide per-site behavior settings. Exchange rates come from the European Central Bank on a daily refresh schedule, with rates cached locally for offline use. Settings can synchronize through Chrome storage, keeping the tool aligned with its browser-based workflow.

The project is open source, released under the MIT License, and offers a free plan. That makes it suited to solo users and small teams seeking a focused webpage conversion utility rather than a broader currency platform. Its Chrome-only deployment and browser-specific interaction model will be limiting for people who need mobile, desktop-native or multi-platform conversion. Daily ECB updates also may not fit decisions requiring intraday rates, while documentation is the listed support channel. Choose it for in-page shopping and research; consider a broader converter when you need wider platform coverage or more frequent rate updates.

Your product? Our editors can test Open Source Currency Converter in depth and publish a review, labelled as paid · from $149/mo →

Open Source Currency Converter pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on github.com

Open Source Currency Converter fact sheet

Free plan	Yes
Paid from	Free
Currencies supported	Not verified
Rate refresh frequency	Daily
Offline mode	Yes
Rate alerts	Not verified
Historical rate charts	Not verified
Available platforms	Web
Deployment	Browser extension
Platforms	Chrome extension
Support	Docs
Built for	Solo, Small business (editorial estimate)
Pricing	Free plan
Website	github.com
Facts checked	20 Oct 2026

Alternatives to Open Source Currency Converter

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Featured on iTechGuides

Open Source Currency Converter is listed in our Currency Converter Apps directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 31 Oct 2026 · How we research and update